REI Datasheet
SN54HC239, SN74HC239
Dual 2-Line to 4-Line Decoders/Demultiplexers
The ‘HC239 circuit is designed to be used in high-performance memory-decoding or data-routing
applications requiring very short propagation delay times. In high-performance memory systems this
decoder can be used to minimize the effects of system decoding. When employed with high-speed
memories utilizing a fast enable circuit, the delay times of this decoder and the enable time of the
memory are usually less than the typical access time of the memory. This means that the effective
system delay introduced by the decoder is negligible.
Rochester Electronics
Manufactured Components
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.
Parts are tested using original factory
test programs or Rochester developed
test solutions to guarantee product
meets or exceeds the OCM data sheet.
Quality Overview
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ISO-9001
AS9120 certification
Qualified Manufacturers List (QML) MIL-PRF-38535
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Class Q Military
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Class V Space Level
Qualified Suppliers List of Distributors (QSLD)
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Rochester is a critical supplier to DLA and
meets all industry and DLA standards.
Rochester Electronics, LLC is committed to supplying
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 12302013
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