REI Datasheet
8155H, 8156H, 8155H-2, 8156H-2
2048-Bit Static HMOS RAM with I/O Ports and Timer
The Intel 8155H and 8156H are RAM and I/O chips implemented in N-Channel, depletion load,
silicon gate technology (HMOS), to be used in the 8085AH and 8088 microprocessor systems. The
RAM portion is designed with 2048 static cells organized as 256 x 8. They have a maximum access
time 400 ns to permit use with no wait states in 8085AH CPU. The 8155H-2 and 8156H-2 have
maximum access times of 330 ns for use with the 8085H-2 and the 5 MHz 8088 CPU.
The I/O portion consists of three general purpose I/O ports. One of the three ports can be
programmed to be status pins, thus allowing the other two ports to operate in handshake mode.
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
• Class Q Military
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Class V Space Level
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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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