1. General description
The 74HC245; 74HCT245 is a high-speed Si-gate CMOS device and is pin compatible
with Low-Power Schottky TTL (LSTTL).
The 74HC245; 74HCT245 is an octal transceiver featuring non-inverting 3-state bus
compatible outputs in both send and receive directions. The 74HC245; 74HCT245
features an output enable input (OE) for easy cascading and a send/receive input (DIR)
for direction control. OE controls the outputs so that the buses are effectively isolated.
The 74HC245; 74HCT245 is similar to the 74HC640; 74HCT640 but has true
(non-inverting) outputs.
2. Features
■Octal bidirectional bus interface
■Non-inverting 3-state outputs
■Multiple package options
■Complies with JEDEC standard no. 7A
■ESD protection:
◆HBM EIA/JESD22-A114-B exceeds 2000 V
◆MM EIA/JESD22-A115-A exceeds 200 V
■Specified from −40 °Cto+85°C and from −40 °C to +125 °C
3. Quick reference data
74HC245; 74HCT245
Octal bus tranceiver; 3-state
Rev. 03 — 31 January 2005 Product data sheet
Table 1: Quick reference data
GND = 0 V; T
amb
=25
°
C; t
r
=t
f
= 6 ns.
Symbol Parameter Conditions Min Typ Max Unit
Type 74HC245
tPHL, tPLH propagation delay
An to Bn or Bn to An CL=15pF;
VCC =5V -7-ns
CIinput capacitance - 3.5 - pF
CI/O input/output capacitance - 10 - pF
CPD power dissipation
capacitance per
transceiver
VI= GND to VCC [1] -30-pF
Type 74HCT245
tPHL, tPLH propagation delay
An to Bn or Bn to An CL=15pF;
VCC =5V -10-ns
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 2 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
[1] CPD is used to determine the dynamic power dissipation (PD in µW):
PD=C
PD ×VCC2×fi×N+∑ (CL×VCC2×fo) where:
fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑(CL×VCC2×fo) = sum of outputs.
4. Ordering information
CIinput capacitance - 3.5 - pF
CI/O input/output capacitance - 10 - pF
CPD power dissipation
capacitance per
transceiver
VI= GND to
VCC −1.5 V [1] -30-pF
Table 1: Quick reference data
…continued
GND = 0 V; T
amb
=25
°
C; t
r
=t
f
= 6 ns.
Symbol Parameter Conditions Min Typ Max Unit
Table 2: Ordering information
Type number Package
Temperature range Name Description Version
74HC245N −40 °C to +125 °C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HC245D −40 °C to +125 °C SO20 plastic small outline package; 20 leads;
body width 7.5 mm SOT163-1
74HC245PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm SOT360-1
74HC245DB −40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm SOT339-1
74HC245BQ −40 °C to +125 °C DHVQFN20 plastic dual-in-line compatible thermal enhanced
very thin quad flat package no leads; 20 terminals;
body 2.5 ×4.5 ×0.85 mm
SOT764-1
74HCT245N −40 °C to +125 °C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HCT245D −40 °C to +125 °C SO20 plastic small outline package; 20 leads;
body width 7.5 mm SOT163-1
74HCT245PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm SOT360-1
74HCT245DB −40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm SOT339-1
74HCT245BQ −40 °C to +125 °C DHVQFN20 plastic dual-in-line compatible thermal enhanced
very thin quad flat package no leads; 20 terminals;
body 2.5 ×4.5 ×0.85 mm
SOT764-1
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 3 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
5. Functional diagram
Fig 1. Logic symbol Fig 2. IEC logic symbol
2
1DIR
18
19
B0
B1
B2
B3
B4
B5
B6
B7
3
17
4
16
5
15
6
14
7
13
8
12
9
A0
A1
A2
A3
A4
A5
A6
A7
11
OE
mna174
173
1
19
2
1
16
4
15
5
14
6
13
7
12
8
119
18
G3
3EN1
3EN2
2
mna175
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 4 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
6. Pinning information
6.1 Pinning
6.2 Pin description
(1) The die substrate is attached to this
pad using conductive die attach
material. It can not be used as supply
pin or input
Fig 3. Pin configuration DIP20, SO20,
SSOP20 and TSSOP20 Fig 4. Pin configuration DHVQFN20
245
DIR VCC
A0 OE
A1 B0
A2 B1
A3 B2
A4 B3
A5 B4
A6 B5
A7 B6
GND B7
001aac431
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
001aac432
245
GND(1)
Transparent top view
B6
A6
A7
B5
A5 B4
A4 B3
A3 B2
A2 B1
A1 B0
A0 OE
GND
B7
DIR
VCC
912
8 13
7 14
6 15
5 16
4 17
3 18
2 19
10
11
1
20
terminal 1
index area
Table 3: Pin description
Symbol Pin Description
DIR 1 direction control
A0 2 data input/output
A1 3 data input/output
A2 4 data input/output
A3 5 data input/output
A4 6 data input/output
A5 7 data input/output
A6 8 data input/output
A7 9 data input/output
GND 10 ground (0 V)
B7 11 data input/output
B6 12 data input/output
B5 13 data input/output
B4 14 data input/output
B3 15 data input/output
B2 16 data input/output
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 5 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
7. Functional description
7.1 Function table
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
8. Limiting values
[1] For DIP20 packages: above 70 °C, Ptot derates linearly with 12 mW/K.
