DM54LS85J National Semiconductor, DM54LS85J Datasheet

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DM54LS85J

Manufacturer Part Number
DM54LS85J
Description
4-Bit Magnitude Comparators
Manufacturer
National Semiconductor
Datasheet

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C 1995 National Semiconductor Corporation
54LS85 DM54LS85 DM74LS85
4-Bit Magnitude Comparators
General Description
These 4-bit magnitude comparators perform comparison of
straight binary or BCD codes Three fully-decoded decisions
about two 4-bit words (A B) are made and are externally
available at three outputs These devices are fully expand-
able to any number of bits without external gates Words of
greater length may be compared by connecting compara-
tors in cascade The A
stage handling less-significant bits are connected to the cor-
responding inputs of the next stage handling more-signifi-
cant bits The stage handling the least-significant bits must
Connection Diagram
Function Table
H
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
e
A3 B3
High Level L
l
k
e
e
e
e
e
e
e
e
e
e
e
e
B3
B3
B3
B3
B3
B3
B3
B3
B3
B3
B3
B3
B3
B3
e
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2 B2
Low Level X
e
e
e
e
e
e
e
e
e
e
l
k
X
X
Comparing
B2
B2
B2
B2
B2
B2
B2
B2
B2
B2
B2
B2
l
Inputs
B A
e
Dual-In-Line Package
A1
A1
A1
A1
A1
A1
A1
A1
TL F 6379
A1
A1
A1 B1
k
Don’t Care
e
e
e
e
e
e
e
e
l
k
B and A
X
X
X
X
B1
B1
B1
B1
B1
B1
B1
B1
B1
B1
e
A0
A0
A0
A0
A0
A0
A0
A0
A0 B0
B outputs of a
l
k
e
e
e
e
e
e
X
X
X
X
X
X
B0
B0
B0
B0
B0
B0
B0
B0
A
l
H
H
X
X
X
X
X
X
X
X
L
L
X
L
B
have a high-level voltage applied to the A
cascading path is implemented with only a two-gate-level
delay to reduce overall comparison times for long words
Features
Y
Y
Y
Typical power dissipation 52 mW
Typical delay (4-bit words) 24 ns
Alternate Military Aerospace device (54LS85) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Cascading
Inputs
A
TL F 6379 – 1
k
X
X
X
X
X
X
X
X
H
X
H
L
L
L
B
A
e
H
H
X
X
X
X
X
X
X
X
L
L
L
L
B
See NS Package Number E20A
Order Number 54LS85DMQB
54LS85FMQB 54LS85LMQB
DM74LS85M or DM74LS85N
J16A M16A N16E or W16A
DM54LS85J DM54LS85W
A
l
H
H
H
H
H
H
L
L
L
L
L
L
L
L
B
Outputs
RRD-B30M105 Printed in U S A
A
k
H
H
H
H
H
H
L
L
L
L
L
L
L
L
e
B
B input The
June 1989
A
e
H
H
L
L
L
L
L
L
L
L
L
L
L
L
B

Related parts for DM54LS85J

DM54LS85J Summary of contents

Page 1

... Alternate Military Aerospace device (54LS85) is avail- Y able Contact a National Semiconductor Sales Office Distributor for specifications TL F 6379 – 1 Cascading Inputs June 1989 B input The e Order Number 54LS85DMQB 54LS85FMQB 54LS85LMQB DM54LS85J DM54LS85W DM74LS85M or DM74LS85N See NS Package Number E20A J16A M16A N16E or W16A Outputs RRD-B30M105 Printed ...

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 DM54LS and 54LS DM74LS Storage Temperature Range Recommended Operating Conditions Symbol ...

Page 3

Switching Characteristics Symbol Parameter t Propagation Delay Time Any PLH Low-to-High Level Output Data Input t Propagation Delay Time Any PHL High-to-Low Level Output Data Input t Propagation Delay Time PLH Low-to-High Level Output ...

Page 4

Logic Diagram 6379 – 2 ...

Page 5

5 ...

Page 6

... Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS85DMQB or DM54LS85J Chip Carrier Package (E) Order Number 54LS85LMQB NS Package Number E20A NS Package Number J16A 6 ...

Page 7

Physical Dimensions inches (millimeters) (Continued) 16-Lead Small Outline Molded Package (M) 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS85M NS Package Number M16A Order Number DM74LS85N NS Package Number N16E 7 ...

Page 8

... 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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