DESCRIPTION

The PLS159A is a 3-State output, registered logic element combining AND/OR gate arrays with clocked J-K flip-flops. These J-K flip-flops are dynamically convertible to D-type via a “fold-back” inverting buffer and control gate FC. It features 8 registered I/O outputs (F) in conjunction with 4 bidirectional I/O lines (B). These yield variable I/O gate and register configurations via control gates (D, L) ranging from 16 inputs to 12 outputs.

FEATURES

? High-speed version of PLS159

? fMAX = 18MHz

– 25MHz clock rate

? Field-Programmable (Ni-Cr link)

? 4 dedicated inputs

? 13 control gates

? 32 AND gates

? 21 OR gates

? 45 product terms:

– 32 logic terms

– 13 control terms

? 4 bidirectional I/O lines

? 8 bidirectional registers

? J-K, T, or D-type flip-flops

? Power-on reset feature on all flip-flops (Fn = 1)

? Asynchronous Preset/Reset

? Complement Array

? Active-High or -Low outputs

? Programmable OE control

? Positive edge-triggered clock

? Input loading: –100μA (max.)

? Power dissipation: 750mW (typ.)

? TTL compatible

? 3-State outputs

APPLICATIONS

? Random sequential logic

? Synchronous up/down counters

? Shift registers

? Bidirectional data buffers

? Timing function generators

? System controllers/synchronizers

? Priority encoder/registers