For SO20 packages: above 70 °C, Ptot derates linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60 °C, Ptot derates linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60 °C, Ptot derates linearly with 4.5 mW/K.
B1 17 data input/output
B0 18 data input/output
OE 19 output enable input (active LOW)
VCC 20 supply voltage
Table 3: Pin description
…continued
Symbol Pin Description
Table 4: Function table[1]
Input Input/output
OE DIR An Bn
L L A = B input
L H input B = A
HXZZ
Table 5: 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 diode current VI < −0.5 V or VI>V
CC + 0.5 V - ±20 mA
IOK output diode current VO<−0.5 V or
VO>V
CC + 0.5 V -±20 mA
IOoutput source or sink
current VO = −0.5 V to VCC + 0.5 V - ±35 mA
ICC, IGND VCC or GND current - ±70 mA
Tstg storage temperature −65 +150 °C
Ptot total power dissipation [1]
DIP20 package - 750 mW
SO20, SSOP20,
TSSOP20 and
DHVQFN20 packages
- 500 mW
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 6 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
9. Recommended operating conditions
10. Static characteristics
Table 6: Recommended operating conditions
Symbol Parameter Conditions Min Typ Max Unit
Type 74HC245
VCC supply voltage 2.0 5.0 6.0 V
VIinput voltage 0 - VCC V
VOoutput voltage 0 - VCC V
tr, tfinput rise and fall
times VCC = 2.0 V - - 1000 ns
VCC = 4.5 V - 6.0 500 ns
VCC = 6.0 V - - 400 ns
Tamb ambient temperature −40 - +125 °C
Type 74HCT245
VCC supply voltage 4.5 5.0 5.5 V
VIinput voltage 0 - VCC V
VOoutput voltage 0 - VCC V
tr, tfinput rise and fall
times VCC = 4.5 V - 6.0 500 ns
Tamb ambient temperature −40 - +125 °C
Table 7: Static characteristics type 74HC245
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
Tamb =25°C
VIH HIGH-level input voltage VCC = 2.0 V 1.5 1.2 - V
VCC = 4.5 V 3.15 2.4 - V
VCC = 6.0 V 4.2 3.2 - V
VIL LOW-level input voltage VCC = 2.0 V - 0.8 0.5 V
VCC = 4.5 V - 2.1 1.35 V
VCC = 6.0 V - 2.8 1.8 V
VOH HIGH-level output voltage VI=V
IH or VIL
IO=−20 µA; VCC = 2.0 V 1.9 2.0 - V
IO=−20 µA; VCC = 4.5 V 4.4 4.5 - V
IO=−20 µA; VCC = 6.0 V 5.9 6.0 - V
IO=−6.0 mA; VCC = 4.5 V 3.98 4.32 - V
IO=−7.8 mA; VCC = 6.0 V 5.48 5.81 - V
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 7 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
VOL LOW-level output voltage VI=V
IH or VIL
IO=20µA; VCC = 2.0 V - 0 0.1 V
IO=20µA; VCC = 4.5 V - 0 0.1 V
IO=20µA; VCC = 6.0 V - 0 0.1 V
IO= 6.0 mA; VCC = 4.5 V - 0.15 0.26 V
IO= 7.8 mA; VCC = 6.0 V - 0.16 0.26 V
ILI input leakage current VI=V
CC or GND; VCC = 6.0 V - - ±0.1 µA
IOZ OFF-state output current VI=V
IH or VIL; VO=V
CC or GND;
VCC = 6.0 V --±0.5 µA
ICC quiescent supply current VI=V
CC or GND; IO=0A;
VCC = 6.0 V - - 8.0 µA
CIinput capacitance - 3.5 - pF
CI/O input/output capacitance - 10 - pF
Tamb =−40 °C to +85 °C
VIH HIGH-level input voltage VCC = 2.0 V 1.5 - - V
VCC = 4.5 V 3.15 - - V
VCC = 6.0 V 4.2 - - V
VIL LOW-level input voltage VCC = 2.0 V - - 0.5 V
VCC = 4.5 V - - 1.35 V
VCC = 6.0 V - - 1.8 V
VOH HIGH-level output voltage VI=V
