HD74LS373_15 Datasheet, PDF (7/10 Pages) Renesas Technology Corp – Octal D-type Transparent Latches (with three-state outputs)

HD74LS373
Waveforms 2
t_TLH
t_THL
Data
90%
1.3V
10%
t_su
90%
1.3V
10%
t_h
t_su
Enable
G
Q
1.3V
t_PLH
t_PLH
1.3V
S1, S2 Closed 1.3V
1.3V
t_PHL
t_PHL
t_h
1.3V
1.3V
1.3V
Note: Enable input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz
Data input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz, G input is high
3V
0V
3V
0V
V_OH
V_OL
Waveforms 3
Notes:
t_THL
t_TLH
Output
Control
90%
1.3V
10%
t_ZL
90%
3V
1.3V
10%
0V
Waveform A
S1 closed,
S2 open _1.3V
t_ZH
4.5V
t_LZ
S1, S2 closed
1.5V
V_OL
t_HZ
0.5V
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