HD74LS258 Datasheet, PDF(5/7 Page) Hitachi Semiconductor – Quadruple 2-line-to-1-line Data Selectors/Multiplexers(with three-state outputs)

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HD74LS258 Datasheet, PDF (5/7 Pages) Hitachi Semiconductor – Quadruple 2-line-to-1-line Data Selectors/Multiplexers(with three-state outputs)

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HD74LS258

Waveforms 2

Output

Control

Input

tTHL

90%

1.3V

10%

tZL

Waveform A

S1 closed,

S2 open 1.3V

tZH

Waveform B

S1 open, 1.3V

S2 closed

tTLH

90%

1.3V

10%

4.5V

tLZ

S1 and,

S2 closed

1.5V

VOL

tHZ

0.5V

VOH

0.5V

S1 and, S2 closed

1.5V

Notes:

1. Input pulse; tTLH â¤ 15 ns, tTHL â¤ 6 ns, PRR = 1 MHz, duty cycle = 50%

2. Waveform A is for an output with internal conditions such that the output is low except when

disabled by the output control.

3. Waveform B is for an output with internal conditions such that the output is high except when

disabled by the output control.

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

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