74HC245; 74HCT245
Octal bus tranceiver; 3-state
Rev. 03 — 31 January 2005 Product data sheet
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
Table 1: Quick reference data
GND = 0 V; T
Symbol Parameter Conditions Min Typ Max Unit
Type 74HC245
, t
t
PHL
C
I
C
I/O
C
PD
Type 74HCT245
, t
t
PHL
amb
propagation delay
PLH
An to Bn or Bn to An
input capacitance - 3.5 - pF
input/output capacitance - 10 - pF
power dissipation
capacitance per
transceiver
propagation delay
PLH
An to Bn or Bn to An
=25°C; tr=tf= 6 ns.
CL=15pF;
V
=5V
CC
VI= GND to V
CL=15pF;
V
=5V
CC
CC
-7-ns
[1]
-30-pF
-10-ns
Philips Semiconductors
74HC245; 74HCT245
Octal bus tranceiver; 3-state
Table 1: Quick reference data
GND = 0 V; T
=25°C; tr=tf= 6 ns.
amb
…continued
Symbol Parameter Conditions Min Typ Max Unit
C
I
C
I/O
C
PD
input capacitance - 3.5 - pF
input/output capacitance - 10 - pF
power dissipation
capacitance per
VI= GND to
V
− 1.5 V
CC
[1]
-30-pF
transceiver
[1] CPDis used to determine the dynamic power dissipation (PD in µW):
PD=CPD× V
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× V
2
× fi× N+∑ (CL× V
CC
2
× fo) = sum of outputs.
CC
2
× fo) where:
CC
4. Ordering information
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
74HC245PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
74HC245DB −40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
74HC245BQ −40 °C to +125 °C DHVQFN20 plastic dual-in-line compatible thermal enhanced
very thin quad flat packageno leads; 20 terminals;
body 2.5 × 4.5 × 0.85 mm
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
74HCT245PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
74HCT245DB −40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
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
SOT163-1
SOT360-1
SOT339-1
SOT764-1
SOT163-1
SOT360-1
SOT339-1
SOT764-1
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
5. Functional diagram
DIR
1
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
OE
B0
B1
B2
B3
B4
B5
B6
B7
mna174
74HC245; 74HCT245
Octal bus tranceiver; 3-state
19
19
18
17
16
15
14
13
12
11
G3
1
3EN1
3EN2
1
2
4
5
6
7
8
2
mna175
18
173
16
15
14
13
12
119
Fig 1. Logic symbol Fig 2. IEC logic symbol
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
6. Pinning information
6.1 Pinning
74HC245; 74HCT245
Octal bus tranceiver; 3-state
1
DIR V
2
A0 OE
3
A1 B0
4
A2 B1
5
A3 B2
6
A4 B3
7
A5 B4
8
A6 B5
9
A7 B6
10
GND B7
Fig 3. Pin configuration DIP20, SO20,
SSOP20 and TSSOP20
6.2 Pin description
245
001aac431
terminal 1
index area
2 19
A0 OE
3 18
A1 B0
20
CC
19
18
17
16
15
14
13
12
11
4 17
A2 B1
5 16
A3 B2
6 15
A4 B3
7 14
A5 B4
8 13
A6
9
A7
Transparent top view
DIR
1
245
GND
10
GND
CC
V
20
(1)
11
B7
12
001aac432
B5
B6
(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 4. Pin configuration DHVQFN20
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 4 of 22
Philips Semiconductors
74HC245; 74HCT245
Octal bus tranceiver; 3-state
Table 3: Pin description
Symbol Pin Description
B1 17 data input/output
B0 18 data input/output
OE 19 output enable input (active LOW)
V
CC
7. Functional description
7.1 Function table
Table 4: Function table
Input Input/output
OE DIR An Bn
L L A = B input
L H input B = A
HXZZ
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
…continued
20 supply voltage
[1]
8. Limiting values
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
V
CC
I
IK
I
OK
I
O
, I
I
CC
T
stg
P
tot
[1] For DIP20 packages: above 70 °C, P
For SO20 packages: above 70 °C, P
For SSOP20 and TSSOP20 packages: above 60 °C, P
For DHVQFN20 packages: above 60 °C, P
supply voltage −0.5 +7 V
input diode current VI < −0.5 V or VI>VCC+ 0.5 V - ±20 mA
output diode current VO< −0.5 V or
output source or sink
V
O>VCC
VO = −0.5 V to VCC+ 0.5 V - ±35 mA
+ 0.5 V
- ±20 mA
current
GNDVCC
or GND current - ±70 mA
storage temperature −65 +150 °C
total power dissipation
[1]
DIP20 package - 750 mW
SO20, SSOP20,
- 500 mW
TSSOP20 and
DHVQFN20 packages
derates linearly with 12 mW/K.
