MC74VHC1GT126
Noninverting Buffer /
CMOS Logic Level Shifter
with LSTTL−Compatible Inputs
The MC74VHC1GT126 is a single gate noninverting 3−state 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 MC74VHC1GT126 requires the 3−state control input (OE) to be
set Low to place the output into the high impedance state.
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MARKING
DIAGRAMS
The device input is compatible with TTL−type input thresholds and the
output has a full 5 V CMOS level output swing. The input protection
circuitry on this device allows overvoltage tolerance on the input,
allowing the device to be used as a logic−level translator from 3.0 V
CMOS logic to 5.0 V CMOS Logic or from 1.8 V CMOS logic to 3.0 V
CMOS Logic while operating at the high−voltage power supply.
The MC74VHC1GT126 input structure provides protection when
voltages up to 7V are applied, regardless of the supply voltage. This
allows the MC74VHC1GT126 to be used to interface 5 V circuits to 3 V
SC−88A / SOT−353/SC−70
DF SUFFIX
W3d
CASE 419A
Pin 1
d = Date Code
TSOP−5/SOT−23/SC−59
DT SUFFIX
W3d
circuits. The output structures also provide protection when V = 0 V.
CC
CASE 483
These input and output structures help prevent device destruction caused
by supply voltage − input/output voltage mismatch, battery backup, hot
insertion, etc.
Pin 1
d = Date Code
• High Speed: t = 3.5 ns (Typ) at V = 5 V
PD
CC
• Low Power Dissipation: I = 1 mA (Max) at T = 25°C
CC
A
PIN ASSIGNMENT
• TTL−Compatible Inputs: V = 0.8 V; V = 2.0 V
IL
IH
1
2
3
4
5
OE
IN A
• CMOS−Compatible Outputs: V > 0.8 V ; V < 0.1 V @Load
• Power Down Protection Provided on Inputs and Outputs
• Balanced Propagation Delays
• Pin and Function Compatible with Other Standard Logic Families
• Chip Complexity: FETs = 62; Equivalent Gates = 16
OH
CC
OL
CC
GND
OUT Y
V
CC
FUNCTION TABLE
OE Input
A Input
Y Output
OE
IN A
GND
5
4
V
CC
1
2
3
L
H
X
H
H
L
L
H
Z
OUT Y
Figure 1. Pinout (Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
OE
IN A
OUT Y
Figure 2. Logic Symbol
Semiconductor Components Industries, LLC, 2002
1
Publication Order Number:
December, 2003 − Rev. 9
MC74VHC1GT126/D