HD74LS374_15 Datasheet, PDF (7/10 Pages) Renesas Technology Corp – Octal D-type Edge-triggered Flip-Flops (with three-state outputs)

HD74LS374
Waveforms 1
t_TLH
t_THL
Data
10%
90%
1.3 V
90%
1.3 V
10%
3V
1.3 V
0V
t_su
t_h
t_su
t_h
t_TLH
t_THL
Clock
90% 90%
1.3 V 1.3 V
1.3 V
3V
10% 10%
0V
t_w
t_w
t_PLH
t_PHL
Q
V_OH
S1, S2 Closed 1.3 V
1.3 V
V_OL
Notes:
1. Input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns
Clock input; PRR = 1 MHz, duty cycle 50%
Data input pulse; PRR = 500 kHz, duty cycle 50%
2. ƒ_max: t_TLH ≤ 2.5 ns, t_THL ≤ 2.5 ns
Waveforms 2
Notes:
t_THL
t_TLH
Output
Control
90%
1.3V
10%
t_ZL
Waveform A
S1 closed,
S2 open _1.3V
t_ZH
90%
1.3V
10%
4.5V
t_LZ
t_HZ
3V
0V
S1, S2 closed
0.5V
1.5V
V_OL
V_OH
Waveform B
S1 open,
S2 closed
1.3V
0V
0.5V
S1, S2 closed
1.5V
1. Input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%
2. Waveform A if for an output with internal conditions such that the output is low except when
disabled by the output control. Waveform B is for an output with internal conditions such that
the output is high except when disabled by the output control.
Rev.2.00, Feb.18.2005, page 5 of 7