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MC74VHCT138ADTMOTOROLAN/a15avai3-to-8 Line Decoder


MC74VHCT138ADT ,3-to-8 Line Decoder**SEMICONDUCTOR TECHNICAL DATA * *The MC74VHCT138A is an advanced high speed CMOS 3–to–8 decoderfab ..
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MC74VHCT138ADT
3-to-8 Line Decoder
SEMICONDUCTOR TECHNICAL DATA -
The MC74VHCT138A is an advanced high speed CMOS 3–to–8 decoder
fabricated with silicon gate CMOS technology. It achieves high speed
operation similar to equivalent Bipolar Schottky TTL while maintaining
CMOS low power dissipation.
When the device is enabled, three Binary Select inputs (A0 – A2)
determine which one of the outputs (Y0 – Y7) will go Low. When enable input
E3 is held Low or either E2 or E1 is held High, decoding function is inhibited
and all outputs go high. E3, E2, and E1 inputs are provided to ease cascade
connection and for use as an address decoder for memory systems.
The VHCT inputs are compatible with TTL levels. This device can be used
as a level converter for interfacing 3.3V to 5.0V, because they have full 5V
CMOS level output swings.
The VHCT138A input structures provide protection when voltages
between 0V and 5.5V are applied, regardless of the supply voltage. The
output structures also provide protection when VCC = 0V. These input and
output structures help prevent device destruction caused by supply voltage
– input/output voltage mismatch, battery backup, hot insertion, etc. High Speed: tPD = 7.6ns (Typ) at VCC = 5V Low Power Dissipation: ICC = 4μA (Max) at TA = 25°C TTL–Compatible Inputs: VIL = 0.8V; VIH = 2.0V Power Down Protection Provided on Inputs and Outputs Balanced Propagation Delays Designed for 4.5V to 5.5V Operating Range Pin and Function Compatible with Other Standard Logic Families Latchup Performance Exceeds 300mA ESD Performance: HBM > 2000V; Machine Model > 200V Chip Complexity: 122 FETs or 30.5 Equivalent Gates Y6
ACTIVE–LOW
OUTPUTS
SELECT
INPUTS
ENABLE
INPUTS
FUNCTION TABLE
LOGIC DIAGRAM
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