1. General description
The 74HC123-Q100 ; 74HCT123-Q100 are high-speed Si-gate CM OS devices and are pin
compatible with Low- power Schottky TT L (L STTL). They are specified in compliance with
JEDEC standard no. 7A.
The 74HC123-Q100; 74HCT123-Q100 are dual retriggerable monostable multivibrators
with output pulse width control by three methods:
1. The basic pulse is defined by the selection of the external resistor (REXT) and
capacitor (CEXT).
2. Once triggered, the basic output pulse width may be extended by retriggering the
gated active LOW- going edge input (nA) or the active HIGH-going edge in put (nB). By
repeating this process, the ou tput pulse period ( nQ = HIGH, nQ = LOW) can be made
as long as desired. Alternatively an output delay can be terminated at any time by a
LOW-going edge on input nRD, which also inhibits the triggering.
3. An internal connection from nRD to the input gates makes it possible to trigger the
circuit by a HIGH-going signal at input nRD as shown in Table 3.
Schmitt trigger action in the nA and nB input s, makes the circuit highly tolerant to slower
input rise and fall times.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
2. Features and benefits
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from 40 C to +85 C and from 40 C to +125 C
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output puls e
Schmitt trigger action on all inputs except for the reset input
ESD protection:
MIL-STD-883, method 3015 exceeds 2000 V
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V (C = 200 pf, R = 0 )
Specified from 40 Cto+85C and from 40 Cto+125C
74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
Rev. 2 — 19 January 2015 Product data sheet
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 2 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
3. Ordering information
4. Functional diagram
Table 1. Ordering information
Type number Package
Temperature range Name Description Version
74HC123D-Q100 40 C to +125 C SO16 plastic small outline package; 16 leads;
body width 3.9 mm SOT109-1
74HCT123D-Q100
74HC123PW-Q100 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm SOT403-1
74HCT123PW-Q100
74HC123BQ-Q100 40 C to +125 C DHVQFN16 plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5 3.5 0.85 mm
SOT763-1
Fig 1. Functional di agram
4
4
5'
5'
6
5(;7&(;7

&(;7

4
4
DDD
5'
$
$

%

%
7
4
5'
6
5(;7&(;7
&(;7
4
44

7
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 3 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
Fig 2. Logic symbol Fig 3. IEC logic symbol
4
4
5'
5'
6
5(;7&(;7

5(;7&(;7 
&(;7
&(;7 
4
4
4
4 
PQD
5'
$
$
 %

%
7
PQD
&;

5&;
5


&;


5&;
5

Fig 4. Logic diag ram
PQD
Q5(;7&(;7
9&&
9&& 9&&
5
Q5'
Q$
Q% 5
&/
&/ &/
&/ &/
Q4
Q4
5
5
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 4 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1 Pinning
5.2 Pin description
(1) This is not a supply pin. The substrate is attached to this
pad using conductive die attach material. There is no
electrical or mechanical requirement to solder this pad.
However, if it is soldered, the solder land should remain
floating or be connected to VCC.
Fig 5. Pin configuration for SO16 and TSSOP16 Fig 6. Pin configuration for DHVQFN16
+&4
+&74
$ 9&&
% 5(;7&(;7
5' &(;7
4 4
4 4
&(;7 5'
5(;7&(;7 %
*1' $
DDD