tot
derates linearly with 8 mW/K.
tot
derates linearly with 5.5 mW/K.
tot
derates linearly with 4.5 mW/K.
tot
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
9. Recommended operating conditions
Table 6: Recommended operating conditions
Symbol Parameter Conditions Min Typ Max Unit
Type 74HC245
V
CC
V
I
V
O
, t
t
r
f
T
amb
Type 74HCT245
V
CC
V
I
V
O
, t
t
r
f
T
amb
supply voltage 2.0 5.0 6.0 V
input voltage 0 - V
output voltage 0 - V
input rise and fall
times
VCC = 2.0 V - - 1000 ns
= 4.5 V - 6.0 500 ns
V
CC
= 6.0 V - - 400 ns
V
CC
ambient temperature −40 - +125 °C
supply voltage 4.5 5.0 5.5 V
input voltage 0 - V
output voltage 0 - V
input rise and fall
VCC = 4.5 V - 6.0 500 ns
times
ambient temperature −40 - +125 °C
74HC245; 74HCT245
Octal bus tranceiver; 3-state
V
CC
V
CC
V
CC
V
CC
10. Static characteristics
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
=25°C
T
amb
V
IH
V
IL
V
OH
HIGH-level input voltage VCC= 2.0 V 1.5 1.2 - V
= 4.5 V 3.15 2.4 - V
V
CC
= 6.0 V 4.2 3.2 - V
V
CC
LOW-level input voltage VCC= 2.0 V - 0.8 0.5 V
= 4.5 V - 2.1 1.35 V
V
CC
= 6.0 V - 2.8 1.8 V
V
CC
HIGH-level output voltage VI=VIHor V
IL
IO= −20 µA; VCC= 2.0 V 1.9 2.0 - V
= −20 µA; VCC= 4.5 V 4.4 4.5 - V
I
O
= −20 µA; VCC= 6.0 V 5.9 6.0 - V
I
O
= −6.0 mA; VCC= 4.5 V 3.98 4.32 - V
I
O
= −7.8 mA; VCC= 6.0 V 5.48 5.81 - V
I
O
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
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
V
OL
LOW-level output voltage VI=VIHor V
IL
IO=20µA; VCC= 2.0 V - 0 0.1 V
=20µA; VCC= 4.5 V - 0 0.1 V
I
O
=20µA; VCC= 6.0 V - 0 0.1 V
I
O
= 6.0 mA; VCC= 4.5 V - 0.15 0.26 V
I
O
= 7.8 mA; VCC= 6.0 V - 0.16 0.26 V
I
O
I
I
I
C
C
T
V
V
V
LI
OZ
CC
I
I/O
amb
IH
IL
OH
input leakage current VI=VCCor GND; VCC= 6.0 V - - ±0.1 µA
OFF-state output current VI=VIHor VIL; VO=VCCor GND;
V
= 6.0 V
CC
quiescent supply current VI=VCCor GND; IO=0A;
V
= 6.0 V
CC
--±0.5 µA
- - 8.0 µA
input capacitance - 3.5 - pF
input/output capacitance - 10 - pF
= −40 °C to +85 °C
HIGH-level input voltage VCC= 2.0 V 1.5 - - V
= 4.5 V 3.15 - - V
V
CC
= 6.0 V 4.2 - - V
V
CC
LOW-level input voltage VCC= 2.0 V - - 0.5 V
= 4.5 V - - 1.35 V
V
CC
= 6.0 V - - 1.8 V
V
CC
HIGH-level output voltage VI=VIHor V
IL
IO= −20 µA; VCC= 2.0 V 1.9 - - V
= −20 µA; VCC= 4.5 V 4.4 - - V
I
O
= −20 µA; VCC= 6.0 V 5.9 - - V
I
O
= −6.0 mA; VCC= 4.5 V 3.84 - - V
I
O
= −7.8 mA; VCC= 6.0 V 5.34 - - V
I
O
V
OL
LOW-level output voltage VI=VIHor V
IL
IO=20µA; VCC= 2.0 V - - 0.1 V
=20µA; VCC= 4.5 V - - 0.1 V
I
O
=20µA; VCC= 6.0 V - - 0.1 V
I
O
= 6.0 mA; VCC= 4.5 V - - 0.33 V
I
O
= 7.8 mA; VCC= 6.0 V - - 0.33 V
I
O
I
I
I
T
V
LI
OZ
CC
amb
IH
input leakage current VI=VCCor GND; VCC= 6.0 V - - ±1.0 µA
