SY100E016

Micrel, Inc. 8-BIT SYNCHRONOUS BINARY UP COUNTER SY10E016 SY1S0YE10001E6016 SY100E016 FEATURES s 700MHz min. count frequency s Extended 100E VEE range of –4.2V to –5.5V s 1000ps CLK to Q, TC s Internal, gated TC feedback s 8 bits wide s Fully synchronous counting and TC generation s Asynchronous Master Reset s Fully compatible with industry standard 10KH, 100K I/O levels s Internal 75KΩ input pulldown resistors s Fully compatible with Motorola MC10E/100E016 s Available in 28-pin PLCC package DESCRIPTION The SY10/100E016 are high-speed synchronous, presettable and cascadable 8-bit binary counters designed for use in new, high-performance ECL systems. Architecture and operation are the same as the Motorola MC10H016 in the MECL 10KH family, extended to 8 bits, as shown in the logic diagram. The counters feature internal feedback of TC, gated by the TCLD (terminal count load) pin. When TCLD is LOW, the TC feedback is disabled and counting proceeds continuously, with TC going LOW to indicate an all-HlGH state. When TCLD is HIGH, the TC feedback causes the counter to automatically reload upon TC = LOW, thus functioning as a programmable counter. PIN NAMES Pin P0-P7 Q0-Q7 CE PE MR CLK TC TCLD VCCO Function Parallel Data (Preset) Inputs Data outputs Count Enable Control Input Parallel Load Enable Control Input Master Reset Clock Terminal Count Output TC-Load Control Input VCC to Output M9999-032006 [email protected] or (408) 955-1690 1 Rev.: G Amendment: /0 Issue Date: Mar...