dm74ls192 National Semiconductor Corporation, dm74ls192 Datasheet

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dm74ls192

Manufacturer Part Number
dm74ls192
Description
54ls192/dm74ls192 Up/down Decade Counter With Separate Up/down Clocks
Manufacturer
National Semiconductor Corporation
Datasheet
C 1995 National Semiconductor Corporation
54LS192 DM74LS192 Up Down Decade Counter
with Separate Up Down Clocks
General Description
The ’LS192 is an up down BCD decade (8421) counter
Separate Count Up and Count Down Clocks are used and in
either counting mode the circuits operate synchronously
The outputs change state synchronous with the LOW-to-
HIGH transitions on the clock inputs
Connection Diagram
Pin Names
CP
CP
MR
PL
P0 – P3
Q0 – Q3
TC
TC
Order Number 54LS192DMQB 54LS192FMQB
54LS192LMQB DM74LS192M or DM74LS192N
U
D
D
U
See NS Package Number E20A J16A
Dual-In-Line Package
M16A N16E or W16A
Count Up Clock Input
(Active Rising Edge)
Count Down Clock Input
(Active Rising Edge)
Asynchronous Master Reset Input
(Active HIGH)
Asynchronous Parallel Load Input
(Active LOW)
Parallel Data Inputs
Flip-Flop Outputs
Terminal Count Down (Borrow)
Output (Active LOW)
Terminal Count Up (Carry)
Output (Active LOW)
TL F 10178
Description
TL F 10178 – 1
Separate Terminal Count Up and Terminal Count Down out-
puts are provided which are used as the clocks for a subse-
quent stage without extra logic thus simplifying multistage
counter designs Individual preset inputs allow the circuits to
be used as programmable counters Both the Parallel Load
(PL) and the Master Reset (MR) inputs asynchronously
override the clocks
Logic Symbol
H
L
X
e
e
e
MR
H
L
L
L
L
LOW Voltage Level
Immaterial
HIGH Voltage Level
PL
X
H
H
H
L
Mode Select Table
CP
L
H
H
X
X
V
GND
U
CC
e
e
Pin 16
Pin 8
CP
L
X
X
H
H
D
RRD-B30M105 Printed in U S A
Reset (Asyn )
Preset (Asyn )
No Change
Count Up
Count Down
Mode
TL F 10178 – 2
May 1992

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dm74ls192 Summary of contents

Page 1

... DM74LS192 Up Down Decade Counter with Separate Up Down Clocks General Description The ’LS192 down BCD decade (8421) counter Separate Count Up and Count Down Clocks are used and in either counting mode the circuits operate synchronously The outputs change state synchronous with the LOW-to- ...

Page 2

... Max Max 54LS (Note 2) DM74 b V Max MR PL GND Other Inputs DM74LS192 Units Min Nom Max ...

Page 3

Switching Characterisitcs (See Section 1 for waveforms and load configurations Symbol Parameter f Maximum Count Frequency max t Propagation Delay PLH PHL ...

Page 4

Logic Diagram 4 ...

Page 5

5 ...

Page 6

Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS192LMQB NS Package Number E20A Order Number 54LS192DMQB 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 DM74LS192M NS Package Number M16A Order Number DM74LS192N NS Package Number N16E 7 ...

Page 8

Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR ...

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