OFF-state output current VI=VIHor VIL; VO=VCCor GND;
V
= 6.0 V
CC
quiescent supply current VI=VCCor GND; IO=0A;
V
= 6.0 V
CC
--±5.0 µA
--80µA
= −40 °C to +125 °C
HIGH-level input voltage VCC= 2.0 V 1.5 - - V
= 4.5 V 3.15 - - V
V
CC
= 6.0 V 4.2 - - V
V
CC
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
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
V
IL
V
OH
V
OL
I
LI
I
OZ
I
CC
LOW-level input voltage VCC= 2.0 V - - 0.5 V
= 4.5 V - - 1.35 V
V
CC
= 6.0 V - - 1.8 V
V
CC
HIGH-level output voltage VI=VIHor V
= −20 µA; VCC= 2.0 V 1.9 - - V
I
O
= −20 µA; VCC= 4.5 V 4.4 - - V
I
O
= −20 µA; VCC= 6.0 V 5.9 - - V
I
O
= −6.0 mA; VCC= 4.5 V 3.7 - - V
I
O
= −7.8 mA; VCC= 6.0 V 5.2 - - V
I
O
LOW-level output voltage VI=VIHor V
=20µA; VCC= 2.0 V - - 0.1 V
I
O
=20µA; VCC= 4.5 V - - 0.1 V
I
O
=20µA; VCC= 6.0 V - - 0.1 V
I
O
= 6.0 mA; VCC= 4.5 V - - 0.4 V
I
O
= 7.8 mA; VCC= 6.0 V - - 0.4 V
I
O
IL
IL
-
-
input leakage current VI=VCCor GND; VCC= 6.0 V - - ±1.0 µA
OFF-state output current VI=VIHor VIL; VO=VCCor GND;
V
= 6.0 V
CC
quiescent supply current VI=VCCor GND; IO=0A;
V
= 6.0 V
CC
--±10.0 µA
- - 160 µA
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
=25°C
T
amb
V
IH
V
IL
V
OH
V
OL
I
LI
I
OZ
I
CC
HIGH-level input voltage VCC= 4.5 V to 5.5 V 2.0 1.6 - V
LOW-level input voltage VCC= 4.5 V to 5.5 V - 1.2 0.8 V
HIGH-level output voltage VI=VIHor VIL; VCC= 4.5 V
= −20 µA 4.4 4.5 - V
I
O
= −6 mA 3.98 4.32 - V
I
O
LOW-level output voltage VI=VIHor VIL; VCC= 4.5 V
=20µA - 0 0.1 V
I
O
= 6.0 mA - 0.15 0.26 V
I
O
input leakage current VI=VCCor GND; VCC= 5.5 V - - ±0.1 µA
OFF-state output current VI=VIHor VIL; VCC= 5.5 V;
V
O=VCC
other inputs at V
or GND per input pin;
or GND; IO=0A
CC
quiescent supply current VI=VCCor GND; IO=0A;
V
= 5.5 V
CC
--±0.5 µA
- - 8.0 µA
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
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
∆I
CC
additional quiescent supply
current per input pin
VI=VCC− 2.1 V; other inputs at
V
I=VCC
V
CC
or GND;
= 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
C
C
T
V
V
V
V
I
I
I
∆I
I
I/O
amb
IH
IL
OH
OL
LI
OZ
CC
CC
input capacitance - 3.5 - pF
input/output capacitance - 10 - pF
= −40 °C to +85 °C
HIGH-level input voltage VCC= 4.5 V to 5.5 V 2.0 - - V
LOW-level input voltage VCC= 4.5 V to 5.5 V - - 0.8 V
HIGH-level output voltage VI=VIHor VIL; VCC= 4.5 V
= −20 µA 4.4 - - V
I
O
= −6 mA 3.84 - - V
I
O
LOW-level output voltage VI=VIHor VIL; VCC= 4.5 V
=20µA - - 0.1 V
I
O
= 6.0 mA - - 0.33 V
I
O
input leakage current VI=VCCor GND; VCC= 5.5 V - - ±1.0 µA
OFF-state output current VI=VIHor VIL; VCC= 5.5 V;
V
O=VCC
other inputs at V
