MC74AC138D 데이터 시트보기 (PDF) - Motorola => Freescale

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MC74AC138D

1-of-8 Decoder/Demultiplexer

Motorola => Freescale 

MC74AC138

MC74ACT138

1ĆofĆ8 Decoder/Demultiplexer

The MC74AC138/74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This

device is ideally suited for high-speed bipolar memory chip select address decoding.

The multiple input enables allow parallel expansion to a 1-of-24 decoder using just

three MC74AC138/74ACT138 devices or a 1-of-32 decoder using four MC74AC138/

74ACT138 devices and one inverter.

• Demultiplexing Capability

• Multiple Input Enable for Easy Expansion

• Active LOW Mutually Exclusive Outputs

• Outputs Source/Sink 24 mA

• ′ACT138 Has TTL Compatible Inputs

VCC O0 O1 O2 O3 O4 O5 O6

16 15 14 13 12 11 10 9

1-OF-8 DECODER/

DEMULTIPLEXER

N SUFFIX

CASE 648-08

PLASTIC

12345678

A0 A1 A2 E1 E2 E3 O7 GND

PIN NAMES

A0–A2

E1–E2

E3

O0–O7

Address Inputs

Enable Inputs

Enable Input

Outputs

D SUFFIX

CASE 751B-05

PLASTIC

LOGIC SYMBOL

A0 A1 A2

E1 E2 E3

O0 O1 O2 O3 O4 O5 O6 O7

FACT DATA

5-1

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