Editing Programmable Array Logic (section)

==Process technologies==
Early PALs were 20-pin [[Dual in-line package|DIP]] components fabricated in silicon using bipolar transistor technology with one-time programmable (OTP) titanium-tungsten programming fuses.<ref name="TI PAL 16R8">{{Cite book |title=TIBPAL 16R8-15C Data Sheet |publisher=Texas Instruments |orig-year=February 1984| date=April 2000 |location=Dallas TX |url=http://focus.ti.com/lit/ds/symlink/tibpal16r8-15c.pdf}} "These IMPACT circuits combine the latest Advanced Low-Power Schottky technology with proven titanium-tungsten fuses to provide reliable, high-performance substitutes for conventional TTL logic." TI was a second source vendor for the MMI PALS.</ref> Later devices were manufactured by [[Cypress Semiconductor|Cypress]], [[Lattice Semiconductor]] and [[Advanced Micro Devices]] using [[CMOS]] technology.

The original 20- and 24-pin PALs were denoted by MMI as [[medium-scale integration]] (MSI) devices.