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