or GND per input pin;
or GND; IO=0A
CC
quiescent supply current VI=VCCor GND; IO=0A;
V
= 5.5 V
CC
additional quiescent supply
current per input pin
VI=VCC− 2.1 V; other inputs at
V
I=VCC
V
CC
or GND;
= 4.5 V to 5.5 V; IO=0A
--±5.0 µA
--80µA
An or Bn inputs - - 180 µA
OE input - - 675 µA
DIR input - - 405 µA
= −40 °C to +125 °C
T
amb
V
IH
V
IL
V
OH
V
OL
I
LI
I
OZ
HIGH-level input voltage VCC= 4.5 V to 5.5 V 2.0 - - V
LOW-level input voltage VCC= 4.5 V to 5.5 V - - 0.8 V
HIGH-level output voltage VI=VIHor VIL; VCC= 4.5 V
= −20 µA 4.4 - - V
I
O
= −6 mA 3.7 - - V
I
O
LOW-level output voltage VI=VIHor VIL; VCC= 4.5 V
=20µA - - 0.1 V
I
O
= 6.0 mA - - 0.4 V
I
O
input leakage current VI=VCCor GND; VCC= 5.5 V - - ±1.0 µA
OFF-state output current VI=VIHor VIL; VCC= 5.5 V;
V
O=VCC
other inputs at V
or GND per input pin;
or GND; IO=0A
CC
--±10 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
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
I
∆I
CC
CC
quiescent supply current VI=VCCor GND; IO=0A;
V
= 5.5 V
CC
additional quiescent supply
current per input pin
VI=VCC− 2.1 V; other inputs at
V
I=VCC
V
CC
or GND;
= 4.5 V to 5.5 V; IO=0A
- - 160 µA
An or Bn inputs - - 196 µA
OE input - - 735 µA
DIR input - - 441 µA
11. Dynamic characteristics
Table 9: Dynamic characteristics type 74HC245
GND = 0 V; test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
= 25 °C
T
amb
, t
t
PHL
, t
t
PZH
, t
t
PHZ
, t
t
THL
C
PD
= −40 °C to +85 °C
T
amb
, t
t
PHL
propagation delay An to Bn or Bn
PLH
to An
3-state output enable time OE to
PZL
An or
OE to Bn
3-state output disable time OE to
PLZ
An or
OE to Bn
output transition time see Figure 5
TLH
power dissipation capacitance
per transceiver
propagation delay An to Bn or Bn
PLH
to An
see Figure 5
= 2.0 V - 25 90 ns
V
CC
= 4.5 V - 9 18 ns
V
CC
= 5.0 V; CL=15pF - 7 - ns
V
CC
= 6.0 V - 7 15 ns
V
CC
Figure 6
see
= 2.0 V - 30 150 ns
V
CC
= 4.5 V - 11 30 ns
V
CC
= 6.0 V - 9 26 ns
V
CC
Figure 6
see
= 2.0 V - 41 150 ns
V
CC
= 4.5 V - 15 30 ns
V
CC
= 6.0 V - 12 26 ns
V
CC
= 2.0 V - 14 60 ns
V
CC
= 4.5 V - 5 12 ns
V
CC
= 6.0 V - 4 10 ns
V
CC
VI= GND to V
CC
[1]
-30-pF
see Figure 5
= 2.0 V - - 115 ns
V
CC
= 4.5 V - - 23 ns
V
CC
= 6.0 V - - 20 ns
V
CC
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
Table 9: Dynamic characteristics type 74HC245
…continued
GND = 0 V; test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
t
, t
PZH
, t
t
PHZ
, t
t
THL
= −40 °C to +125 °C
T
amb
, t
t
PHL
, t
t
PZH
, t
t
PHZ
, t
t
THL
3-state output enable time OE to
PZL
An or
OE to Bn
3-state output disable time OE to
PLZ
An or
OE to Bn
output transition time see Figure 5
TLH
propagation delay An to Bn or Bn
PLH