IH or VIL
IO=−20 µA; VCC = 2.0 V 1.9 - - V
IO=−20 µA; VCC = 4.5 V 4.4 - - V
IO=−20 µA; VCC = 6.0 V 5.9 - - V
IO=−6.0 mA; VCC = 4.5 V 3.84 - - V
IO=−7.8 mA; VCC = 6.0 V 5.34 - - V
VOL LOW-level output voltage VI=V
IH or VIL
IO=20µA; VCC = 2.0 V - - 0.1 V
IO=20µA; VCC = 4.5 V - - 0.1 V
IO=20µA; VCC = 6.0 V - - 0.1 V
IO= 6.0 mA; VCC = 4.5 V - - 0.33 V
IO= 7.8 mA; VCC = 6.0 V - - 0.33 V
ILI input leakage current VI=V
CC or GND; VCC = 6.0 V - - ±1.0 µA
IOZ OFF-state output current VI=V
IH or VIL; VO=V
CC or GND;
VCC = 6.0 V --±5.0 µA
ICC quiescent supply current VI=V
CC or GND; IO=0A;
VCC = 6.0 V --80µA
Tamb =−40 °C to +125 °C
VIH HIGH-level input voltage VCC = 2.0 V 1.5 - - V
VCC = 4.5 V 3.15 - - V
VCC = 6.0 V 4.2 - - V
Table 7: Static characteristics type 74HC245
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 8 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
VIL LOW-level input voltage VCC = 2.0 V - - 0.5 V
VCC = 4.5 V - - 1.35 V
VCC = 6.0 V - - 1.8 V
VOH HIGH-level output voltage VI=V
IH or VIL -
IO=−20 µA; VCC = 2.0 V 1.9 - - V
IO=−20 µA; VCC = 4.5 V 4.4 - - V
IO=−20 µA; VCC = 6.0 V 5.9 - - V
IO=−6.0 mA; VCC = 4.5 V 3.7 - - V
IO=−7.8 mA; VCC = 6.0 V 5.2 - - V
VOL LOW-level output voltage VI=V
IH or VIL -
IO=20µA; VCC = 2.0 V - - 0.1 V
IO=20µA; VCC = 4.5 V - - 0.1 V
IO=20µA; VCC = 6.0 V - - 0.1 V
IO= 6.0 mA; VCC = 4.5 V - - 0.4 V
IO= 7.8 mA; VCC = 6.0 V - - 0.4 V
ILI input leakage current VI=V
CC or GND; VCC = 6.0 V - - ±1.0 µA
IOZ OFF-state output current VI=V
IH or VIL; VO=V
CC or GND;
VCC = 6.0 V --±10.0 µA
ICC quiescent supply current VI=V
CC or GND; IO=0A;
VCC = 6.0 V - - 160 µA
Table 7: Static characteristics type 74HC245
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
Table 8: Static characteristics type 74HCT245
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
Tamb =25°C
VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - V
VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 V
VOH HIGH-level output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=−20 µA 4.4 4.5 - V
IO=−6 mA 3.98 4.32 - V
VOL LOW-level output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=20µA - 0 0.1 V
IO= 6.0 mA - 0.15 0.26 V
ILI input leakage current VI=V
CC or GND; VCC = 5.5 V - - ±0.1 µA
IOZ OFF-state output current VI=V
IH or VIL; VCC = 5.5 V;
VO=V
CC or GND per input pin;
other inputs at VCC or GND; IO=0A
--±0.5 µA
ICC quiescent supply current VI=V
CC or GND; IO=0A;
VCC = 5.5 V - - 8.0 µA
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 9 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
∆ICC additional quiescent supply
current per input pin VI=V
CC −2.1 V; other inputs at
VI=V
CC or GND;
VCC = 4.5 V to 5.5 V; IO=0A
An or Bn inputs - 40 144 µA
OE input - 150 540 µA
DIR input - 90 324 µA
CIinput capacitance - 3.5 - pF
CI/O input/output capacitance - 10 - pF
Tamb =−40 °C to +85 °C
VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 - - V
VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - - 0.8 V
