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AMD (Xilinx) AM27S37/BUA — Memory (DRAM / SRAM / Flash / EEPROM)
AMD (Xilinx)

AMD AM27S37/BUA 8Kbit PROM, 45 ns, -55 to 125°C, 32CLCC

MPNAM27S37/BUA
End of Life

AMD AM27S37/BUA, 8Kbit (1K x 8) parallel PROM, 45 ns access time, 4.5 V supply, -55°C to 125°C military temperature range, 32CLCC surface-mount package.

$112.15Ref. price · indicative, final on quote
AM27S37/BUA datasheet
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Specifications

AM27S37/BUA Technical Specifications
ParameterValue
Interface_typeParallel
Mounting_typeSurface Mount
Operating temperature high-55°C to 125°C (TC)
Frame_size8Kbit
Access time45 ns
Memory_typeNon-Volatile
Package_typeBulk
Memory formatPROM
Supply_voltage_v4.5
Memory organization1K x 8

Product details

What this PROM is and where it fits

The AMD AM27S37/BUA is a 8Kbit bipolar PROM organized 1K x 8, with a 45 ns access time and a parallel interface. It is a non-volatile memory intended for firmware storage, microcode lookup tables, or logic replacement in systems that are programmed once at the factory and never updated in the field. The 32CLCC hermetic package and -55°C to 125°C operating temperature range (TC) qualify it for military avionics, satellite payloads, and downhole instrumentation where sealed, high-reliability storage is required.

45 ns access time — what it means for the bus

The 45 ns access time defines the window from address valid to data valid on the bus. The sibling AM27S37A/BUA drops to 40 ns, providing extra timing margin.

Sourcing and lifecycle reality

Frequently asked questions

Will AM27S37/BUA drop into a board designed for AM27S37A/BUA?

Yes — both parts share the same 32CLCC package, 4.5 V supply, 1K x 8 organization, and -55°C to 125°C temperature grade. The only difference is access time: 45 ns on the BUA versus 40 ns on the A/BUA. The A/BUA is a direct pin-to-pin drop-in replacement with faster timing.