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HD74HC74 Datasheet, PDF (4/9 Pages) Hitachi Semiconductor – Dual D-type Flip-Flops (with Preset and Clear) | |||
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HD74HC74
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = â40 to
+85°C
Item
Maximum clock
frequency
Symbol
f max
VCC (V)
2.0
4.5
Min Typ Max Min
ââ5 â
â 35 25 â
Max Unit Test Conditions
4
MHz
20
6.0
â â 29 â 24
Propagation delay tPLH
time
t PHL
2.0
â â 160 â 200 ns Clock to Q or Q
4.5
â 14 32 â 40
6.0
â â 27 â 34
2.0
â â 160 â 200
Preset or Clear to Q or Q
4.5
â 13 32 â 40
6.0
â â 27 â 34
Setup time
t su
2.0
100 â â 125 â ns Data to Clock
4.5
20 1 â 25 â
6.0
17 â â 21 â
Hold time
th
2.0
5 ââ 5
â ns Clock to Data
4.5
5 0 â5
â
6.0
5 ââ 5
â
Removal time
t rem
2.0
25 â â 31 â ns Preset, Clear to Clock
4.5
5 â5 â 6
â
6.0
4 ââ 5
â
Pulse width
tw
2.0
80 â â 100 â ns Clock, Preset, Clear
4.5
16 8 â 20 â
6.0
14 â â 17 â
Output rise/fall
t TLH
time
t THL
2.0
â â 75 â 95 ns
4.5
â 5 15 â 19
6.0
â â 13 â 16
Input Capacitance Cin
â
â 5 10 â 10 pF
4
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