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