DDD
+&4
5(;7&(;7
%
&(;7 5'
4 4
4 4
5' &(;7
%
5(;7&(;7
*1'
$
$
9
&&
7UDQVSDUHQWWRSYLHZ







WHUPLQDO
LQGH[DUHD
9
&&
Table 2. Pin description
Symbol Pin Description
1A 1 negative-edge triggered input 1
1B 2 positive-edge triggered input 1
1RD 3 direct reset LOW and positive-edge triggered input 1
1Q 4 active LOW output 1
2Q 5 active HIGH output 2
2CEXT 6 external capacitor connection 2
2REXT/CEXT 7 external resistor and capacitor connection 2
GND 8 ground (0 V)
2A 9 negative-edge triggered input 2
2B 10 positive-edge triggered input 2
2RD 11 direct reset LOW and positive-edge triggered input 2
2Q 12 active LO W output 2
1Q 13 active HIGH output 1
1CEXT 14 external capacitor connection 1
1REXT/CEXT 15 external resistor and capacitor connection 1
VCC 16 supply vol tage
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 5 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
6. Functional description
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; = LOW-to-HIGH transition; = HIGH-to-LOW transition;
= one HIGH level output pulse; = one LOW level output pulse.
[2] If the monostable was triggered before this condition was established, the pulse continues as programmed.
7. Limiting values
[1] For SO16 packages: Ptot derates linearly with 8 mW/K above 70 C.
[2] For TSSOP16 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
[3] For DHVQFN16 packages: Ptot derates linearly with 4.5 mW/K above 60 C.
Table 3. Function table[1]
Input Output
nRD nA nB nQ nQ
LXXLH
XHXL
[2] H[2]
XXLL
[2] H[2]
HL
HH
LH
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Max Unit
VCC supply voltage 0.5 +7 V
IIK input clamping current VI < 0.5 V or VI>V
CC + 0.5 V - 20 mA
IOK output clamping current VO<0.5 V or VO > VCC + 0.5 V - 20 mA
IOoutput current except for pins nREXT/CEXT;
VO=0.5 V to (VCC +0.5V) -25 mA
ICC supply current - 50 mA
IGND ground current - 50 mA
Tstg storage temperature 65 +150 C
Ptot total power dissipation
SO16 package [1] - 500 mW
TSSOP16 package [2] - 500 mW
DHVQFN16 package [3] - 500 mW
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 6 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
8. Recommended operating conditions
9. Static characteristics
Table 5. Recommended operating con ditions
Symbol Parameter Conditions 74HC123-Q100 74HCT123-Q100 Unit
Min Typ Max Min Typ Max
VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V
VIinput voltage 0 - VCC 0-V
CC V
VOoutput voltage 0 - VCC 0-V
CC V
t/V input transition rise and
fall rate nRD input
VCC = 2.0 V - - 625 - - - ns/V
VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V
VCC = 6.0 V - - 83 - - - ns/V
Tamb ambient temperature 40 +25 +125 40 +25 +125 C
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
74HC123-Q100
VIH HIGH-level
input voltage VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V
VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V
VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V
VIL LOW-level
input voltage VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V
VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V
VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V
VOH HIGH-level
output voltage VI=V
IH or VIL
IO=20 A; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V
IO=20 A; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V
IO=20 A; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V
IO=4mA; V
CC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V
IO=5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V
VOL LOW-level
output voltage VI=V
IH or VIL
IO=20A; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V
IO=20A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V
IO=20A; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V
IO=4mA; V
CC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V
IO= 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V
IIinput leakage
current VI=V
CC or GND; VCC =6.0V - - 0.1 - 1.0 - 1.0 A
ICC supply current VI=V
CC or GND; IO=0A;
VCC =6.0V - - 8.0 - 80 - 160 A
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 7 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
CIinput
capacitance -3.5- - - - -pF
74HCT123-Q100
VIH HIGH-level
input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V
VIL LOW-level
input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V
VOH HIGH-level
output voltage VI=V
IH or VIL; VCC =4.5V
IO=20 A 4.4 4.5 - 4.4 - 4.4 - V
IO=4 mA 3.98 4.32 - 3.84 - 3.7 - V
VOL LOW-level
output voltage VI=V
IH or VIL; VCC =4.5V
IO=20A - 0 0.1 - 0.1 - 0.1 V
IO= 4.0 mA - 0.15 0.26 - 0.33 - 0.4 V
IIinput leakage
current VI=V
CC or GND; VCC =5.5V - - 0.1 - 1.0 - 1.0 A
ICC supply current VI=V
CC or GND; IO=0A;
VCC =5.5V - - 8.0 - 80 - 160 A
ICC additional
supply current per input pin; IO=0A;
VI=V
CC 2.1 V;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V
pins nA, nB - 35 125 - 160 - 170 A
pin nRD - 50 180 - 225 - 245 A
CIinput
capacitance -3.5- - - - -pF
Table 6. Static characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 8 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7. Dy namic characteristics
