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74AC257

Quad 2−Input Multiplexer with 3−State Outputs

ON Semiconductor 

MC74AC257, MC74ACT257

AC CHARACTERISTICS (For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)

74ACT

74ACT

Symbol

Parameter

VCC*

(V)

TA = +25°C

CL = 50 pF

TA = −40°C

to +85°C

CL = 50 pF

Unit

Fig.

No.

Min Typ Max Min Max

tPLH

Propagation Delay

In to Zn

tPHL

Propagation Delay

In to Zn

tPLH

Propagation Delay

S to Zn

tPHL

Propagation Delay

S to Zn

tPZH

Output Enable Time

tPZL

Output Enable Time

tPHZ

Output Disable Time

tPLZ

Output Disable Time

*Voltage Range 5.0 V is 5.0 V ±0.5 V.

5.0 1.5 5.0 7.0 1.0 7.5

ns

3−6

5.0 2.0 6.0 7.5 1.5 8.5

ns

3−6

5.0 2.0 7.0 9.5 1.5 10.5 ns

3−6

5.0 2.5 7.0 10.5 2.0 11.5

ns

3−6

5.0 2.0 6.0 8.0 1.5 9.0

ns

3−7

5.0 2.0 6.0 8.0 1.5 9.0

ns

3−8

5.0 2.5 6.5 9.0 1.5 10.0 ns

3−7

5.0 2.0 6.0 7.5 1.5 8.5

ns

3−8

CAPACITANCE

Symbol

Parameter

CIN

Input Capacitance

CPD

Power Dissipation Capacitance

Value

Typ

Unit

4.5

pF

50

pF

Test Conditions

VCC = 5.0 V

VCC = 5.0 V

DIP−16

MC74AC257N

AWLYYWW

MC74ACT257N

AWLYYWW

MARKING DIAGRAMS

SO−16

TSSOP−16

AC257

AWLYWW

AC

257

ALYW

ACT257

AWLYWW

ACT

257

ALYW

A

= Assembly Location

WL, L = Wafer Lot

YY, Y = Year

WW, W = Work Week

EIAJ−16

74AC257

ALYW

74ACT257

ALYW

http://onsemi.com

8

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