Datasheet > CD54HCT257

CD54HCT257

更新时间： 2024-11-01 21:58:27

品牌	Logo	应用领域
德州仪器 - TI		复用器
页数	文件大小	规格书
12页	275K
描述
High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

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数据手册
替代型号

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CD54HCT257 数据手册

CD54HC257, CD74HC257,

CD54HCT257, CD74HCT257

Data sheet acquired from Harris Semiconductor

SCHS171D

High-Speed CMOS Logic Quad 2-Input

Multiplexer with Three-State Non-Inverting Outputs

November 1997 - Revised October 2003

all other input conditions.

Features

Moving data from two groups of registers to four common

output buses is a common use of the 257. The state of the

Select input determines the particular register from which

the data comes. It can also be used as a function generator.

• Buffered Inputs

• Typical Propagation Delay ( In to Output ) = 12ns at

[ /Title

(CD74

HC257

CD74

HCT25

= 5V, C = 15pF, T = 25 C

L A

• Fanout (Over Temperature Range)

Ordering Information

- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

TEMP. RANGE

PART NUMBER

CD54HC257F3A

CD54HCT257F3A

CD74HC257E

( C)

PACKAGE

16 Ld CERDIP

16 Ld PDIP

16 Ld SOIC

16 Ld PDIP

16 Ld SOIC

• Wide Operating Temperature Range . . . -55 C to 125 C

• Balanced Propagation Delay and Transition Times

-55 to 125

/Sub-

ject

• Signiﬁcant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

(High

Speed

CMOS

Logic

Quad

2-Input

Multi-

plexer

CD74HC257M

- High Noise Immunity: N = 30%, N = 30% of V

IL IH CC

CD74HC257MT

CD74HC257M96

CD74HCT257E

CD74HCT257M

CD74HCT257MT

CD74HCT257M96

at V

= 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

V = 0.8V (Max), V = 2V (Min)

IL IH

- CMOS Input Compatibility, I ≤ 1µA at V , V

OL OH

Description

The ’HC257 and ’HCT257 are quad 2-input multiplexers

which select four bits of data from two sources under the

control of a common Select Input (S). The Output Enable

input (OE) is active LOW. When OE is HIGH, all of the out-

puts (1Y-4Y) are in the high impedance state regardless of

NOTE: When ordering, use the entire part number. The sufﬁx 96

denotes tape and reel. The sufﬁx T denotes a small-quantity reel of

250.

Pinout

CD54HC257, CD54HCT257

(CERDIP)

CD74HC257, CD74HCT257

(PDIP, SOIC)

TOP VIEW

16 V

15 OE

14 4I

13 4I

12 4Y

11 3I

10 3I

GND

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

12 3 4 5 6 7...12

中文翻译

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CD54HCT257 替代型号

型号	品牌	替代类型	描述	数据表
CD74HCT257	TI	功能相似	High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

与CD54HCT257相关器件

型号	品牌	获取价格	描述	数据表
CD54HCT257E	ETC	获取价格	Logic IC
CD54HCT257EN	ETC	获取价格	Logic IC
CD54HCT257F	ETC	获取价格	Logic IC
CD54HCT257F/3	RENESAS	获取价格	Multiplexer, HCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, CDIP16,
CD54HCT257F/3A	RENESAS	获取价格	IC HCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CDIP16, Multiplexer/Demulti
CD54HCT257F3A	RENESAS	获取价格	IC,LOGIC MUX,QUAD,2-INPUT,HCT-CMOS,DIP,16PIN,CERAMIC
CD54HCT257F3A	TI	获取价格	High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs
CD54HCT257H/3	RENESAS	获取价格	HCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, UUC16
CD54HCT257H/3A	RENESAS	获取价格	HCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, UUC16
CD54HCT257M	ETC	获取价格	Logic IC

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