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74HC245N,652

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
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.
V
OL
and V
OH
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.
V
OL
and V
OH
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
V
M
74HC245 0.5V
CC
0.5V
CC
74HCT245 1.3 V 1.3 V
001aac433
t
PLH
t
PHL
V
M
V
M
90 %
10 %
V
M
V
M
Bn, An output
An, Bn input
V
I
GND
V
OH
V
OL
t
TLH
t
THL
001aac479
t
PLZ
t
PHZ
outputs
disabled
outputs
enabled
90 %
10 %
outputs
enabled
OE input
V
I
V
CC
V
OL
V
OH
GND
GND
V
M
t
PZL
t
PZH
V
M
V
M
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
t
r
t
f
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:
R
T
= Termination resistance should be equal to output impedance Z
o
of the pulse generator.
C
L
= Load capacitance including jig and probe capacitance.
R
L
= Load resistor.
Fig 7. Load circuitry for switching times
Table 12: Test data
Type Input Test
V
I
t
r
, t
f
t
PHL
, t
PLH
t
PZH
, t
PHZ
t
PZL
, t
PLZ
74HC245 V
CC
6 ns open GND V
CC
74HCT245 3 V 6 ns open GND V
CC
mgk563
D.U.T
V
CC
V
CC
V
I
V
O
R
T
R
L
= 1 kΩ
C
L
50 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
b
1
cD 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.
b
Z
max.
w
M
E
e
1
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
M
H
c
(e )
1
M
E
A
L
seating plane
A
1
w M
b
1
e
D
A
2
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
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

74HC245N,652

Mfr. #:
Buy 74HC245N,652
Manufacturer:
NXP Semiconductors
Description:
Bus Transceivers OCTAL BUS TXRX 3ST
Lifecycle:
New from this manufacturer.
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