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National Semiconductor Electronic Components Datasheet

74ACTQ16244 Datasheet

16-Bit Buffer/Line Driver

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March 1993
54ACTQ 74ACTQ16244
16-Bit Buffer Line Driver
with TRI-STATE Outputs
General Description
The ’ACTQ16244 contains sixteen non-inverting buffers
with TRI-STATE outputs designed to be employed as a
memory and address driver clock driver or bus oriented
transmitter receiver The device is nibble controlled Each
nibble has separate TRI-STATE control inputs which can be
shorted together for full 16-bit operation
The ’ACTQ16244 utilizes NSC Quiet Series technology to
guarantee quiet output switching and improved dynamic
threshold performance FACT Quiet SeriesTM features
GTOTM output control for superior performance
Features
Y Utilizes NSC FACT Quiet Series technology
Y Guaranteed simultaneous switching noise level and
dynamic threshold performance
Y Guaranteed pin-to-pin output skew
Y Separate control logic for each byte and nibble
Y 16-bit version of the ’ACTQ244
Y Outputs source sink 24 mA
Y Additional specs for multiple output switching
Y Output loading specs for both 50 pF and 250 pF loads
Logic Symbol
Connection Diagram
Pin Assignment for
SSOP and CERPAK
TL F 10925 – 1
Pin Description
Pin Names
Description
OEn
I0 – I15
O0 – O15
Output Enable Input (Active Low)
Inputs
Outputs
TRI-STATE is a registered trademark of National Semiconductor Corporation
FACTTM FACT Quiet SeriesTM and GTOTM are trademarks of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 10925
TL F 10925 – 2
RRD-B30M75 Printed in U S A


National Semiconductor Electronic Components Datasheet

74ACTQ16244 Datasheet

16-Bit Buffer/Line Driver

No Preview Available !

Functional Description
The ’ACTQ16244 contains sixteen non-inverting buffers
with TRI-STATE standard outputs The device is nibble (4
bits) controlled with each nibble functioning identically but
independent of the other The control pins can be shorted
together to obtain full 16-bit operation The TRI-STATE out-
Truth Tables
OE1
L
L
H
Inputs
I0 – I3
L
H
X
Outputs
O0 – O3
L
H
Z
Inputs
OE3
L
L
H
I8 – I11
L
H
X
H e High Voltage Level
L e Low Voltage Level
X e Immaterial
Z e High Impedance
Outputs
O8 – O11
L
H
Z
Logic Diagram
puts are controlled by an Output Enable (OEn) input for
each nibble When OEn is LOW the outputs are in 2-state
mode When OEn is HIGH the outputs are in the high im-
pedance mode but this does not interfere with entering new
data into the inputs
OE2
L
L
H
Inputs
I4 – I7
L
H
X
OE4
L
L
H
Inputs
I12 – I15
L
H
X
Outputs
O4 – O7
L
H
Z
Outputs
O12 – O15
L
H
Z
TL F 10925 – 1
2


Part Number 74ACTQ16244
Description 16-Bit Buffer/Line Driver
Maker National Semiconductor
Total Page 8 Pages
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