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參數資料
| 型號： | MC74F779N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-BIT BIDIRECTIONAL BINARY COUNTER (3-STATE) |
| 中文描述： | F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16 |
| 封裝： | 648-08 |
| 文件頁數： | 3/4頁 |
| 文件大小： | 105K |
| 代理商： | MC74F779N |
4-254
FAST AND LS TTL DATA
MC74F779
AC ELECTRICAL CHARACTERISTICS
Symbol
Parameter
74F
74F
Unit
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
fMAX
tPLH
tPHL
Maximum Clock Frequency
125
80
MHz
Propagation Delay
CP to I/On
4.5
5.5
10.5
10.5
4.5
5.5
11
11
ns
tPLH
tPHL
Propagation Delay
CP to TC
4.5
4.5
9.0
9.0
4.5
4.5
10
10
ns
tPLH
tPHL
Propagation Delay
CET to TC
3.0
3.0
6.5
7.5
2.5
2.5
7.5
8.0
ns
tPZH
tPZL
Enable Time from
High or Low Level
2.5
4.5
7.0
9.0
2.5
4.5
8.0
9.5
ns
tPHZ
tPLZ
Disable Time from
High or Low Level
1.0
1.0
6.5
7.0
1.0
1.0
8.0
8.0
ns
AC SETUP REQUIREMENTS
Symbol
Parameter
74F
74F
Unit
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
Typ
Max
ts(H)
ts(L)
Set-up time, HIGH or LOW
I/On to CP
5.0
5.0
5.0
5.0
ns
th(H)
th(L)
Hold time, HIGH or LOW
I/On to CP
1.0
1.0
2.0
2.0
ns
ts(H)
ts(L)
Set-up time, HIGH or LOW
CET to CP
5.0
5.5
5.0
6.0
ns
th(H)
th(L)
Hold time, HIGH or LOW
CET to CP
0
0
0
0
ns
ts(H)
ts(L)
Set-up time, HIGH or LOW
Sn to CP
8.0
8.0
8.5
8.5
ns
th(H)
th(L)
Hold time, HIGH or LOW
Sn to CP
0
0
0
0
ns
tw(H)
tw(L)
Clock Pulse Width
4.0
4.0
4.0
4.0
ns
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