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DM5490 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DM5490
Description  Decade and Binary Counters
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DM5490 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLF6533
July 1992
DM5490DM7490A DM7493A
Decade 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-five for the 90A and divide-
by-eight for the 93A
All of these counters have a gated zero reset and the 90A
also has gated set-to-nine inputs for use in BCD nine’s com-
plement applications
To use their maximum count length (decade or four-bit bina-
ry) 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 A symmetrical di-
vide-by-ten count can be obtained from the 90A counters by
connecting the QD output to the A input and applying the
input count to the B input which gives a divide-by-ten square
wave at output QA
Features
Y
Typical power dissipation
90A
145 mW
93A
130 mW
Y
Count frequency 42 MHz
Connection Diagrams
Dual-In-Line Package
TLF6533 – 1
Order Number DM5490J DM5490W or DM7490AN
See NS Package Number J14A N14A or W14B
Dual-In-Line Package
TLF6533 – 2
Order Number DM7493AN
See NS Package Number N14A
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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