4-bit Binary Counter
HD74LS293
4-bit Binary Counter
REJ03D0477–0300 Rev.3.00
Jul.15.2005
This counter contains four master-slave flip-flop...
Description
HD74LS293
4-bit Binary Counter
REJ03D0477–0300 Rev.3.00
Jul.15.2005
This counter contains four master-slave flip-flops and additional gating to provide a divide-by-two counter and divideby-eight counter. This counter has a gated zero reset. To use the maximum count length of this counter, 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 function table.
Features
Ordering Information
Part Name HD74LS293P
Package Type DILP-14 pin
Package Code (Previous Code)
PRDP0014AB-B (DP-14AV)
Package Abbreviation
P
Taping Abbreviation (Quantity)
—
Pin Arrangement
NC 1
NC 2
NC 3
QC Outputs
QB
4 5
NC 6
GND 7
R0(2) R0(1) QC B QB A
QA QD
(Top view)
14 VCC
13 R0(2)
12 R0(1)
11 B 10 A
Inputs
9 QA Outputs
8 QD
Function Table
Reset / Count
Reset Input
R0 (1)
R0 (2)
HH
LX
XL
QD L
Outputs QC QB LL
Count Count
QA L
Rev.3.00, Jul.15.2005, page 1 of 7
HD74LS293 BCD Count Sequenc...
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