Voltages are referenced to GND (ground = 0 V); C L= 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
74HC123-Q100
tpd propagation
delay nRD, nA, nB to nQ or nQ;
CEXT = 0 pF; REXT =5k;
see Figure 9
[1]
VCC = 2.0 V - 83 255 - 320 - 385 ns
VCC = 4.5 V - 30 51 - 64 - 77 ns
VCC = 5 V; CL = 15 pF - 26 - - - - - ns
VCC = 6.0 V - 24 43 - 54 - 65 ns
nRD (reset) to nQ or nQ;
CEXT =0pF; R
EXT =5k;
see Figure 9
VCC = 2.0 V - 66 215 - 270 - 325 ns
VCC = 4.5 V - 24 43 - 54 - 65 ns
VCC = 5 V; CL = 15 pF - 20 - - - - - ns
VCC = 6.0 V - 19 37 - 46 - 55 ns
tttransition
time see Figure 9 [1]
VCC = 2.0 V - 19 75 - 95 - 110 ns
VCC = 4.5 V - 7 15 - 19 - 22 ns
VCC = 6.0 V - 6 13 - 16 - 19 ns
tWpulse width nA LOW; see Figure 10
VCC = 2.0 V 100 8 - 125 - 1 50 - ns
VCC = 4.5 V 20 3 - 25 - 30 - ns
VCC = 6.0 V 17 2 - 21 - 26 - ns
nB HIGH; see Figure 10
VCC = 2.0 V 100 17 - 125 - 150 - ns
VCC = 4.5 V 20 6 - 25 - 30 - ns
VCC = 6.0 V 17 5 - 21 - 26 - ns
nRD LOW; see Figure 11
VCC = 2.0 V 100 14 - 125 - 150 - ns
VCC = 4.5 V 20 5 - 25 - 30 - ns
VCC = 6.0 V 17 4 - 21 - 26 - ns
nQ HIGH and nQ LOW;
VCC =5.0V;
see Figure 10 and Figure 11
[2]
CEXT = 100 nF; REXT = 10
k-450- - - - - s
CEXT = 0 pF; REXT =5k-75- - - - -ns
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 9 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
trtrig retrigger
time nA,nB; C
EXT = 0 pF; REXT =
5 k; VCC = 5.0 V;
see Figure 10
[3][4] -110- - - - - ns
REXT external
resistance see Figure 7
VCC = 2.0 V 10 - 1000 - - - - k
VCC = 5.0 V 2 - 1000 - - - - k
CEXT external
capacitance VCC = 5.0 V; see Figure 7 [4] --- - - - -pF
CPD power
dissipation
capacitance
per monostable; VI= GND
to VCC
[5] -54- - - - -pF
74HCT123-Q100
tPHL HIGH to
LOW
propagation
delay
nRD, nA, nB to nQ or nQ;
CEXT = 0 pF; REXT = 5 k;
see Figure 9
VCC = 4.5 V - 30 51 - 64 - 77 ns
VCC = 5 V; CL=15pF - 26 - - - - - ns
nRD (reset) to nQ or nQ;
CEXT =0pF; R
EXT =5k;
see Figure 9
VCC = 4.5 V - 27 46 - 58 - 69 ns
VCC = 5 V; CL=15pF - 23 - - - - - ns
tPLH LOW to
HIGH
propagation
delay
nRD, nA, nB to nQ or nQ;
CEXT = 0 pF; REXT =5k;
see Figure 9
VCC = 4.5 V - 28 51 - 64 - 77 ns
VCC = 5 V; CL=15pF - 26 - - - - - ns
nRD (reset) to nQ or nQ;
CEXT =0pF; R
EXT = 5 k;
see Figure 9
VCC = 4.5 V - 23 46 - 58 - 69 ns
VCC = 5 V; CL=15pF - 23 - - - - - ns
tttransition
time VCC = 4.5 V; see Figure 9 [1] - 7 15 - 19 - 22 ns
tWpulse width VCC = 4.5 V
nA LOW; see Figure 10 20 3 - 25 - 30 - ns
nB HIGH; see Figure 10 20 5 - 25 - 30 - ns
nRD LOW; see Figure 11 20 7 - 25 - 30 - ns
nQ HIGH and nQ LOW;
VCC = 5.0 V; see Figure 10
and Figure 11
[2]
CEXT = 100 nF; REXT = 10
k-450- - - - - s
CEXT = 0 pF; REXT =5k-75- - - - -ns
Table 7. Dy namic characteristics …continued
Voltages are referenced to GND (ground = 0 V); C L= 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 10 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
[1] tpd is the same as tPHL and tPLH; tt is the same as tTHL and tTLH
[2] For other REXT and CEXT combinations, see Figure 7. If CEXT > 10 nF, the following formula is valid.
tW=KREXT CEXT, where:
tW= typical output pulse width in ns;
REXT = external resistor in k;
CEXT = external capacitor in pF;
K = constant = 0.45 for VCC = 5.0 V and 0.55 for VCC =2.0V.
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is approximately 7 pF.
[3] The time to retrigger the monostable multivibrator depends on the values of REXT and CEXT. The output pulse width is only extended
when the time between the active-going edges of the trigger input pulses meets the minimum retrigger time. If CEXT >10 pF, the next
formula (at VCC = 5.0 V) for the setup time of a retrigger pulse is valid:
trtrig = 30 + 0.19 REXT CEXT0.9 +13REXT1.05, where:
trtrig = retrigger time in ns;
CEXT = external capacitor in pF; REXT = external resistor in k.
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is 7 pF.
[4] When the device is powered-up, initiate the device via a reset pulse, when CEXT <50pF.
[5] CPD is used to determine the dynamic power dissipation (PD in W).
PD=C
PD VCC2fi+(CLVCC2fo) + 0.75 CEXT VCC2fo+D16 VCC where:
fi= input frequency in MHz;
fo= output frequency in MHz;
D = duty factor in %;
CL= output load capacitance in pF;
VCC = supply voltage in V;
CEXT = timing capacitance in pF;
(CLVCC2 fo) sum of outputs.
trtrig retrigger
time nA,nB; C
EXT = 0 pF; REXT =
5 k; VCC = 5.0 V;
see Figure 10
[3][4] -110- - - - - ns
REXT external
timing
resistor
VCC = 5.0 V; see Figure 7 2-1000- - - -k
CEXT external
timing
capacitor
VCC = 5.0 V; see Figure 7 [4] --- - - - -pF
CPD power
dissipation
capacitance
per monostable;
VI=GNDtoV
CC 1.5 V [5] -56- - - - -pF
Table 7. Dy namic characteristics …continued
Voltages are referenced to GND (ground = 0 V); C L= 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 11 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
VCC = 5.0 V; Tamb = 25 C.
(1) REXT = 100 k
(2) REXT = 50 k
(3) REXT = 10 k
(4) REXT = 2 k
CEXT = 10 nF; REXT = 10 k to 100 k.
Tamb = 25 C.
Fig 7. Typical output pulse width as a function of the
external capacitor value Fig 8. 74HC123-Q100 typical ‘K’ factor as function of
VCC
DDD