to An
3-state output enable time OE to
PZL
An or
OE to Bn
3-state output disable time OE to
PLZ
An or
OE to Bn
output transition time see Figure 5
TLH
Figure 6
see
= 2.0 V - - 190 ns
V
CC
= 4.5 V - - 38 ns
V
CC
= 6.0 V - - 33 ns
V
CC
Figure 6
see
= 2.0 V - - 190 ns
V
CC
= 4.5 V - - 38 ns
V
CC
= 6.0 V - - 33 ns
V
CC
= 2.0 V - - 75 ns
V
CC
= 4.5 V - - 15 ns
V
CC
= 6.0 V - - 13 ns
V
CC
see Figure 5
= 2.0 V - - 135 ns
V
CC
= 4.5 V - - 27 ns
V
CC
= 6.0 V - - 23 ns
V
CC
Figure 6
see
= 2.0 V - - 225 ns
V
CC
= 4.5 V - - 45 ns
V
CC
= 6.0 V - - 38 ns
V
CC
Figure 6
see
= 2.0 V - - 225 ns
V
CC
= 4.5 V - - 45 ns
V
CC
= 6.0 V - - 38 ns
V
CC
= 2.0 V - - 90 ns
V
CC
= 4.5 V - - 18 ns
V
CC
= 6.0 V - - 15 ns
V
CC
[1] CPDis used to determine the dynamic power dissipation (PD in µW):
PD=CPD× V
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× V
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 11 of 22
2
× fi× N+∑ (CL× V
CC
2
× fo) = sum of outputs.
CC
2
× fo) where:
CC
Philips Semiconductors
74HC245; 74HCT245
Octal bus tranceiver; 3-state
Table 10: Dynamic characteristics type 74HCT245
GND = 0 V; test circuit see Figure 7.
Symbol Parameter Conditions Min Typ Max Unit
= 25 °C
T
amb
, t
t
PHL
, t
t
PZH
, t
t
PHZ
, t
t
THL
C
PD
= −40 °C to +85 °C
T
amb
, t
t
PHL
, t
t
PZH
, t
t
PHZ
, t
t
THL
= −40 °C to +125 °C
T
amb
, t
t
PHL
, t
t
PZH
, t
t
PHZ
, t
t
THL
propagation delay An to Bn or Bn
PLH
to An
3-state output enable time OE to
PZL
An or
OE to Bn
3-state output disable time OE to
PLZ
An or
OE to Bn
output transition time VCC = 4.5 V; see Figure 5 - 5 12 ns
TLH
power dissipation capacitance
see Figure 5
= 4.5 V - 12 22 ns
V
CC
= 5.0 V; CL=15pF - 10 - ns
V
CC
= 4.5 V; see Figure 6 - 1630ns
V
CC
= 4.5 V; see Figure 6 - 1630ns
V
CC
VI= GND to VCC− 1.5 V
[1]
-30-pF
per transceiver
propagation delay An to Bn or Bn
PLH
VCC = 4.5 V; see Figure 5 --28ns
to An
3-state output enable time OE to
PZL
An or
OE to Bn
3-state output disable time OE to
PLZ
An or
OE to Bn
output transition time VCC = 4.5 V; see Figure 5 --15ns
TLH
propagation delay An to Bn or Bn
PLH
= 4.5 V; see Figure 6 --38ns
V
CC
= 4.5 V; see Figure 6 --38ns
V
CC
VCC = 4.5 V; see Figure 5 --33ns
to An
3-state output enable time OE to
PZL
An or
OE to Bn
3-state output disable time OE to
PLZ
An or
OE to Bn
output transition time VCC = 4.5 V; see Figure 5 --18ns
TLH
= 4.5 V; see Figure 6 --45ns
V
CC
= 4.5 V; see Figure 6 --45ns
V
CC
[1] CPDis used to determine the dynamic power dissipation (PD in µW):
PD=CPD× V
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× V
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 12 of 22
2
× fi× N+∑ (CL× V
CC
2
× fo) = sum of outputs.
