MC74ACT259

更新时间： 2024-11-10 23:01:31

品牌	Logo	应用领域
安森美 - ONSEMI		锁存器双倍数据速率
页数	文件大小	规格书
9页	239K
描述
8-BIT ADDRESSABLE LATCH

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数据手册

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MC74ACT259 数据手册

8-BIT

ADDRESSABLE

LATCH

The MC74AC259/74ACT259 is a high-speed 8-bit addressable latch designed for

general purpose storage applications in digital systems. It is a multifunctional device

capable of storing single line data in eight addressable latches, and also a 1-of-8

decoder and demultiplexer with active HIGH outputs. The device also incorporates

an active LOW Common Clear for resetting all latches, as well as an active LOW

Enable. It is functionally identical to the ALS259 8-bit addressable latch.

• Serial-to-Parallel Conversion

• Eight Bits of Storage with Output of Each Bit Available

• Random (Addressable) Data Entry

• Active High Demultiplexing or Decoding Capability

• Easily Expandable

• Common Clear

N SUFFIX

CASE 648-08

PLASTIC

FUNCTIONAL DESCRIPTION

The MC74AC259/74ACT259 has four modes of operation as shown in the Mode

Selection Table. In the addressable latch mode, data on the Data line (D) is written

into the addressed latch. The addressed latch will follow the data input with all non-

addressed latches remaining in their previous states in the memory mode. All latches

remain in their previous state and are unaffected by the Data or Address inputs.

In the one-of-eight decoding or demultiplexing mode, the addressed output will

follow the state of the D input with all other outputs in the LOW state. In the clear

mode all outputs are LOW and unaffected by the address and data inputs. When

operating the MC74AC/ACT259 as an addressable latch, changing more than one

bit of the address could impose a transient wrong address. Therefore, this should

only be done while in the memory mode. The Mode Select Function Table

summarizes the operations of the MC74AC/ACT259.

D SUFFIX

CASE 751B-05

PLASTIC

LOGIC SYMBOL

MR Q

6 7

GND

FACT DATA

5-1

12 3 4 5 6 7...9

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与MC74ACT259相关器件

型号	品牌	获取价格	描述	数据表
MC74ACT259D	ONSEMI	获取价格	8−Bit Addressable Latch
MC74ACT259D	MOTOROLA	获取价格	8-BIT ADDRESSABLE LATCH
MC74ACT259DG	ONSEMI	获取价格	8−Bit Addressable Latch
MC74ACT259DR	MOTOROLA	获取价格	ACT SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDSO16, PLASTIC, SOIC-16
MC74ACT259DR2	ONSEMI	获取价格	8−Bit Addressable Latch
MC74ACT259DR2	ROCHESTER	获取价格	ACT SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDSO16, SOIC-16
MC74ACT259DR2G	ONSEMI	获取价格	8−Bit Addressable Latch
MC74ACT259N	ONSEMI	获取价格	8−Bit Addressable Latch
MC74ACT259N	MOTOROLA	获取价格	8-BIT ADDRESSABLE LATCH
MC74ACT259N	ROCHESTER	获取价格	ACT SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDIP16, PLASTIC, DIP-16