Private company

Monolithic Memories

American semiconductor company (1969–1987)

Monolithic Memories, Inc. (MMI) was an American semiconductor company which produced bipolar PROMs, programmable logic devices, and logic circuits (including 7400 series TTL). A team of MMI engineers, under the direction of Ze'ev Drori and headed by John Birkner and H. T. Chua, invented the class of devices known as programmable array logic (PAL).2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

MMI PAL 16R6
Photo: Swtpc6800 at English Wikipedia, Public domain, via Wikimedia Commons3

Monolithic Memories, Inc. (MMI) was an American semiconductor company which produced bipolar PROMs, programmable logic devices, and logic circuits (including 7400 series TTL).2

Sources

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