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MC74VHCT244A Datasheet(PDF) 1 Page - ON Semiconductor

Part No. MC74VHCT244A
Description  Octal Bus Buffer/Line Driver with 3-State Outputs
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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MC74VHCT244A Datasheet(HTML) 1 Page - ON Semiconductor

   
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
1
REV 0
© Motorola, Inc. 1997
6/97
Octal Bus Buffer/Line Driver
with 3-State Outputs
The MC74VHCT244A is an advanced high speed CMOS 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 MC74VHCT244A is a noninverting 3–state buffer, and has two
active–low output enables. This device is designed to be used with 3–state
memory address drivers, etc.
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 it has full 5V CMOS
level output swings.
The VHCT244A input and output (when disabled) structures provide
protection when voltages between 0V and 5.5V 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.
• High Speed: tPD = 5.6ns (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
• Low Noise: VOLP = 1.1V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300mA
• ESD Performance: HBM > 2000V; Machine Model > 200V
• Chip Complexity: 112 FETs or 28 Equivalent Gates
LOGIC DIAGRAM
DATA
INPUTS
A1
A2
A3
A4
B1
B2
B3
B4
17
15
13
11
8
6
4
218
16
14
12
9
7
5
3
YB4
YB3
YB2
YB1
YA4
YA3
YA2
YA1
NONINVERTING
OUTPUTS
OUTPUT
ENABLES
OEA
OEB
1
19
MC74VHCT244A
PIN ASSIGNMENT
A3
A2
YB4
A1
OEA
GND
YB1
A4
YB2
YB3
5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
11
12
13
YA2
B4
YA1
OEB
VCC
B1
YA4
B2
YA3
B3
DW SUFFIX
20–LEAD SOIC PACKAGE
CASE 751D–04
ORDERING INFORMATION
MC74VHCTXXXADW
MC74VHCTXXXADT
MC74VHCTXXXAM
SOIC
TSSOP
SOIC EIAJ
DT SUFFIX
20–LEAD TSSOP PACKAGE
CASE 948E–02
M SUFFIX
20–LEAD SOIC EIAJ PACKAGE
CASE 967–01
OEA, OEB
A, B
YA, YB
L
L
H
L
H
X
L
H
Z
INPUTS
OUTPUTS
FUNCTION TABLE


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