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AMD (Xilinx) AM27S45A/BKA — Memory (DRAM / SRAM / Flash / EEPROM)
AMD (Xilinx)

AMD AM27S45A/BKA 16Kbit PROM, 45 ns

MPNAM27S45A/BKA
End of Life

AMD AM27S45A/BKA, 16Kbit (2K x 8) PROM, 45 ns access time, parallel interface, 4.5 V supply, -55 to 125°C, 24CFLATPK package.

$139.99Ref. price · indicative, final on quote
AM27S45A/BKA datasheet
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Specifications

AM27S45A/BKA Technical Specifications
ParameterValue
Interface_typeParallel
Mounting_typeSurface Mount
Operating temperature high-55°C to 125°C(TC)
Frame_size16Kbit
Access time45 ns
Memory_typeNon-Volatile
Package_typeBulk
Memory formatPROM
Supply_voltage_v4.5
Memory organization2K x 8

Product details

What this PROM is and where it fits

The AMD AM27S45A/BKA is a 16Kbit (2K x 8) bipolar PROM with a 45 ns access time, parallel interface, and a 4.5 V supply. Packaged in a 24-lead ceramic flatpack (24CFLATPK), it is built for surface-mount assembly on boards that demand non-volatile storage with fast read cycles. The military temperature range (-55 to 125°C) qualifies it for avionics, missile guidance, satellite, and downhole instrumentation — environments where a sealed ceramic package and wide thermal tolerance are non-negotiable.

45 ns access time — bus timing and BOM fit

The 45 ns access time and parallel interface connect directly to an 8-bit address and data bus. No serial-to-parallel conversion logic is needed.

Memory organization and programming reality

Organized as 2K x 8, the part stores firmware or lookup tables. It is a PROM — programmable once, typically at the factory or in a programming house.

Frequently asked questions

What is the closest functional second-source for the AM27S45A/BKA?

The AM27S191/BUA is the closest functional peer: same 16Kbit (2K x 8) organization, parallel interface, 4.5 V supply, military temperature range, and ceramic flatpack package, but with a 65 ns access time — 20 ns slower than the 45 ns of the AM27S45A/BKA.

Will the AM27S45A/BKA drop into a board designed for the AM27S191/BUA?

Yes, both share the same 24-lead ceramic flatpack (24CFLATPK), same pinout for parallel interface, same supply voltage, and same temperature grade. The only difference is access time: 45 ns vs 65 ns. The faster part will work in the slower socket; the reverse may require bus timing re-evaluation.