1/9August 2001
■ HIGH SPEED:
t
PD
= 12ns (TYP.) at V
CC
= 4.5V
■ LOW POWER DISSIPATION:
I
CC
= 4µA(MAX.) at T
A
=25°C
■ COMPATIBLE WITH TTL OUTPUTS :
V
IH
= 2V (MIN.) V
IL
= 0.8V (MAX)
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 6mA (MIN)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 540
DESCRIPTION
The 74HCT540 is an advanced high-speed
CMOS OCTAL BUS BUFFER (3-STATE)
fabricated with silicon gate C
2
MOS technology.
The M74HCT540 is an inverting buffer.
The 3-STATE control gate operates as a two input
AND such that if either G1
and G2 are high, all
eight output are in the high impedance state. In
order to enhance PC board layout the
M74HCT540 offer a pinout having inputs and
outputs on opposite sides of the package.
The M74HCT540 is designed to directly interface
HSC
2
MOS systems with TTL and NMOS
components.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M74HCT540
OCTAL BUS BUFFER
WITH 3 STATE OUTPUTS (INVERTED)
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE TUBE T & R
DIP M74HCT540B1R
SOP M74HCT540M1R M74HCT540RM13TR
TSSOP M74HCT540TTR
TSSOPDIP SOP
