MC74AC256D

更新时间： 2024-11-21 22:46:23

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MC74AC256D 数据手册

DUAL 4-BIT

ADDRESSABLE

LATCH

The MC74AC256/74ACT256 dual addressable latch has four distinct modes

of operation which are selectable by controlling the Clear and Enable inputs

(see Function Table). In the addressable latch mode, data at the Data (D) inputs

is written into the addressed latches. The addressed latches will follow the Data

input with all unaddressed latches remaining in their previous states.

In the memory mode, all latches remain in their previous states and are

unaffected by the Data or Address inputs. To eliminate the possibility of entering

erroneous data in the latches, the enable should be held HIGH (inactive) while

the address lines are changing. In the dual 1-of-4 decoding or demultiplexing

mode (MR = E = LOW), addressed outputs will follow the level of the D inputs

with all other outputs LOW. In the clear mode, all outputs are LOW and unaffected

by the Address and Data inputs.

N SUFFIX

CASE 648-08

PLASTIC

• Combines Dual Demultiplexer and 8-Bit Latch

• Serial-to-Parallel Capability

• Output from Each Storage Bit Available

• Random (Addressable) Data Entry

• Easily Expandable

• Common Clear Input

• Useful as Dual 1-of-4 Active HIGH Decoder

D SUFFIX

CASE 751B-05

PLASTIC

GND

LOGIC SYMBOL

0a 1a 2a 3a 0b 1b 2b 3b

FACT DATA

5-1

12 3 4 5 6 7

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型号	品牌	获取价格	描述	数据表
MC74AC256DR2	MOTOROLA	获取价格	AC SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDSO16, PLASTIC, SOIC-16
MC74AC256N	MOTOROLA	获取价格	DUAL 4-BIT ADDRESSABLE LATCH
MC74AC257	ONSEMI	获取价格	QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
MC74AC257_15	ONSEMI	获取价格	Quad 2-Input Multiplexer with 3-State Outputs
MC74AC257D	MOTOROLA	获取价格	QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
MC74AC257D	ONSEMI	获取价格	Quad 2−Input Multiplexer with 3−State Outputs
MC74AC257DC	MOTOROLA	获取价格	Multiplexer, AC Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, PL
MC74AC257DCR1	MOTOROLA	获取价格	AC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, PLASTIC, SOIC-16
MC74AC257DG	ONSEMI	获取价格	Quad 2-Input Multiplexer with 3-State Outputs
MC74AC257DR	MOTOROLA	获取价格	Multiplexer, AC Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, PL