W:
QV

&(;7S)


 




9&&9

DDD




.IDFWRU
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 12 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
11. Waveforms
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 9. Propagation delays from inputs (nA, nB, nRD) to outputs (nQ, nQ) and output transition times
DDD
Q%
LQSXW
W:
W:
W3/+
90
92+
90
90
W:
W3/+
W7+/
W:
W3+/
W3+/
90
W:
W3/+
Q$
LQSXW
Q5'LQSXW
Q4
RXWSXW
Q4
RXWSXW
90
W7/+
9<
9;
9<
9;
W3+/
W3+/ W3/+
UHVHW
UHVHW
92/
92+
92/
9,
9,
9
,
*1'
*1'
*1'
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 13 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
nRD = HIGH
Fig 10. Output pulse control using retrigger pulse
nA = LOW
Fig 11. Output pulse con t rol using reset inpu t nRD
PQD
W:W:
W:
Q%LQSXW
Q5'LQSXW
Q4RXWSXW
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 14 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
Test data is given in Table 8.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch.
Fig 12. Test circuit for measuring switching times
9
0
9
0
W
:
W
:


9
9
,
9
,
QHJDWLYH
SXOVH
SRVLWLYH
SXOVH
9
9
0
9
0


W
I
W
U
W
U
W
I
DDG
'87
9
&&
9
&&
9,92
57
5/6
&/
RSHQ
*
Table 8. Test data
Type Input Load S1 position
VItr, tfCLRLtPHL, tPLH
74HC123-Q100 VCC 6 ns 15 pF, 50 pF 1 kopen
74HCT123-Q100 3 V 6 ns 15 pF, 50 pF 1 kopen
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 15 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
12. Application information
12.1 T iming component connections
The basic output pulse width is defined by the values of the external timing components
REXT and CEXT.
12.2 Power-up considerations
When the monostable is powered-up, it may produce an output pulse, with a pulse width
defined by the values of REXT and CEXT. This output pulse can be eliminated using the
circuit shown in Figure 14.
(1) For minimum noise generation, ground pins 6 (2CEXT) and 14 (1CEXT) externally to pin 8 (GND).
Fig 13. Timing component connections
DDD
&(;7 5(;7
Q$
Q%
9
&&
Q&(;7
Q5'
Q5(;7&(;7
Q4
Q4
*1'
 






