HD74HC74 Datasheet, PDF (4/8 Pages) Hitachi Semiconductor – Dual D-type Flip-Flops (with Preset and Clear)

HD74HC74
Switching Characteristics (C_L = 50 pF, Input t_r = t_f = 6 ns)
Item
Hold time
Removal time
Pulse width
Output rise/fall
time
Input capacitance
Symbol VCC (V)
th
2.0
4.5
6.0
trem
2.0
4.5
6.0
tw
2.0
4.5
6.0
tTLH, tTHL 2.0
4.5
6.0
Cin
—
Ta = 25°C
Ta = –40 to +85°C
Min Typ Max Min Max Unit
Test Conditions
5 ——
5
— ns Clock to Data
5
0—
5
—
5 –5 —
5
—
25 — —
31
— ns Preset, Clear to Clock
5 ——
6
—
4 ——
5
—
80 — — 100
— ns Clock, Preset, Clear
16 8 —
20
—
14 — —
17
—
— — 75
—
95 ns
— 5 15
—
19
— — 13
—
16
— 5 10
—
10 pF
Test Circuit
VCC
VCC
Input
Pulse generator
Zout = 50 Ω
Input
Pulse generator
Zout = 50 Ω
Output
Clock _Q
PR
D
Output
C_L = 50 pF
Clear Q
C_L = 50 pF
Note: C_L includes the probe and jig capacitance.
Rev.2.00, Oct 06, 2005 page 4 of 7