HD74LS373FPEL 查看數據表（PDF） - Renesas Electronics

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HD74LS373FPEL

Octal D-type Transparent Latches (with three-state outputs)

Renesas Electronics 

HD74LS373

Waveforms 2

tTLH

tTHL

Data

90%

1.3V

10%

tsu

90%

1.3V

10%

th

tsu

Enable

G

Q

1.3V

tPLH

tPLH

1.3V

S1, S2 Closed 1.3V

1.3V

tPHL

tPHL

th

1.3V

1.3V

1.3V

Note: Enable input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz

Data input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, G input is high

3V

0V

3V

0V

VOH

VOL

Waveforms 3

Notes:

tTHL

tTLH

Output

Control

90%

1.3V

10%

tZL

90%

3V

1.3V

10%

0V

Waveform A

S1 closed,

S2 open 1.3V

tZH

4.5V

tLZ

S1, S2 closed

1.5V

VOL

tHZ

0.5V

VOH

Waveform B

S1 open,

S2 closed

1.3V

0V

0.5V

S1, S2 closed

1.5V

1. Input pulse; tTLH ≤ 15 ns, tTHL ≤ 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

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