54LS244DMQB National Semiconductor, 54LS244DMQB Datasheet

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54LS244DMQB

Manufacturer Part Number
54LS244DMQB
Description
Octal tri-state buffers/line drivers/line receivers
Manufacturer
National Semiconductor
Datasheet

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C 1995 National Semiconductor Corporation
54LS244 DM74LS244 Octal TRI-STATE
Buffers Line Drivers Line Receivers
General Description
These buffers line 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 transmitters receivers 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 133
Features
Y
Y
Y
Connection Diagram
Function Table
TRI-STATE is a registered trademark of National Semiconductor Corporation
TRI-STATE outputs drive bus lines directly
PNP inputs reduce DC loading on bus lines
Hysteresis at data inputs improves noise margins
Order Number 54LS244DMQB 54LS244FMQB 54LS244LMQB
TL F 8442
See NS Package Number E20A J20A M20B N20A or W20A
L
H
X
Z
e
e
e
e
DM74LS244WM or DM74LS244N
Low Logic Level
Either Low or High Logic Level
High Impedance
High Logic Level
G
H
L
L
Inputs
Dual-In-Line Package
A
H
L
X
Y
Y
Y
Y
Y
Typical I
Typical I
Typical propagation delay times
Typical enable disable time 18 ns
Typical power dissipation (enabled)
54LS
74LS
54LS
74LS
Inverting
Noninverting
Inverting
Noninverting
Output
Y
H
L
Z
OL
OH
(sink current)
12 mA
24 mA
b
b
(source current)
12 mA
15 mA
10 5 ns
12 ns
130 mW
135 mW
TL F 8442 – 1
RRD-B30M105 Printed in U S A
August 1989

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54LS244DMQB Summary of contents

Page 1

... PNP inputs reduce DC loading on bus lines Y Hysteresis at data inputs improves noise margins Y Connection Diagram Order Number 54LS244DMQB 54LS244FMQB 54LS244LMQB See NS Package Number E20A J20A M20B N20A or W20A Function Table TRI-STATE is a registered trademark of National Semiconductor Corporation C 1995 National Semiconductor Corporation TL F 8442 ...

Page 2

... Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Input Voltage Operating Free Air Temperature Range 54LS b DM74LS Storage Temperature Range b Recommended Operating Conditions Symbol Parameter V Supply Voltage ...

Page 3

Switching Characteristics Symbol Parameter t Propagation Delay Time PLH Low to High Level Output t Propagation Delay Time PHL High to Low Level Output t Output Enable Time to PZL Low Level t Output Enable Time to PZH High Level ...

Page 4

... Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) 20-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS244LMQB NS Package Number E20A Order Number 54LS244DMQB NS Package Number J20A 4 ...

Page 5

Physical Dimensions inches (millimeters) (Continued) 20-Lead Wide Small Outline Molded Package (M) 20-Lead Molded Dual-In-Line Package (N) Order Number DM74LS244WM NS Package Number M20B Order Number DM74LS244N NS Package Number N20A 5 ...

Page 6

... Hong Kong Ltd 49) 0-180-530 85 86 13th Floor Straight Block a Ocean Centre 5 Canton Rd 49) 0-180-530 85 85 Tsimshatsui Kowloon a Tel ( 49) 0-180-532 78 32 Hong Kong a 49) 0-180-532 93 58 Tel (852) 2737-1600 a Tel ( 49) 0-180-534 16 80 Fax (852) 2736-9960 a National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 ...

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