Fig 14. Power-up output pulse elimination circuit
DDD
9&&
5(6(7
Q5'
&(;7 5(;7
Q$
Q%
9&&
Q&(;7*1' Q5(;7&(;7
Q4
Q4
 





© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 16 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
12.3 Power-down considerations
A large capacitor CEXT may cause problems when powering-d own the mono stable due to
the energy stored in this capacitor. When a system containing this device is
powered-down or a rapid decrease of VCC to zero occurs, the monostable may sustain
damage. The damage is due to the capacitor discharging through the input protection
diodes. To avoid this possibility, use a damping diode (DEXT) and connec t as show n in
Figure 15. DEXT is preferably a germanium or Schottky type diode able to withstand large
current surges.
Fig 15. Power-down protection circuit
DDD
'(;7
Q5'
&(;7 5(;7
Q$
Q%
9&&
Q&(;7 Q5(;7&(;7
Q4
Q4
 





*1'

© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 17 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
13. Package outline
Fig 16. Package outline SOT109-1 (SO16)
;
Z 0
ș
$
$

$

E
S
'
+
(
/
S
4
GHWDLO;
(
=
H
F
/
Y 0 $
$

$




\
SLQLQGH[
81,7 $
PD[ $
 $
 $
 E
S F '
 (
 
H +
( / /
S 4 =\ZY ș
5()(5(1&(6
287/,1(
9(56,21
(8523($1
352-(&7,21 ,668('$7(
,(& -('(& -(,7$
PP
LQFKHV
 


  






  




 

R
R
 
',0(16,216LQFKGLPHQVLRQVDUHGHULYHGIURPWKHRULJLQDOPPGLPHQVLRQV
1RWH
3ODVWLFRUPHWDOSURWUXVLRQVRIPPLQFKPD[LPXPSHUVLGHDUHQRWLQFOXGHG


627 

( 06
 


  






 










 


  PP
VFDOH
62SODVWLFVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP 627
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 18 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
Fig 17. Package outline SOT403-1 (TSSOP16)
81,7 $
 $
 $
 E
S F ' ( 
H +
( / /
S 4 =\ZY ș
5()(5(1&(6
287/,1(
9(56,21
(8523($1
352-(&7,21 ,668('$7(
,(& -('(& -(,7$
PP 










  







R
R
 
',0(16,216PPDUHWKHRULJLQDOGLPHQVLRQV
1RWHV
3ODVWLFRUPHWDOSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG
3ODVWLFLQWHUOHDGSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG


627 02 

Z 0
E
S
'
=
H

 
 
ș
$
$

$

/
S
4
GHWDLO;
/
$

+
(
(
F
Y 0 $
;
$
\
  PP
VFDOH
76623SODVWLFWKLQVKULQNVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP 627
$
PD[

SLQLQGH[
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 19 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
Fig 18. Package outline SOT763-1 (DHVQFN16)
WHUPLQDO
LQGH[DUHD

$ (K
E
81,7 \H

F
5()(5(1&(6
287/,1(
9(56,21
(8523($1
352-(&7,21 ,668('$7(
,(& -('(& -(,7$
PP 

'K


\




H




  
',0(16,216PPDUHWKHRULJLQDOGLPHQVLRQV
627 02 


/

Y

Z
  PP
VFDOH
627
'+94)1SODVWLFGXDOLQOLQHFRPSDWLEOHWKHUPDOHQKDQFHGYHU\WKLQTXDGIODWSDFNDJHQROHDGV
WHUPLQDOVERG\[[PP
$
PD[
$
$
F
GHWDLO;
\
\ &
H
/
(K
'K
H
H
E
 
 




;
'
(
&
% $
WHUPLQDO
LQGH[DUHD
$&
&
%
Y 0
Z 0
(

1RWH
3ODVWLFRUPHWDOSURWUXVLRQVRIPPPD[LPXPSHUVLGHDUHQRWLQFOXGHG
'



© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 20 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
14. Abbreviations
15. Revision history
Table 9. Abbreviations
Acronym Abbreviation
CMOS Complementary Metal Oxide Semiconductor
DUT Device Under Test
ESD ElectroStatic Discharge
HBM Human Body Model
LSTTL Low-power Schottky Transistor-T ransistor Logic
MM Machine Model
MIL Military
Table 10. Revision history
Document ID Release date Data sheet status Change notice Supersedes
74HC_HCT123_Q10 0 v.2 20150119 Product data sheet - 74HC_HCT123_Q10 0 v.1
Modifications: •Table 7: Power dissipation capacitance condition for 74HCT123-Q100 is corrected.
74HC_HCT123_Q10 0 v.1 20120801 Product data sheet - -
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 21 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
16. Legal information
16.1 Data sheet status
[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term ‘short data sheet’ is explained in section “Definitions”.
[3] The product status of de vice(s) descr ibed in th is docume nt may have cha nged since this docume nt was publis hed and ma y dif fer in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nexperia.com.
16.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liab ility for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and tit le. A short data sh eet is intended
for quick reference only and shou ld not be rel ied u pon to cont ain det ailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conf lict with the short data sheet, the
full data sheet shall pre vail.
Product specificatio n — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the Nexperia product is
deemed to off er functions and qualities beyond those described in the
Product data sheet.
16.3 Disclaimers
Limited warr a nty and liability — Information in this document is believed to
be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. Nexperia takes no
responsibility for the content in this document if provided by an inf ormation
source outside of Nexperia.
In no event shall Nexperia be liable for any indirect, incidental,
punitive, special or consequ ential damages (including - wit hout limitatio n - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all informa tion supplied prior
to the publication hereof .
Suitability for use in automotive applications — This Nexperia
product has been qualified for use in automotive
applications. Unless ot herwise agreed in writing, t he product is not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of a Nexperia product can reasonably be expected
to result in perso nal injury, death or severe propert y or environment al
damage. Nexperia and its suppliers accept no liability for
inclusion and/or use of Nexperia products in such equipment or
applications an d ther efo re su ch inclusi on a nd/or use is at the cu stome r's own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no
representation or warranty tha t such application s will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and ope ration of their applications
and products using Nexperia products, and Nexperia
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the Nexperia
product is suitable and fit for the customer’s applications and
products planned, as well as fo r the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
Nexperia does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessa ry
testing for the customer’s applications and products using Nexperia
products in order to avoid a default of the applications and
the products or of the application or use by cust omer’s third party
customer(s). Nexperia does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanent ly and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nexperia.com/profile/terms, unless otherwise
agreed in a valid written individua l agreement. In case an individual
agreement is concluded only the ter ms and conditions of the respective
agreement shall apply. Nexperia hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of Nexperia products by customer.
Document status[1][2] Product status[3] Definition
Objective [short] data sheet Development This document contains data from the obj ective specification for product development.
Preliminary [short] dat a sheet Qualification This document contains data from the preliminary specification.
Product [short] dat a sheet Production This document contains the product specification.
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123_Q100 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 2 — 19 January 2015 22 of 23
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
No offer to sell or license — Nothing in this document may be interpret ed or
construed as an of fer to sell product s that is op en for accept ance or the grant ,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
16.4 Trademarks
Notice: All referenced b rands, produc t names, service names and trademarks
are the property of their respect i ve ow ners.
17. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Nexperia 74HC123-Q100; 74HCT123-Q100
Dual retriggerable monostable multivibrator with reset
18. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 2
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
6 Functional description . . . . . . . . . . . . . . . . . . . 5
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5
8 Recommended operating conditions. . . . . . . . 6
9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 6
10 Dynamic characteristics . . . . . . . . . . . . . . . . . . 8
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
12 Application information. . . . . . . . . . . . . . . . . . 15
12.1 Timing component connections . . . . . . . . . . . 15
12.2 Power-up considerations . . . . . . . . . . . . . . . . 15
12.3 Power-down considerations . . . . . . . . . . . . . . 16
13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 17
14 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 20
15 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 20
16 Legal information. . . . . . . . . . . . . . . . . . . . . . . 21
16.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 21
16.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
16.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
17 Contact information. . . . . . . . . . . . . . . . . . . . . 22
18 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
© Nexperia B.V. 2017. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release:
19 January 2015