SY10E137, SY100E137 are very high speed binary ripple counters from Micrel. The device has a minimum clock frequency of 1.8GHz and can be used in various applications.
The SY10E137 and SY100E137 are high‑speed 8‑bit ripple counters offered in a 28‑pin PLCC package. They provide both synchronous and asynchronous enable pins, differential clock inputs, and a VEE output for single‑ended operation. The devices support count frequencies up to 2.2 GHz while maintaining moderate power dissipation.
The datasheet includes detailed pin descriptions, package ordering information, block diagrams, truth tables, and comprehensive DC and AC electrical characteristics such as voltage ranges, propagation delays, and minimum input swing requirements.
| Maximum count frequency | 1800‑2200 MHz |
|---|---|
| Propagation delay (CLK to Q0) | 1300‑2150 ps (typical 1700 ps) |
| Minimum input swing for CLK (AC guarantee) | 0.25 V |
The device can operate up to 1800 MHz at low temperature and up to 2200 MHz at typical temperature.