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词汇 Programmable Array Logic
分类 英语词汇 英语翻译词典
释义

Programmable Array Logic

中文百科

可程序数组逻辑

MMI PAL 16R6 in 20-pin DIP
AMD 22V10 in 24-pin DIP
PALASM设计4-比特计数器

可程序化数组逻辑英语:Programmable Array Logic, PAL),是一种以CMOS的设计技术设计的可程序逻辑设备(PLD)。

在PLC问世之前,数字逻辑电路设计都是采用小规模集成(SSI)的部分,例如在7400系列的TTL(晶体管晶体管逻辑)家族;7400系列包括各种逻辑构建模块,如闸道(NOT, NAND, NOR, AND, OR),multiplexers(MUXes)及demultiplexers(DEMUXes),flip flops(D型, JK等)及其他。

PALs并非第一个商业化的PLC;Signetics在1975年已经开始销售field programmable logic array(FPLA)。但是FPLA又慢(因为同时有programmable-AND和programmable-OR arrays)又贵,无法取得市场青睐。FPLA过大也是一个原因。

英语百科

Programmable Array Logic 可程式阵列逻辑

MMI PAL 16R6 in 20-pin DIP
AMD 22V10 in 24-pin DIP
The programmable elements (shown as a fuse) connect both the true and complemented inputs to the AND gates. These AND gates, also known as product terms, are ORed together to form a sum-of-products logic array.

Programmable Array Logic (PAL) is a family of programmable logic device semiconductors used to implement logic functions in digital circuits introduced by Monolithic Memories, Inc. (MMI) in March 1978. MMI obtained a registered trademark on the term PAL for use in "Programmable Semiconductor Logic Circuits". The trademark is currently held by Lattice Semiconductor.

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