Input tr, tf = 3ns, CL = 50pF (Worst Case)

PARAMETER

SYMBOL

VCC (V)

-40°C TO 85°C

-55°C TO 125°C

UNITS

MIN

TYP

MAX

MIN

TYP

MAX

Propagation Delay, In to Y AC/

ACT257

tPLH, tPHL

5 (2)

2.8

-

9.7

2.7

-

10.7

ns

Propagation Delay, S to Y AC/

ACT257

tPLH, tPHL

5

4

-

14

3.9

-

15.4

ns

Propagation Delay, OE to Y AC/

ACT257

tPLZ, tPHZ, tPZL,

tPZH

5

4.1

-

14.6

4

-

16.1

ns

Propagation Delay, In to Y ’AC/

CD74ACT258

tPLH, tPHL

5

2.4

-

8.5

2.3

-

9.3

ns

Propagation Delay, S to Y ’AC/

CD74ACT258

tPLH, tPHL

5

4

-

14

3.9

-

15.4

ns

Propagation Delay, OE to Y ’AC/

CD74ACT258

tPLZ, tPHZ, tPZL,

tPZH

5

4.1

-

14.6

4

-

16.1

ns

Three-State Output Capacitance CO

-

-

-

15

-

-

15

pF

Input Capacitance

CI

-

-

-

10

-

-

10

pF

Power Dissipation Capacitance

CPD (3)

-

-

130

-

-

130

-

pF

(1)

3.3V Min is at 3.6V, Max is at 3V.

(2)

5V Min is at 5.5V, Max is at 4.5V.

(3)

CPD is used to determine the dynamic power consumption per multiplexer.

Note

AC: PD = CPD VCC 2 fi + ∑ (CL VCC 2 fo)

ACT: PD = CPD VCC 2 fi + ∑ (CL VCC 2 fo) + VCC ΔICC where fi = input frequency, fo = output frequency,

CL = output load capacitance, VCC = supply voltage.

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CD54AC257, CD74AC257, CD54ACT257, CD74ACT257, CD74ACT258

SCHS248C – NOVEMBER 1998 – REVISED APRIL 2025

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