VOH HIGH-level output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=−20 µA 4.4 - - V
IO=−6 mA 3.84 - - V
VOL LOW-level output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=20µA - - 0.1 V
IO= 6.0 mA - - 0.33 V
ILI input leakage current VI=V
CC or GND; VCC = 5.5 V - - ±1.0 µA
IOZ OFF-state output current VI=V
IH or VIL; VCC = 5.5 V;
VO=V
CC or GND per input pin;
other inputs at VCC or GND; IO=0A
--±5.0 µA
ICC quiescent supply current VI=V
CC or GND; IO=0A;
VCC = 5.5 V --80µA
∆ICC additional quiescent supply
current per input pin VI=V
CC −2.1 V; other inputs at
VI=V
CC or GND;
VCC = 4.5 V to 5.5 V; IO=0A
An or Bn inputs - - 180 µA
OE input - - 675 µA
DIR input - - 405 µA
Tamb =−40 °C to +125 °C
VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 - - V
VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - - 0.8 V
VOH HIGH-level output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=−20 µA 4.4 - - V
IO=−6 mA 3.7 - - V
VOL LOW-level output voltage VI=V
IH or VIL; VCC = 4.5 V
IO=20µA - - 0.1 V
IO= 6.0 mA - - 0.4 V
ILI input leakage current VI=V
CC or GND; VCC = 5.5 V - - ±1.0 µA
IOZ OFF-state output current VI=V
IH or VIL; VCC = 5.5 V;
VO=V
CC or GND per input pin;
other inputs at VCC or GND; IO=0A
--±10 µA
Table 8: Static characteristics type 74HCT245
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 10 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
11. Dynamic characteristics
ICC quiescent supply current VI=V
CC or GND; IO=0A;
VCC = 5.5 V - - 160 µA
∆ICC additional quiescent supply
current per input pin VI=V
CC −2.1 V; other inputs at
VI=V
CC or GND;
VCC = 4.5 V to 5.5 V; IO=0A
An or Bn inputs - - 196 µA
OE input - - 735 µA
DIR input - - 441 µA
Table 8: Static characteristics type 74HCT245
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Typ Max Unit
Table 9: Dynamic characteristics type 74HC245
GND = 0 V; test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
Tamb = 25 °C
tPHL, tPLH propagation delay An to Bn or Bn
to An see Figure 5
VCC = 2.0 V - 25 90 ns
VCC = 4.5 V - 9 18 ns
VCC = 5.0 V; CL=15pF - 7 - ns
VCC = 6.0 V - 7 15 ns
tPZH, tPZL 3-state output enable time OE to
An or OE to Bn see Figure 6
VCC = 2.0 V - 30 150 ns
VCC = 4.5 V - 11 30 ns
VCC = 6.0 V - 9 26 ns
tPHZ, tPLZ 3-state output disable time OE to
An or OE to Bn see Figure 6
VCC = 2.0 V - 41 150 ns
VCC = 4.5 V - 15 30 ns
VCC = 6.0 V - 12 26 ns
tTHL, tTLH output transition time see Figure 5
VCC = 2.0 V - 14 60 ns
VCC = 4.5 V - 5 12 ns
VCC = 6.0 V - 4 10 ns
CPD power dissipation capacitance
per transceiver VI= GND to VCC [1] -30-pF
Tamb = −40 °C to +85 °C
tPHL, tPLH propagation delay An to Bn or Bn
to An see Figure 5
VCC = 2.0 V - - 115 ns
VCC = 4.5 V - - 23 ns
VCC = 6.0 V - - 20 ns
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 11 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
[1] CPD is used to determine the dynamic power dissipation (PD in µW):
PD=C
PD ×VCC2×fi×N+∑ (CL×VCC2×fo) where:
fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑(CL×VCC2×fo) = sum of outputs.
