Programmable Timer IC, 16-Bit, 8MHz, 28-Pin PLCC
82C54 Series 5.5 V 10 mA 8 MHz CMOS Programmable Interval Timer - PLCC-28
Timer IC, 8MHz, 5.5V, PLCC, Surface Mount
CMOS Programmable Timer IC, 8-Bit, 28-Pin PQCC
