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74LCX126
(Rev.:2003)

Low Voltage Quad Buffer with 5V Tolerant Inputs and Outputs

Fairchild Semiconductor 

September 2000

Revised July 2003

74LCX126

Low Voltage Quad Buffer

with 5V Tolerant Inputs and Outputs

General Description

The LCX126 contains four independent non-inverting buff-

ers with 3-STATE outputs. Each output is disabled when

the associated output-enable (OE) input is LOW. The

inputs tolerate voltages up to 7V allowing the interface of

5V systems to 3V systems.

The 74LCX126 is fabricated with an advanced CMOS tech-

nology to achieve high speed operation while maintaining

CMOS low power dissipation.

Features

s 5V tolerant inputs and outputs

s 2.3V–3.6V VCC specifications provided

s 5.5 ns tPD max (VCC = 3.3V), 10 µA ICC max

s Power down high impedance inputs and outputs

s Supports live insertion/withdrawal (Note 1)

s ±24 mA output drive (VCC = 3.0V)

s Implements patented noise/EMI reduction circuitry

s Latch-up performance exceeds 500 mA

s ESD performance:

Human body model > 2000V

Machine model > 100V

Note 1: To ensure the high-impedance state during power up or down, OE

should be tied to GND through a pull-up resistor: the minimum value or the

resistor is determined by the current-sourcing capability of the driver.

Ordering Code:

Order Number Package Number

Package Description

74LCX126M

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

74LCX126SJ

M14D

14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74LCX126MTC

MTC14

14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Symbol

Connection Diagram

IEEE/IEC

Pin Descriptions

Pin Names

An

OEn

On

Description

Inputs

Output Enable Inputs

Outputs

Truth Table

Inputs

Output

OEn

An

On

H

L

L

H

H

H

L

X

Z

H = HIGH Voltage Level

L = LOW Voltage Level

Z = High Impedance

X = Immaterial

© 2003 Fairchild Semiconductor Corporation DS500386

www.fairchildsemi.com

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