tPZH, tPZL 3-state output enable time OE to
An or OE to Bn see Figure 6
VCC = 2.0 V - - 190 ns
VCC = 4.5 V - - 38 ns
VCC = 6.0 V - - 33 ns
tPHZ, tPLZ 3-state output disable time OE to
An or OE to Bn see Figure 6
VCC = 2.0 V - - 190 ns
VCC = 4.5 V - - 38 ns
VCC = 6.0 V - - 33 ns
tTHL, tTLH output transition time see Figure 5
VCC = 2.0 V - - 75 ns
VCC = 4.5 V - - 15 ns
VCC = 6.0 V - - 13 ns
Tamb = −40 °C to +125 °C
tPHL, tPLH propagation delay An to Bn or Bn
to An see Figure 5
VCC = 2.0 V - - 135 ns
VCC = 4.5 V - - 27 ns
VCC = 6.0 V - - 23 ns
tPZH, tPZL 3-state output enable time OE to
An or OE to Bn see Figure 6
VCC = 2.0 V - - 225 ns
VCC = 4.5 V - - 45 ns
VCC = 6.0 V - - 38 ns
tPHZ, tPLZ 3-state output disable time OE to
An or OE to Bn see Figure 6
VCC = 2.0 V - - 225 ns
VCC = 4.5 V - - 45 ns
VCC = 6.0 V - - 38 ns
tTHL, tTLH output transition time see Figure 5
VCC = 2.0 V - - 90 ns
VCC = 4.5 V - - 18 ns
VCC = 6.0 V - - 15 ns
Table 9: Dynamic characteristics type 74HC245
…continued
GND = 0 V; test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 12 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
[1] CPD is used to determine the dynamic power dissipation (PD in µW):
PD=C
PD ×VCC2×fi×N+∑ (CL×VCC2×fo) where:
fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑(CL×VCC2×fo) = sum of outputs.
Table 10: Dynamic characteristics type 74HCT245
GND = 0 V; test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
Tamb = 25 °C
tPHL, tPLH propagation delay An to Bn or Bn
to An see Figure 5
VCC = 4.5 V - 12 22 ns
VCC = 5.0 V; CL=15pF - 10 - ns
tPZH, tPZL 3-state output enable time OE to
An or OE to Bn VCC = 4.5 V; see Figure 6 - 1630ns
tPHZ, tPLZ 3-state output disable time OE to
An or OE to Bn VCC = 4.5 V; see Figure 6 - 1630ns
tTHL, tTLH output transition time VCC = 4.5 V; see Figure 5 - 5 12 ns
CPD power dissipation capacitance
per transceiver VI= GND to VCC −1.5 V [1] -30-pF
Tamb = −40 °C to +85 °C
tPHL, tPLH propagation delay An to Bn or Bn
to An VCC = 4.5 V; see Figure 5 --28ns
tPZH, tPZL 3-state output enable time OE to
An or OE to Bn VCC = 4.5 V; see Figure 6 --38ns
tPHZ, tPLZ 3-state output disable time OE to
An or OE to Bn VCC = 4.5 V; see Figure 6 --38ns
tTHL, tTLH output transition time VCC = 4.5 V; see Figure 5 --15ns
Tamb = −40 °C to +125 °C
tPHL, tPLH propagation delay An to Bn or Bn
to An VCC = 4.5 V; see Figure 5 --33ns
tPZH, tPZL 3-state output enable time OE to
An or OE to Bn VCC = 4.5 V; see Figure 6 --45ns
tPHZ, tPLZ 3-state output disable time OE to
An or OE to Bn VCC = 4.5 V; see Figure 6 --45ns
tTHL, tTLH output transition time VCC = 4.5 V; see Figure 5 --18ns
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 13 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
12. Waveforms
Measurement points are given in Table 11.
VOL and VOH are typical voltage output drop that occur with the output load.
Fig 5. Input (An, Bn) to output (Bn, An) propagation delays and output transition times
Measurement points are given in Table 11.
VOL and VOH are typical voltage output drop that occur with the output load.
Fig 6. 3-state output enable and disable times
Table 11: Measurement points
Type Input Output
VMVM
74HC245 0.5VCC 0.5VCC
74HCT245 1.3 V 1.3 V
001aac433
tPLH
tPHL
VM
VM
90 %
10 %
VMVM
Bn, An output
An, Bn input
VI
GND
VOH
VOL
tTLH
tTHL
001aac479
tPLZ
tPHZ
outputs
disabled outputs
enabled
90 %
10 %
outputs
enabled
OE input
VI
VCC
VOL
VOH
GND
GND
VM
tPZL
tPZH
VM
VM
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
trtf
90 %
10 %
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 14 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
Test data is given in Table 12.
