DESCRIPTION

The PLUS405-55 device is a bipolar, programmable state machine of the Mealy type. Both the AND and the OR array are user-programmable. All 64 AND gates are connected to the 16 external dedicated inputs (I0 - I15) and to the feedback paths of the 8 on-chip State Registers (QP0 - QP7). Two complement arrays support complex IF-THEN-ELSE state transitions with a single product term (input variables C0, C1).

FEATURES

? 66.7MHz minimum guaranteed clock rate

? 55MHz minimum guaranteed operating frequency (1/(tIS1 + tCKO1)

? Functional superset of PLS105/105A

? Field-programmable (Ti-W fusible link)

? 16 input variables

? 8 output functions

? 64 transition terms

? 8-bit State Register

? 8-bit Output Register

? 2 transition Complement Arrays

? Multiple clocks

? Programmable Asynchronous Initialization or Output Enable

? Power-on preset of all registers to “1”

? “On-chip” diagnostic test mode features for access to state and output registers

? 950mW power dissipation (typ.)

? TTL compatible

? J-K or S-R flip-flop functions

? Automatic “Hold” states

? 3-State outputs

APPLICATIONS

? Interface protocols

? Sequence detectors

? Peripheral controllers

? Timing generators

? Sequential circuits

? Elevator contollers

? Security locking systems

? Counters

? Shift registers