REI Datasheet
AM27S02, AM27S03
64-Bit Inverting-Output Bipolar RAM
The AM27S02 and AM27S03 are 64-bit RAMs built using Schottky diode clamped transistors in
conjunction with internal ECL circuitry and are ideal for use in scratch pad and high-speed buffer
memory applications. Each memory is organized as a fully decoded 16-word memory of 4 bits per
word. Easy memory expansion is provided by an active-LOW chip select (CS) input and open-
collector OR-tieable outputs (AM27S02) or three-state outputs (AM27S03). Chip selection for large
memory systems can be controlled by active-LOW output decoders such as the AM74S138.
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.
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