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 resistor.
Fig 7. Load circuitry for switching times
Table 12: Test data
Type Input Test
VItr, tftPHL, tPLH tPZH, tPHZ tPZL, tPLZ
74HC245 VCC 6 ns open GND VCC
74HCT245 3 V 6 ns open GND VCC
mgk563
D.U.T
VCC VCC
VIVO
RT
RL = 1 kΩ
CL50 pF
open
PULSE
GENERATOR
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 15 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
13. Package outline
Fig 8. Package outline SOT146-1 (DIP20)
UNIT A
max. 1 2 b1cD E e M
H
L
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm
inches
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
SOT146-1 99-12-27
03-02-13
A
min. A
max. bZ
max.
w
ME
e1
1.73
1.30 0.53
0.38 0.36
0.23 26.92
26.54 6.40
6.22 3.60
3.05 0.2542.54 7.62 8.25
7.80 10.0
8.3 24.2 0.51 3.2
0.068
0.051 0.021
0.015 0.014
0.009 1.060
1.045 0.25
0.24 0.14
0.12 0.010.1 0.3 0.32
0.31 0.39
0.33 0.0780.17 0.02 0.13
SC-603MS-001
MH
c
(e )
1
ME
A
L
seating plane
A1
wM
b1
e
D
A2
Z
20
1
11
10
b
E
pin 1 index
0 5 10 mm
scale
Note
1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
(1)
(1) (1)
DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 16 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
Fig 9. Package outline SOT163-1 (SO20)
UNIT A
max. A1A2A3bpcD
(1) E(1) (1)
eH
ELL
pQZ
ywv θ
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm
inches
2.65 0.3
0.1 2.45
2.25 0.49
0.36 0.32
0.23 13.0
12.6 7.6
7.4 1.27 10.65
10.00 1.1
1.0 0.9
0.4 8
0
o
o
0.25 0.1
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
1.1
0.4
SOT163-1
10
20
wM
bp
detail X
Z
e
11
1
D
y
0.25
075E04 MS-013
pin 1 index
0.1 0.012
0.004 0.096
0.089 0.019
0.014 0.013
0.009 0.51
0.49 0.30
0.29 0.05
1.4
0.055
0.419
0.394 0.043
0.039 0.035
0.016
0.01
0.25
0.01 0.004
0.043
0.016
0.01
0 5 10 mm
scale
X
θ
A
A1
A2
HE
Lp
Q
E
c
L
vMA
(A )
3
A
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
99-12-27
03-02-19
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 17 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
Fig 10. Package outline SOT339-1 (SSOP20)
UNIT A1A2A3bpcD
(1) E(1) eH
ELL
pQ(1)
Zywv θ
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm 0.21
0.05 1.80
1.65 0.38
0.25 0.20
0.09 7.4
7.0 5.4
5.2 0.65 7.9
7.6 0.9
0.7 0.9
0.5 8
0
o
o
0.131.25 0.2 0.1
DIMENSIONS (mm are the original dimensions)
Note
1. Plastic or metal protrusions of 0.2 mm maximum per side are not included.
1.03
0.63
SOT339-1 MO-150 99-12-27
03-02-19
X
wM
θ
A
A1
A2
bp
D
HE
Lp
Q
detail X
E
Z
e
c
L
vMA
(A )
3
A
110
20 11
y
0.25
pin 1 index
0 2.5 5 mm
scale
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1
A
max.
2
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 18 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
Fig 11. Package outline SOT360-1 (TSSOP20)
UNIT A1A2A3bpcD
(1) E(2) (1)
eH
ELL
pQZywv θ
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm 0.15
0.05 0.95
0.80 0.30
0.19 0.2
0.1 6.6
6.4 4.5
4.3 0.65 6.6
6.2 0.4
0.3 0.5
0.2 8
0
o
o
0.13 0.10.21
DIMENSIONS (mm are the original dimensions)
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
0.75
0.50
SOT360-1 MO-153 99-12-27
03-02-19
wM
bp
D
Z
e
0.25
110
20 11
pin 1 index
θ
A
A1
A2
Lp
Q
detail X
L
(A )
3
HE
E
c
vMA
X
A
y
0 2.5 5 mm
scale
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1
A
max.
