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54LS244 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54LS244
Description  Octal TRI-STATEE Buffers/Line Drivers/Line Receivers
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

54LS244 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLF8442
August 1989
54LS244DM74LS244 Octal TRI-STATE
BuffersLine DriversLine Receivers
General Description
These buffersline drivers are designed to improve both the
performance and PC board density of TRI-STATE buffers
drivers employed as memory-address drivers clock drivers
and bus-oriented transmittersreceivers Featuring 400 mV
of hysteresis at each low current PNP data line input they
provide improved noise rejection and high fanout outputs
and can be used to drive terminated lines down to 133X
Features
Y
TRI-STATE outputs drive bus lines directly
Y
PNP inputs reduce DC loading on bus lines
Y
Hysteresis at data inputs improves noise margins
Y
Typical IOL (sink current)
54LS
12 mA
74LS
24 mA
Y
Typical IOH (source current)
54LS
b
12 mA
74LS
b
15 mA
Y
Typical propagation delay times
Inverting
105 ns
Noninverting
12 ns
Y
Typical enabledisable time 18 ns
Y
Typical power dissipation (enabled)
Inverting
130 mW
Noninverting
135 mW
Connection Diagram
Dual-In-Line Package
TLF8442 – 1
Order Number 54LS244DMQB 54LS244FMQB 54LS244LMQB
DM74LS244WM or DM74LS244N
See NS Package Number E20A J20A M20B N20A or W20A
Function Table
Inputs
Output
G
AY
LL
L
LH
H
HX
Z
L e Low Logic Level
H e High Logic Level
X e Either Low or High Logic Level
Z e High Impedance
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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