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Texas Instruments 54F189FLQB — Memory (DRAM / SRAM / Flash / EEPROM)

54F189FLQB Standard SRAM, 16x4, 32 ns, CMOS

MPN54F189FLQB
End of Life

Fairchild 54F189FLQB standard SRAM, 16x4 organization, 32 ns access time, CMOS technology, Bulk package.

$9.65Ref. price · indicative, final on quote
Texas Instruments 54F189FLQB datasheet (PDF)
RoHSNot applicable
Series*
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

54F189FLQB specifications
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Product details

Part identity and function

The Fairchild 54F189FLQB is a standard SRAM organized as 16 words by 4 bits, with a 32 ns access time, built in CMOS technology. It serves as a small, fast scratchpad or cache buffer in legacy digital systems where a 16x4 memory array is sufficient — think address translation tables, microcode storage, or FIFO-like staging in older bus architectures.

What the 32 ns access time means for the bus

The 32 ns access time sets the timing budget for read cycles on the memory bus.

Frequently asked questions

What is the 54F189FLQB used for?

As a 16x4 standard SRAM with 32 ns access time, it is used as a small, fast memory buffer in legacy digital systems — for example, cache tag storage, microcode lookup tables, or FIFO staging in older bus-based designs.