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DM54L93 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DM54L93
Description  Decade, Divide-by-12, and Binary Counters
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DM54L93 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLF6637
June 1989
DM54L93
Decade Divide-by-12 and Binary Counters
General Description
Each of these monolithic counters contains four master-
slave flip-flops and additional gating to provide a divide-by-
two counter and a three-stage binary counter for which the
count cycle length is divide-by-eight
To use their maximum count length (decade divide-by-
twelve or four-bit binary) the B input is connected to the QA
output The input count pulses are applied to input A and the
outputs are as described in the appropriate truth table
Features
Y
Typical power dissipation 16 mW
Y
Count frequency 15 MHz
Connection Diagram
Dual-In-Line Package
TLF6637 – 1
Order Number DM54L93J or DM54L93W
See NS Package Number J14A or W14B
Function Tables
COUNT SEQUENCE
(See Note A)
Count
Output
QD
QC
QB
QA
0L
L
L
L
1L
L
L
H
2L
L
H
L
3L
L
H
H
4L
H
L
L
5L
H
L
H
6L
H
H
L
7L
H
H
H
8H
L
L
L
9H
L
L
H
10
H
L
H
L
11
H
L
H
H
12
H
H
L
L
13
H
H
L
H
14
H
H
H
L
15
H
H
H
H
RESETCOUNT TRUTH TABLE (Note B)
Reset Inputs
Output
R0(1)
R0(2)
QD
QC
QB
QA
HH
L
L
L
L
L
X
COUNT
X
L
COUNT
Note A
Output QA is connected to input B
Note B
H e High Level L e Low Level X e Don’t Care
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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