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零件编号
产品描述 (功能)
MC74F657A 查看數據表(PDF) - Motorola => Freescale
零件编号
产品描述 (功能)
生产厂家
MC74F657A
OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS)
Motorola => Freescale
MC74F657A Datasheet PDF : 5 Pages
1
2
3
4
5
F657A
AC ELECTRICAL CHARACTERISTICS
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
An to Bn or Bn to An
Propagation Delay
An to PARITY
Propagation Delay
EVEN/ODD to PARITY, ERROR
Propagation Delay
Bn to ERROR
Propagation Delay
PARITY to ERROR
Output Enable Time
to HIGH or LOW Level
Output Disable Time
from HIGH or LOW Level
F657B
AC ELECTRICAL CHARACTERISTICS
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
An to Bn or Bn to An
Propagation Delay
An to PARITY
Propagation Delay
EVEN/ODD to PARITY, ERROR
Propagation Delay
Bn to ERROR
Propagation Delay
PARITY to ERROR
Output Enable Time
to HIGH or LOW Level
Output Disable Time
from HIGH or LOW Level
MC74F657A, B
74F
74F
TA = +25
°
C
VCC = +5.0 V
CL = 50 pF
TA = 0
°
C to +70
°
C
VCC = +5.0 V
±
10%
CL = 50 pF
Min
Typ
Max
Min
Max
Unit
2.0
7.0
2.0
7.5
ns
2.0
7.0
2.0
7.5
6.0
13
5.5
14
ns
6.5
13
6.5
14
4.5
10.5
4.5
11
ns
4.5
10.5
4.5
11.5
7.0
18
6.5
19
ns
7.0
18
6.5
19
8.0
14
7.0
15
ns
7.0
14
7.0
15
3.0
8.0
3.0
9.0
ns
4.0
9.0
4.0
10
2.0
7.5
2.0
8.0
ns
2.0
6.0
2.0
6.5
74F
74F
TA = +25
°
C
VCC = +5.0 V
CL = 50 pF
TA = 0
°
C to +70
°
C
VCC = +5.0 V
±
10%
CL = 50 pF
Min
Typ
Max
Min
Max
Unit
2.0
6.0
2.0
6.5
ns
2.0
6.0
2.0
6.5
4.5
11.5
4.5
13
ns
4.5
11.5
4.5
13
2.0
7.5
2.0
8.5
ns
2.0
7.5
2.0
8.5
4.0
15
3.5
16
ns
4.0
15
3.5
16
5.0
11
4.0
12
ns
5.0
11
4.0
12
2.0
7.0
2.0
8.0
ns
2.0
7.0
2.0
8.0
2.0
6.0
2.0
6.5
ns
2.0
6.0
2.0
6.5
FAST AND LS TTL DATA
4-250
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