HD74LS161AP datasheet(8/11 Pages) RENESAS

Part #	HD74LS161AP

Description	Synchronous 4-bit Binary Counter (direct clear)

PDF	11 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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8 / 11 page

HD74LS161A

Rev.2.00, Feb.18.2005, page 8 of 10

Waveforms 2

tPLH, tPHL, (Clock→Q)

Clock

Data Inputs

A, B, C or D

Outputs

QA, QB, QC or QD

1.3V

tTHL

tTLH

tTHL

tTLH

tPLH

tPHL

VOH

VOL

10%

90%

10%

90%

Note:

Input pulse: tTLH

≤ 15 ns, t

THL

≤ 6 ns, Clock input: PRR = 1 MHz, duty cycle 50%,

Data input: PRR = 500 kHz, duty cycle 50%

Waveforms 3

tPLH, tPHL, (Enable T→Ripple Carry)

tPLH

tPHL

VOH

0 V

3 V

1.3 V

Enable T

Carry

Output

10 %

90 %

tTLH

tTHL

10 %

90 %

Note:

Input pulse: tTLH

≤ 15 ns, t

THL

≤ 6 ns, PRR = 1 MHz

Waveforms 4

tPHL, (Clear→Q)

Clear

QA to QD

1.3V

tTHL

tTLH

tPHL

tw (CLR)

≥ 20ns

VOH

VOL

10%

90%

Note:

Input pulse: tTLH

≤ 15 ns, t

THL

≤ 6 ns

HD74LS161AP Datasheet(PDF) 8 Page - Renesas Technology Corp

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