MC74VHCT138A Motorola, MC74VHCT138A Datasheet

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MC74VHCT138A

Manufacturer Part Number
MC74VHCT138A
Description
3-to-8 Line Decoder
Manufacturer
Motorola
Datasheet

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
3-to-8 Line Decoder
fabricated with silicon gate CMOS technology. It achieves high speed
operation similar to equivalent Bipolar Schottky TTL while maintaining
CMOS low power dissipation.
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.
as a level converter for interfacing 3.3V to 5.0V, because they have full 5V
CMOS level output swings.
between 0V and 5.5V are applied, regardless of the supply voltage. The
output structures also provide protection when V CC = 0V. These input and
output structures help prevent device destruction caused by supply voltage
– input/output voltage mismatch, battery backup, hot insertion, etc.
6/97
E3
H = high level (steady state); L = low level (steady state); X = don’t care
H
H
H
H
H
H
H
H
X
X
L
Motorola, Inc. 1997
The MC74VHCT138A is an advanced high speed CMOS 3–to–8 decoder
When the device is enabled, three Binary Select inputs (A0 – A2)
The VHCT inputs are compatible with TTL levels. This device can be used
The VHCT138A input structures provide protection when voltages
High Speed: t PD = 7.6ns (Typ) at V CC = 5V
Low Power Dissipation: I CC = 4 A (Max) at T A = 25 C
TTL–Compatible Inputs: V IL = 0.8V; V IH = 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
E2 E1 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X
H
X
L
L
L
L
L
L
L
L
H
X
X
Inputs
L
L
L
L
L
L
L
L
X
X
X
H
H
H
H
L
L
L
L
FUNCTION TABLE
X
X
X
H
H
H
H
L
L
L
L
H
H
H
H
X
X
X
L
L
L
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
Outputs
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
1
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
ENABLE
INPUTS
SELECT
INPUTS
E3
E2
E1
A0
A1
A2
1
2
3
6
5
4
REV 0
MC74VHCT138A
MC74VHCTXXXAD
MC74VHCTXXXADT
MC74VHCTXXXAM
16–LEAD SOIC EIAJ PACKAGE
16–LEAD TSSOP PACKAGE
ORDERING INFORMATION
16–LEAD SOIC PACKAGE
GND
A0
A1
A2
E1
E2
E3
Y7
PIN ASSIGNMENT
CASE 751B–05
CASE 948F–01
CASE 966–01
DT SUFFIX
1
2
3
4
5
6
7
8
M SUFFIX
D SUFFIX
LOGIC DIAGRAM
15
14
13
12
10
11
9
7
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
16
15
14
13
12
10
11
9
SOIC
TSSOP
SOIC EIAJ
V CC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
ACTIVE–LOW
OUTPUTS

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MC74VHCT138A Summary of contents

Page 1

... MOTOROLA SEMICONDUCTOR TECHNICAL DATA 3-to-8 Line Decoder 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 – ...

Page 2

... MC74VHCT138A MOTOROLA EXPANDED LOGIC DIAGRAM VHC Data – Advanced CMOS Logic DL203 — Rev 1 ...

Page 3

... MC74VHCT138A This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high– ...

Page 4

... MC74VHCT138A Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î AC ELECTRICAL CHARACTERISTICS Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...

Page 5

... N 0.25 (0.010 DETAIL E H DETAIL MC74VHCT138A NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION ...

Page 6

... BSC 0.050 BSC 7.40 8.20 0.291 0.323 L 0.50 0.85 0.020 0.033 L E 1.10 1.50 0.043 0.059 0.70 0.90 0.028 0.035 Z ––– 0.78 ––– 0.031 Mfax is a trademark of Motorola, Inc. MC74VHCT138A/D VHC Data – Advanced CMOS Logic DL203 — Rev 1 ...

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