1.1
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 19 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
Fig 12. Package outline SOT764-1 (DHVQFN20)
terminal 1
index area
0.51
A1Eh
b
UNIT ye
0.2
c
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm 4.6
4.4
Dh
3.15
2.85
y1
2.6
2.4 1.15
0.85
e1
3.5
0.30
0.18
0.05
0.00 0.05 0.1
DIMENSIONS (mm are the original dimensions)
SOT764-1 MO-241 - - -- - -
0.5
0.3
L
0.1
v
0.05
w
0 2.5 5 mm
scale
SOT764-1
DHVQFN20: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;
20 terminals; body 2.5 x 4.5 x 0.85 mm
A(1)
max.
AA1c
detail X
y
y1C
e
L
Eh
Dh
e
e1
b
29
19 12
11
10
1
20
X
D
E
C
BA
terminal 1
index area
AC
CB
vM
wM
E(1)
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
D(1)
02-10-17
03-01-27
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 20 of 22
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
14. Revision history
Table 13: Revision history
Document ID Release
date Data sheet status Change
notice Doc. number Supersedes
74HC_HCT245_3 20050131 Product data sheet - 9397 750 14502 74HC_HCT245_CNV_2
Modifications: •The format of this data sheet is redesigned to comply with the new presentation and
information standard of Philips Semiconductors
•Section 4 “Ordering information”,Section 6 “Pinning information” and Section 13 “Package
outline” are modified to include the DHVQFN20 package.
74HC_HCT245_CNV_2 19930930 Product specification - - -
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 21 of 22
15. Data sheet status
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at
URL http://www.semiconductors.philips.com.
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
16. Definitions
Short-form specification — The data in a short-form specification is
extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with
the Absolute Maximum Rating System (IEC 60134). Stress above one or
more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at these or at any
other conditions above those given in the Characteristics sections of the
specification is not implied. Exposure to limiting values for extended periods
may affect device reliability.
Application information — Applications that are described herein for any
of these products are for illustrative purposes only. Philips Semiconductors
make no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.
17. Disclaimers
Life support — These products are not designed for use in life support
appliances, devices, or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors
customers using or selling these products for use in such applications do so
at their own risk and agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to
make changes in the products - including circuits, standard cells, and/or
software - described or contained herein in order to improve design and/or
performance. When the product is in full production (status ‘Production’),
relevant changes will be communicated via a Customer Product/Process
Change Notification (CPCN). Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no
license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are
free from patent, copyright, or mask work right infringement, unless otherwise
specified.
18. Contact information
For additional information, please visit: http://www.semiconductors.philips.com
For sales office addresses, send an email to: sales.addresses@www.semiconductors.philips.com
Level Data sheet status[1] Product status[2] [3] Definition
I Objective data Development This data sheet contains data from the objective specification for product development. Philips
Semiconductors reserves the right to change the specification in any manner without notice.
II Preliminary data Qualification This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III Product data Production This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
© Koninklijke Philips Electronics N.V. 2005
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner. The information presented in this document does
not form part of any quotation or contract, is believed to be accurate and reliable and may
be changed without notice. No liability will be accepted by the publisher for any
consequence of its use. Publication thereof does not convey nor imply any license under
patent- or other industrial or intellectual property rights.Date of release: 31 January 2005
Document number: 9397 750 14502
Published in The Netherlands
Philips Semiconductors 74HC245; 74HCT245
Octal bus tranceiver; 3-state
19. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Quick reference data . . . . . . . . . . . . . . . . . . . . . 1
4 Ordering information. . . . . . . . . . . . . . . . . . . . . 2
5 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 3
6 Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
7 Functional description . . . . . . . . . . . . . . . . . . . 5
7.1 Function table. . . . . . . . . . . . . . . . . . . . . . . . . . 5
8 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5
9 Recommended operating conditions. . . . . . . . 6
10 Static characteristics. . . . . . . . . . . . . . . . . . . . . 6
11 Dynamic characteristics . . . . . . . . . . . . . . . . . 10
12 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 15
14 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 20
15 Data sheet status. . . . . . . . . . . . . . . . . . . . . . . 21
16 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
17 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
18 Contact information . . . . . . . . . . . . . . . . . . . . 21
