MC74F521 查看數據表（PDF） - Motorola => Freescale
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MC74F521 Datasheet PDF : 3 Pages
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FUNCTION TABLE
Inputs
IA = B
L
A, B
A = B*
L
A≠B
H
A = B*
H
A≠B
H = HIGH Voltage Level
L = LOW Voltage Level
*A0 = B0, A1 = B1, A2 = B2, etc.
AC CHARACTERISTICS
Symbol
tPLH
tPHL
tPLH
tPHL
Parameter
Propagation Delay
An or Bn to OA = B
Propagation Delay
IA = B to OA = B
MC54/74F521
Output
OA = B
L
H
H
H
54/74F
54F
74F
TA = +25°C
TA = –55°C to +125°C
TA = 0°C to +70°C
VCC = +5.0 V
VCC = 5.0 V ± 10%
VCC = 5.0 V ± 10%
CL = 50 pF
CL= 50 pF
CL= 50 pF
Min Typ Max
Min
Max
Min
Max
Unit
2.5
6.5
10
2.5
15
2.5
11
ns
3.0
6.5
10
3.0
12
3.0
11
2.5
4.5
6.5
2.5
8.5
2.5
7.5
ns
3.5
5.0
9.0
3.5
10
3.5
10
ENABLE
LOW
A0 B0 A7 B7
......
IA = B
OA = B
Ripple Expansion
A8 B8 A15 B15
.......
IA = B
OA = B
A16 B16 A23 B23
.......
IA = B
OA = B
A0 B0 A7 B7
......
IA = B
OA = B
Parallel Expansion
A8 B8 A15 B15
.......
IA = B
OA = B
A16 B16 A23 B23
.......
IA = B
OA = B
Figure 1. Applications
FAST AND LS TTL DATA
4-197
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