74LVC161 datasheet(8/14 Pages) PHILIPS

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Philips Semiconductors

Product specification

74LVC161

Presettable synchronous 4-bit binary counter;

asynchronous reset

1998 May 20

AC CHARACTERISTICS

GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF; RL = 500W; Tamb = –40_C to +85_C

LIMITS

SYMBOL

PARAMETER

WAVEFORM

VCC = 3.3V ±0.3V

VCC = 2.7V

VCC = 1.2V

UNIT

MIN

TYP1

MAX

MIN

MAX

TYP

tPHL

tPLH

Propagation delay

CP to Qn

–

4.9

8.0

–

9.0

tPHL

tPLH

Propagation delay

CP to TC

–

5.7

9.5

–

tPHL

tPLH

Propagation delay

CET to TC

–

4.5

7.8

–

8.8

tPHL

Propagation delay

MR to Qn

–

5.2

9.0

–

tPHL

Propagation delay

MR to TC

–

5.7

–

Clock pulse width

HIGH or LOW

4.0

1.2

–

5.0

–

Master reset

width LOW

3.0

1.6

–

4.0

–

trem

Removal time

MR to CP

–0.3

–

tsu

Set-up time

Dn to CP

2.5

1.0

–

3.0

–

tsu

Set-up time

PE to CP

3.0

1.2

–

3.5

–

tsu

Set-up time

CEP, CET to CP

5.0

2.1

–

5.5

–

Hold time

Dn, PE, CEP, CET to CP

4, 5

–1.7

–

fmax

Maximum clock

pulse frequency

125

200

–

110

–

MHz

NOTE:

1. These typical values are at VCC = 3.3V and Tamb = 25°C.

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