PLS173

Philips Semiconductors Programmable Logic Devices Product specification Programmable logic array (22 × 42 × 10) PLS173 DESCRIPTION The PLS173 is a two-level logic element consisting of 42 AND gates and 10 OR gates with fusible link connections for programming I/O polarity and direction. All AND gates are linked to 12 inputs (I) and 10 bidirectional I/O lines (B). These yield variable I/O gate configurations via 10 direction control gates (D), ranging from 22 inputs to 10 outputs. On-chip T/C buffers couple either True (I, B) or Complement (I, B) input polarities to all AND gates, whose outputs can be optionally linked to all OR gates. Their output polarity, in turn, is individually programmable through a set of EX-OR gates for implementing AND/OR or AND/NOR logic functions. The PLS173 is field programmable, enabling the user to quickly generate custom patterns using standard programming equipment. Order codes for this device are listed below. FEATURES I/O propagation delay: 30ns (max.) 12 inputs 42 AND gates 10 OR gates 10 bidirectional I/O lines Active-High or -Low outputs 42 product terms: – 32 logic terms – 10 control terms PIN CONFIGURATIONS N Package I0 1 I1 2 I2 3 I3 4 I4 5 I5 6 I6 7 I7 8 I8 9 I9 10 I10 11 GND 12 N = Plastic DIP (300mil-wide) 24 VCC 23 B9 22 B8 21 B7 20 B6 19 B5 18 B4 17 B3 16 B2 15 B1 14 B0 13 I11 Ni-Cr programmable links Input loading: –100µA (max.) Power dissipation: 750mW (typ.) 3-State outputs TTL compatible APPLICAT...