SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Inputs Are TTL-Voltage Compatible
D
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), Thin Very Small-Outline (DGV), Thin
Shrink Small-Outline (PW), and Ceramic
Flat (W) Packages, Ceramic Chip Carriers
(FK), and Standard Plastic (N) and Ceramic
(J) DIPs
description
The ’HCT14 devices contain six independent
inverters. The devices perform the Boolean
function Y = A in positive logic.
The SN54HCT14 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74HCT14 is characterized for
operation from –40°C to 85°C.
FUNCTION TABLE
(each inverter)
INPUT
AOUTPUT
Y
H L
L H
logic symbol†
1
1A 3
2A
1Y
2
5
3A 9
4A
2Y
4
11
5A 13
6A
3Y
6
4Y
8
5Y
10
6Y
12
†This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, DB, DGV, J, N, PW, and W packages.
logic diagram (positive logic)
AY
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1Y
2A
2Y
3A
3Y
GND
VCC
6A
6Y
5A
5Y
4A
4Y
SN54HCT14 ...J OR W PACKAGE
SN74HCT14 . . . D, DB, DGV, N, OR PW PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
6Y
NC
5A
NC
5Y
2A
NC
2Y
NC
3A
1Y
1A
NC
4Y
4A V
6A
3Y
GND
NC
SN54HCT14 . . . FK PACKAGE
(TOP VIEW)
CC
NC – No internal connection
Copyright 2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range†
Supply voltage range, VCC –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI (see Note 1) –0.5 V to VCC +0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO (see Note 1) –0.5 V to VCC +0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK (VI < 0 or VI > VCC) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0 or VO > VCC) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, IO (VO = 0 to VCC) ±25 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θJA (see Note 2): D package 86°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DB package 96°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DGV package 127°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 80°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package 113°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only , and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may af fect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions (see Note 3)
SN54HCT14 SN74HCT14
UNIT
MIN MAX MIN MAX
UNIT
VCC Supply voltage 4.5 5.5 4.5 5.5 V
VIInput voltage 0 VCC 0 VCC V
VOOutput voltage 0 VCC 0 VCC V
TAOperating free-air temperature –55 125 –40 85 °C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs
, literature number SCBA004.
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C SN54HCT14 SN74HCT14
UNIT
PARAMETER
TEST
CONDITIONS
V
CC MIN TYP MAX MIN MAX MIN MAX
UNIT
VT+
Positive going
4.5 V 1.2 1.5 1.9 1.2 1.9 1.2 1.9
V
P
os
iti
ve-go
i
ng
threshold 5.5 V 1.4 1.7 2.1 1.4 2.1 1.4 2.1
V
VT–
Negative going
4.5 V 0.5 0.9 1.2 0.5 1.2 0.5 1.2
V
N
ega
ti
ve-go
i
ng
threshold 5.5 V 0.6 1 1.4 0.6 1.4 0.6 1.4
V
∆VT
Hysteresis
4.5 V 0.4 0.6 1.4 0.4 1.4 0.4 1.4
V
H
ys
t
eres
i
s
(VT+ – VT–)5.5 V 0.4 0.65 1.5 0.4 1.5 0.4 1.5
V
VOH
IOH = –20 µA4.5 V 4.4 4.49 4.4 4.4
V
V
OH IOH = –4 mA 4.5 V 3.98 4.3 3.7 3.84
V
VOL
IOL = 20 µA4.5 V 0.001 0.1 0.1 0.1
V
V
OL IOL = 4 mA 4.5 V 0.17 0.26 0.4 0.33
V
IIVI = VCC or GND 5.5 V ±0.1 ±1±1µA
ICC VI = VCC or GND, IO = 0 5.5 V 2 40 20 µA
∆ICC†One input at 0.5 V or 2.4 V,
Other inputs at GND or VCC 5.5 V 0.2 2.4 3 2.9 mA
CiVI = VCC or GND 5 V 3 10 10 10 pF
†This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO
VCC
TA = 25°C SN54HCT14 SN74HCT14
UNIT
PARAMETER
(INPUT) (OUTPUT)
V
CC MIN TYP MAX MIN MAX MIN MAX
UNIT
td
A
Y
4.5 V 20 32 48 40
ns
t
pd
A
Y
5.5 V 18 30 45 38
ns
tt
Y
4.5 V 7 15 22 19
ns
t
t
Y
5.5 V 6 14 20 17
ns
operating characteristics, TA = 25°C
PARAMETER TEST CONDITIONS TYP UNIT
Cpd Power dissipation capacitance No load 10 pF
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES
1.3 V
1.3 V1.3 V 10%10% 90% 90%
3 V
VOH
VOL
0 V
trtf
Input
In-Phase
Output
1.3 V
tPLH tPHL
1.3 V 1.3 V
10% 10% 90%90% VOH
VOL
tr
tf
tPHL tPLH
Out-of-Phase
Output
Test
Point
From Output
Under Test
LOAD CIRCUIT
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily . All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. tPLH and tPHL are the same as tpd.
CL = 50 pF
(see Note A)
1.3 V1.3 V 10%10% 90% 90% VCC
0 V
trtf
Input
Figure 1. Load Circuit and Voltage Waveforms
SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225C – JULY 1995 – REVISED FEBRUARY 2000
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
0.25
0.2
0.1
0.05
0
0.45
0.15
0 0.45 0.9 1.35 1.8 2.26 2.7
– Supply Current – mA
0.35
0.3
0.4
SUPPLY CURRENT
vs
INPUT VOLTAGE
0.5
3.16 3.61 4
VI – Input Voltage – V
ÁÁ
ÁÁ
ICC
VI = 0 to VCC
VI = VCC to 0
VCC = 4.5 V
0.25
0.2
0.1
0.05
0
0.45
0.15
0 0.55 1.1 1.66 2.2 2.76 3.3
– Supply Current – mA
0.35
0.3
0.4
SUPPLY CURRENT
vs
INPUT VOLTAGE
0.5
3.86 4.4 4.97
VI – Input Voltage – V
ÁÁ
ÁÁ
ICC
VI = 0 to VCC
VI = VCC to 0
VCC = 5.5 V
0 0.75 1.5 2.27
– Output Voltage – V
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
3 3.77
6
5
4
3
2
1
0
–1
VO
VI – Input Voltage – V
VI = Down
VI = Up
VCC = 4.5 V
0 0.92 1.84 2.76
– Output Voltage – V
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
3.68 4.6
6
5
4
3
2
1
0
–1
VO
VI – Input Voltage – V
VI = Down
VI = Up
VCC = 5.5 V
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