CC
2
× fo) where:
CC
Philips Semiconductors
12. Waveforms
Fig 5. Input (An, Bn) to output (Bn, An) propagation delays and output transition times
74HC245; 74HCT245
Octal bus tranceiver; 3-state
V
I
An, Bn input
GND
V
Bn, An output
V
OH
OL
V
M
t
PHL
V
M
t
THL
Measurement points are given in Table 11.
VOL and VOH are typical voltage output drop that occur with the output load.
10 %
V
M
t
PLH
90 %
V
M
t
TLH
001aac433
OE input
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
GND
V
CC
V
OL
V
OH
GND
V
I
10 %
90 %
V
M
outputs
enabled
t
t
r
PLZ
t
PHZ
10 %
90 %
outputs
disabled
t
PZL
t
PZH
t
f
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
V
M
74HC245 0.5V
CC
V
M
0.5V
74HCT245 1.3 V 1.3 V
CC
V
M
V
M
outputs
enabled
001aac479
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
V
mgk563
CC
open
PULSE
GENERATOR
V
CC
V
I
D.U.T
R
T
V
RL = 1 kΩ
O
C
50 pF
L
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
74HC245 V
V
I
CC
tr, t
f
t
PHL
, t
PLH
t
PZH
, t
PHZ
6 ns open GND V
74HCT245 3 V 6 ns open GND V
t
PZL
CC
CC
, t
PLZ
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
13. Package outline
74HC245; 74HCT245
Octal bus tranceiver; 3-state
DIP20: plastic dual in-line package; 20 leads (300 mil)
D
seating plane
L
Z
20
pin 1 index
e
b
SOT146-1
M
E
A
2
A
A
1
w M
b
1
11
E
c
(e )
1
M
H
1
0 5 10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
UNIT
mm
inches
Note
1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
max.
OUTLINE
VERSION
SOT146-1
A
min.
A
1 2
max.
IEC JEDEC JEITA
b
1.73
1.30
0.068
0.051
b
1
0.53
0.38
0.021
0.015
REFERENCES
cD E e M
0.36
0.23
0.014
0.009
(1) (1)
26.92
26.54
1.060
1.045
SC-603MS-001
6.40
6.22
0.25
0.24
10
(1)
1
3.60
8.25
3.05
7.80
0.14
0.32
0.12
0.31
EUROPEAN
PROJECTION
H
E
10.0
0.2542.54 7.62
8.3
0.39
0.010.1 0.3
0.33
ISSUE DATE
M
L
e
w
99-12-27
03-02-13
Z
max.
24.2 0.51 3.2
0.0780.17 0.02 0.13
Fig 8. Package outline SOT146-1 (DIP20)
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
SO20: plastic small outline package; 20 leads; body width 7.5 mm
D
c
y
Z
20
pin 1 index
1
e
11
A
2
10
w M
b
p
SOT163-1
E
H
E
Q
A
1
L
p
L
detail X
(A )
A
X
v M
A
A
3
θ
0 5 10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
mm
OUTLINE
VERSION
SOT163-1
A
max.
2.65
0.1
A1A2A
0.3
2.45
0.1
2.25
0.012
0.096
0.004
0.089
IEC JEDEC JEITA
075E04 MS-013
0.25
0.01
b
3
p
0.49
0.32
0.36
0.23
0.019
0.013
0.014
0.009
UNIT
inches
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
(1)E(1) (1)
cD
13.0
12.6
0.51
0.49
REFERENCES
eHELLpQ
7.6
7.4
0.30
0.29
1.27
0.05
10.65
10.00
0.419
0.394
1.4
0.055
1.1
0.4
0.043
0.016
1.1
1.0
0.043
0.039
0.25
0.25 0.1
0.01
0.01
EUROPEAN
PROJECTION
ywv θ
Z
0.9
0.4
0.035
0.004
0.016
ISSUE DATE
99-12-27
03-02-19
o
8
o
0
Fig 9. Package outline SOT163-1 (SO20)
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
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
D
y
Z
20 11
pin 1 index
c
A
2
A
1
E
H
E
SOT339-1
A
X
v M
A
Q
(A )
L
p
L
A
3
θ
110
w M
b
e
DIMENSIONS (mm are the original dimensions)
A
UNIT A1A2A3b
max.
