10H20EV8/10020EV8

The 10H20EV8/10020EV8 is an ultrahigh-speed universal ECL PAL device.Combining versatile output macrocells with astandard AND/OR singleprogrammablearray, this device is ideal in implementing auser's custom logic. The use of PhilipsSemiconductors state-of-the-art bipolar oxide
isolation process enables the10H20EV8/10020EV8 to achieve optimumspeed in any design. The SNAP designsoftware package from PhilipsSemiconductors simplifies design entrybased upon Boolean or state equations.

The 10H20EV8/10020EV8 is a two-level logicelement comprised of 11 fixed inputs, aninput pin that can either be used as a clock or12th input, 90 AND gates, and 8 Output LogicMacrocells. Each Output Macrocell can beindividually configured as a dedicated input,dedicated output with polarity control, abidirectional I/O, or as a registered outputthat has both output polarity control andfeedback to the AND array. This gives thepart the capability of having up to 20 inputsand eight outputs.

The 10H20EV8/10020EV8 has a variablenumber of product terms that can be OR'dper output. Four of the outputs have 12 ANDterms available and the other four have 8terms per output. This allows the designer theextra flexibility to implement those functionsthat he couldn't in a standard P
AL device.Asynchronous Preset and Reset productterms are also included for system designease. Each output has a separate outputenable product term. Another feature addedfor the system designer is a power-up Reseton all registered outputs.

The 10H20EV8/10020EV8 also features theability to Preload the registers to any desiredstate during testing. The Preload is notaffected by the pattern within the device, socan be performed at any step in the testingsequence. This permits full logical verificationeven after the device has been patterned.