Datasheet > 74LCX257T

74LCX257T

更新时间： 2024-11-22 23:24:19

品牌	Logo	应用领域
其他 - ETC		复用器
页数	文件大小	规格书
10页	73K
描述
2-Input Digital Multiplexer

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中文翻译

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数据手册

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74LCX257T 数据手册

74LCX257

LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER

WITH 5V TOLERANT INPUTS AND OUTPUTS (3-STATE)

■

5VTOLERANT INPUTS AND OUTPUTS

HIGH SPEED:

t_PD=6.0 ns (MAX.)at V_CC=3V

POWER-DOWN PROTECTIONON INPUTS

ANDOUTPUTS

SYMMETRICALOUTPUT IMPEDANCE:

|I_OH| = I_OL=24 mA (MIN)

■

(Micro Package)

(TSSOPPackage)

ORDER CODES :

■

PCI BUSLEVELSGUARANTEED AT 24mA

BALANCEDPROPAGATIONDELAYS:

t_PLHt_PHL

74LCX257M

74LCX257T

■

OPERATINGVOLTAGERANGE:

It is composed of four independent 2 channel

multiplexers with common SELECT and ENABLE

INPUT. The 74VHC257 is a non inverting

multiplexer.

When the ENABLE INPUT is held ”High”, all

outputs become high impedance state. If

SELECT INPUT is held ”Low”, ”A” data is

selected, when SELECT INPUT is ”High”, ”B”

data is chosen. It has same speed performance

at 3.3V than 5V, AC/ACT family, combined with a

lower power consumption.

V_CC(OPR)= 2.0Vto 3.6V (1.5VDataRetention)

PIN AND FUNCTION COMPATIBLEWITH

74 SERIES257

LATCH-UP PERFORMANCE EXCEEDS 500mA

ESD PERFORMANCE:

■

HBM>2000V;MM> 200V

DESCRIPTION

The 74LCX257 is a low voltage CMOS QUAD 2

CHANNEL MULTIPLEXER (3-STATE) fabricated

with sub-micron silicon gate and double-layer

metal wiring C²MOS technology. It is ideal for low

power and high speed 3.3V applications. It can

be interfaced to 5V signal environment for both

inputs and outputs.

All inputs and outputs are equipped with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/9

October 1999

12 3 4 5 6 7...10

中文翻译

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