0.21
mm
2
Note
1. Plastic or metal protrusions of 0.2 mm maximum per side are not included.
OUTLINE
VERSION
SOT339-1 MO-150
0.05
1.80
0.25
1.65
IEC JEDEC JEITA
p
0.38
0.25
p
0 2.5 5 mm
scale
(1)E(1)
cD
0.20
7.4
0.09
5.4
7.0
5.2
REFERENCES
0.65
eHELLpQ
7.9
7.6
1.03
0.63
detail X
0.9
0.7
0.131.25 0.2 0.1
EUROPEAN
PROJECTION
(1)
Zywv θ
0.9
0.5
ISSUE DATE
99-12-27
03-02-19
o
8
o
0
Fig 10. Package outline SOT339-1 (SSOP20)
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
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
D
c
y
Z
20
pin 1 index
11
A
2
A
1
110
w M
b
e
p
E
H
E
L
detail X
SOT360-1
A
X
v M
A
Q
(A )
3
A
θ
L
p
0 2.5 5 mm
scale
DIMENSIONS (mm are the original dimensions)
A
UNIT A1A2A3b
max.
0.15
mm
1.1
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.
OUTLINE
VERSION
SOT360-1 MO-153
0.05
0.95
0.25
0.80
IEC JEDEC JEITA
p
0.30
0.19
(1)E(2) (1)
cD
0.2
6.6
0.1
6.4
REFERENCES
eHELLpQZywv θ
4.5
4.3
0.65
6.6
6.2
0.75
0.50
0.4
0.3
EUROPEAN
PROJECTION
o
0.5
0.13 0.10.21
ISSUE DATE
99-12-27
03-02-19
0.2
8
o
0
Fig 11. Package outline SOT360-1 (TSSOP20)
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
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
D
B
A
A
E
1
SOT764-1
c
terminal 1
index area
terminal 1
index area
L
1
E
h
20
DIMENSIONS (mm are the original dimensions)
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
(1)
A
UNIT
max.
mm
OUTLINE
VERSION
SOT764-1 MO-241 - - -- - -
0.05
0.00
e
29
19
A
1
c
b
0.30
0.2
0.18
IEC JEDEC JEITA
e
1
b
12
D
h
0 2.5 5 mm
scale
D
3.15
2.85
h
(1)
E
E
h
2.6
1.15
2.4
0.85
REFERENCES
0.51
D
(1)
4.6
4.4
e
3.5
detail X
C
y
X
ISSUE DATE
02-10-17
03-01-27
w
y
C
1
ye
y
0.05 0.1
EUROPEAN
PROJECTION
1
v
M
ACCB
w
M
10
e
11
L
1
0.5
0.1v0.05
0.3
Fig 12. Package outline SOT764-1 (DHVQFN20)
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
14. Revision history
Table 13: Revision history
Document ID Release
date
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 - - -
Data sheet status Change
notice
Doc. number Supersedes
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
15. Data sheet status
74HC245; 74HCT245
Octal bus tranceiver; 3-state
Level Data sheet status
I Objective data Development This data sheet contains data from the objective specification for product development. Philips
II Preliminary data Qualification This data sheet contains data from the preliminary specification. Supplementary data will be published
III Product data Production This data sheet contains data from the product specification. Philips Semiconductors reserves the
[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.
[1]
Product 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.
[2] [3]
Definition
Semiconductors reserves the right to change the specification in any manner without notice.
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.
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).
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 orwarranties that these productsare
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
9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 21 of 22
Philips Semiconductors
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
74HC245; 74HCT245
Octal bus tranceiver; 3-state
© 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.
Published in The Netherlands
Date of release: 31 January 2005
Document number: 9397 750 14502
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