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Renesas Electronics Components Datasheet

HD74LS293 Datasheet

4-bit Binary Counter

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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 divide-
by-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


Renesas Electronics Components Datasheet

HD74LS293 Datasheet

4-bit Binary Counter

No Preview Available !

HD74LS293
BCD Count Sequence
Count
QD
0L
1L
2L
3L
4L
5L
6L
7L
8H
9H
10 H
11 H
12 H
13 H
14 H
15 H
Notes: 1. H; high level, L; low level, X; irrelevant
2. Output QA is connected to input B.
Block Diagram
Input A
Input B
R0(1)
R0(2)
Outputs
QC QB
LL
LL
LH
LH
HL
HL
HH
HH
LL
LL
LH
LH
HL
HL
HH
HH
JQ
CK
K
JQ
CK
K
JQ
CK
K
JQ
CK
K
QA
QB
QC
QD
QA
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
Rev.3.00, Jul.15.2005, page 2 of 7


Part Number HD74LS293
Description 4-bit Binary Counter
Maker Renesas
Total Page 8 Pages
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