74LCX257 datasheet(1/13 Pages) STMICROELECTRONICS

Part #	74LCX257

Description	LOW VOLTAGE CMOS QUAD 2 CHANNEL MULTIPLEXER WITH 5V TOLERANT INPUTS AND OUTPUTS (3-STATE)

PDF	13 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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September 2004

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5V TOLERANT INPUTS AND OUTPUTS

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HIGH SPEED:

tPD = 6.0 ns (MAX.) at VCC = 3V

s

POWER DOWN PROTECTION ON INPUTS

AND OUTPUTS

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SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 24mA (MIN) at VCC = 3V

s

PCI BUS LEVELS GUARANTEED AT 24 mA

s

BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s

OPERATING VOLTAGE RANGE:

VCC(OPR) = 2.0V to 3.6V (1.5V Data

Retention)

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 257

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LATCH-UP PERFORMANCE EXCEEDS

500mA (JESD 17)

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ESD PERFORMANCE:

HBM > 2000V (MIL STD 883 method 3015);

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.

It is composed of four independent 2 channel

multiplexers with common SELECT and ENABLE

(OE) INPUT. The 74LCX257 is a non-inverting

multiplexer. When the ENABLE INPUT is held

"High", all outputs become in 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.

All

inputs

and

outputs

are

equipped

with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

74LCX257

LOW VOLTAGE CMOS QUAD 2 CHANNEL MULTIPLEXER

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

Figure 1: Pin Connection And IEC Logic Symbols

Table 1: Order Codes

PACKAGE

T & R

SOP

74LCX257MTR

TSSOP

74LCX257TTR

TSSOP

SOP

Rev. 4

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74LCX257 Datasheet(PDF) 1 Page - STMicroelectronics

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