74LVC161 Просмотр технического описания (PDF) - Philips Electronics

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74LVC161

Presettable synchronous 4-bit binary counter; asynchronous reset

Philips Electronics 

Philips Semiconductors

Presettable synchronous 4-bit binary counter;

asynchronous reset

Product specification

74LVC161

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

MIN TYP1 MAX

VCC = 2.7V

MIN MAX

tPHL

Propagation delay

tPLH

CP to Qn

tPHL

Propagation delay

tPLH

CP to TC

tPHL

Propagation delay

tPLH

CET to TC

tPHL

Propagation delay

MR to Qn

1

–

4.9

8.0

–

9.0

1

–

5.7

9.5

–

11

2

–

4.5

7.8

–

8.8

3

–

5.2

9.0

–

10

tPHL

Propagation delay

MR to TC

3

–

5.7

10

–

11

tW

Clock pulse width

HIGH or LOW

1

4.0

1.2

–

5.0

–

tW

Master reset

width LOW

3

3.0

1.6

–

4.0

–

trem

Removal time

MR to CP

3

0

–0.3

–

0

–

tsu

Set-up time

Dn to CP

tsu

Set-up time

PE to CP

4

2.5

1.0

–

3.0

–

4

3.0

1.2

–

3.5

–

tsu

Set-up time

CEP, CET to CP

5

5.0

2.1

–

5.5

–

th

Hold time

Dn, PE, CEP, CET to CP

fmax

Maximum clock

pulse frequency

4, 5

0

–1.7

–

0

–

1

125

200

–

110

–

NOTE:

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

VCC = 1.2V

TYP

24

28

22

28

20

–

–

–

–

–

–

–

–

UNIT

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

MHz

1998 May 20

8

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