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Semiconductor Components Industries, LLC, 2002
March, 2002 – Rev. 8
1 Publication Order Number:
MC74VHC1GT126/D
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.
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
circuits. The output structures also provide protection when V
CC
= 0 V.
These input and output structures help prevent device destruction caused
by supply voltage – input/output voltage mismatch, battery backup, hot
insertion, etc.
• High Speed: t
PD
= 3.5 ns (Typ) at V
CC
= 5 V
• Low Power Dissipation: I
CC
= 1 µA (Max) at T
A
= 25°C
• TTL–Compatible Inputs: V
IL
= 0.8 V; V
IH
= 2.0 V
• CMOS–Compatible Outputs: V
OH
> 0.8 V
CC
; V
OL
< 0.1 V
CC
@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
Figure 1. Pinout (Top View)
IN A
OUT Y
V
CC
OE
IN A
OUT YGND
OE
Figure 2. Logic Symbol
1
2
3
4
5
PIN ASSIGNMENT
1
2
3 GND
OE
IN A
4
5V
CC
OUT Y
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
ORDERING INFORMATION
FUNCTION TABLE
L
H
X
A Input Y Output
L
H
Z
OE Input
H
H
L
SC–88A / SOT–353/SC–70
DF SUFFIX
CASE 419A
Pin 1
d = Date Code
W3
d
TSOP–5/SOT–23/SC–59
DT SUFFIX
CASE 483
Pin 1
d = Date Code
W3
d
MARKING
DIAGRAMS
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