HD74LS242P Просмотр технического описания (PDF) - Renesas Electronics

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HD74LS242P

Quadruple Bus Transceivers (with three-state outputs)

Renesas Electronics 

HD74LS242

Waveforms 2

GAB

tTHL

90 %

1.3 V

10 %

GBA

Waveform-a

Waveform-b

1.3 V

tZL

S1 close

S2 open

tZH

S1 open

S2 close

tTLH

3V

90 %

10 % 1.3 V

0V

3V

0V

~~ 4.5 V

1.3 V

VOL

1.3 V

VOH

~~ 0 V

1.3 V

tLZ

tHZ

3V

0V

3V

0V

S1, S2 close ~~ 1.5 V

0.5 V

VOL

VOH

0.5 V ~~ 1.5 V

S1, S2 close

Notes:

1. Input pulse: tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%

2. Waveform a is an output by internal conditions like "L" except for the case where an output is

disabled by output control.

3. Waveform b is an output by internal conditions like "H" except for the case where an output is

disabled by output control.

Rev.3.00, Jul.15.2005, page 5 of 6

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