MC74AC157 Просмотр технического описания (PDF) - Motorola => Freescale

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MC74AC157

QUAD 2-INPUT MULTIPLEXER

Motorola => Freescale 

MC74AC157

MC74ACT157

Quad 2ĆInput Multiplexer

The MC74AC157/74ACT157 is a high-speed quad 2-input multiplexer. Four

bits of data from two sources can be selected using the common Select and Enable

inputs. The four outputs present the selected data in the true (noninverted) form.

The MC74AC157/74ACT157 can also be used as a function generator.

• Outputs Source/Sink 24 mA

• ′ACT157 Has TTL Compatible Inputs

QUAD 2-INPUT

MULTIPLEXER

VCC E I0c I1c Zc I0d I1d Zd

16 15 14 13 12 11 10 9

12345678

S I0a I1a Za I0b I1b Zb GND

PIN NAMES

I0a–I0d

I1a–I1d

E

S

Za–Zd

Source 0 Data Inputs

Source 1 Data Inputs

Enable Input

Select Input

Outputs

N SUFFIX

CASE 648-08

PLASTIC

D SUFFIX

CASE 751B-05

PLASTIC

TRUTH TABLE

Inputs

E S I0 I1

HXXX

L HX L

LHXH

LLLX

L LHX

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Outputs

Z

L

L

H

L

H

LOGIC SYMBOL

E I0a I1a I0b I1b I0c I1c I0d I1d

S

Za

Zb Zc Zd

FACT DATA

5-1

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