REI Datasheet
SN54290, SN54293, SN54LS290, SN54LS293
SN74290, SN74293, SN74LS290, SN74LS293
Decade and 4-Bit Binary Counters
The SN54290/SN74290, SN54LS290/SN74LS290, SN54293/SN74293, and SN54LS293/
SN74LS293 counters are electrically and functionally identical to the SN5490A/SN7490A,
SN54LS90/SN74LS90, SN5493A/SN7493A, and SN54LS93/SN74LS93, respectively. Only the
arrangement of the terminals has been changed for the ‘290, ‘LS290, ‘293, and ‘LS293.
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 ‘290 and ‘LS290 and divide-by-eight for the ‘293 and ‘LS293. All of these
counters have a gated zero reset and the ‘290 and ‘LS290 also have gated set-to-nine inputs for use
in BCD nine’s complement applications.
Quality Overview
Rochester Electronics
Manufactured Components
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ISO-9001
AS9120 certification
Qualified Manufacturers List (QML) MIL-PRF-38535
Rochester branded components are
manufactured using either die/wafers
purchased from the original suppliers
or Rochester wafers recreated from the
original IP. All recreations are done with
the approval of the OCM.
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Class Q Military
Class V Space Level
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Qualified Suppliers List of Distributors (QSLD)
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Rochester is a critical supplier to DLA and
meets all industry and DLA standards.
Parts are tested using original factory
test programs or Rochester developed
test solutions to guarantee product
meets or exceeds the OCM data sheet.
RochesterElectronics, LLCiscommittedtosupplying
products that satisfy customer expectations for
quality and are equal to those originally supplied by
industry manufacturers.
The original manufacturer’s datasheet accompanying this document reflects the performance
and specifications of the Rochester manufactured version of this device. Rochester Electronics
guarantees the performance of its semiconductor products to the original OEM specifications.
‘Typical’ values are for reference purposes only. Certain minimum or maximum ratings may be
based on product characterization, design, simulation, or sample testing.
© 2013 Rochester Electronics, LLC. All Rights Reserved 12192013
To learn more, please visit www.rocelec.com
ROCHESTER [ Rochester Electronics ]
