MC74VHCT540A_06 Datasheet, PDF (1/7 Pages) ON Semiconductor – Octal Bus Buffer

MC74VHCT540A
Octal Bus Buffer
Inverting
The MC74VHCT540A is an advanced high speed CMOS inverting
octal bus buffer fabricated with silicon gate CMOS technology. It
achieves high speed operation similar to equivalent Bipolar Schottky
TTL while maintaining CMOS low power dissipation.
The MC74VHCT540A features inputs and outputs on opposite
sides of the package and two AND−ed active−low output enables.
When either OE1 or OE2 are high, the terminal outputs are in the
high impedance state.
The VHCT inputs are compatible with TTL levels. This device can
be used as a level converter for interfacing 3.3 V to 5.0 V, because it
has full 5.0 V CMOS level output swings.
The VHCT540A input and output (when disabled) structures
provide protection when voltages between 0 V and 5.5 V are applied,
regardless of the supply voltage. These input and output structures
help prevent device destruction caused by supply voltage −
input/output voltage mismatch, battery backup, hot insertion, etc.
The internal circuit is composed of three stages, including a buffer
output which provides high noise immunity and stable output. The
inputs tolerate voltages up to 7.0 V, allowing the interface of 5.0 V
systems to 3.0 V systems.
Features
• High Speed: t_PD = 3.7 ns (Typ) at V_CC = 5.0 V
• Low Power Dissipation: I_CC = 4.0 μA (Max) at T_A = 25°C
• TTL−Compatible Inputs: V_IL = 0.8 V; V_IH = 2.0 V
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 2.0 V to 5.5 V Operating Range
• Low Noise: V_OLP = 1.2 V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300 mA
• ESD Performance: HBM > 2000 V; Machine Model > 200 V
• Chip Complexity: 124 FETs or 31 Equivalent Gates
w These devices are available in Pb−free package(s). Specifications herein
apply to both standard and Pb−free devices. Please see our website at
www.onsemi.com for specific Pb−free orderable part numbers, or contact
your local ON Semiconductor sales office or representative.
http://onsemi.com
MARKING
DIAGRAMS
20
1
SOIC
DW SUFFIX
CASE 751D
VHCT540A
AWLYYWW
20
1
TSSOP
DT SUFFIX
CASE 948E
VHCT
540A
ALYW
20
1
SOIC EIAJ
M SUFFIX
CASE 967
74VHCT540
AWLYWW
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
FUNCTION TABLE
Inputs
OE1 OE2
A
Output Y
L
L
L
H
L
L
H
L
H
X
X
Z
X
H
X
Z
ORDERING INFORMATION
Device
Package Shipping
MC74VHCT540ADW SOIC
38 Units/Rail
MC74VHCT540ADT TSSOP 75 Units/Rail
MC74VHCT540AM
SOIC
50 Units/Rail
© Semiconductor Components Industries, LLC, 2006
1
March, 2006 − Rev. 4
Publication Order Number:
MC74VHCT540A/D