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74LCX540

LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS

STMicroelectronics 

74LCX540

LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE)

WITH 5V TOLERANT INPUTS AND OUTPUTS

s 5V TOLERANT INPUTS AND OUTPUTS

s HIGH SPEED :

tPD = 8.0 ns (MAX.) at VCC = 3V

s POWER DOWN PROTECTION ON INPUTS

AND OUTPUTS

s 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 540

s LATCH-UP PERFORMANCE EXCEEDS

500mA (JESD 17)

s ESD PERFORMANCE:

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

MM > 200V

DESCRIPTION

The 74LCX540 is a low voltage CMOS OCTAL

BUS BUFFER (INVERTED) 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.

PIN CONNECTION AND IEC LOGIC SYMBOLS

SOP

TSSO P

ORDER CODES

PACKAGE

SOP

TSSOP

TUBE

74LCX540M

T&R

74LCX540MTR

74LCX540TTR

The 3 STATE control gate operates as two input

AND such that if either G1 and G2 are high, all

eight outputs are in the high impedance state. In

order to enhance PC board layout the 74LCX540

offers a pinout having inputs and outputs on

opposite sides of the package.

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.

September 2001

1/9

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