Texas Instruments CD74HCT40103 High Speed CMOS Logic 8-Stage Synchronous Down Counters CD74HCT40103EE4

The CD74HCT40103 is a high-speed CMOS logic 8-stage synchronous down counter designed for efficient counting applications. It operates within a supply voltage range of 4.5V to 5.5V and features a wide temperature range from -55¬8C to 125¬8C, making it suitable for various environments. The device includes control inputs for enabling or disabling the clock, clearing the counter, and presetting the counter either synchronously or asynchronously. In normal operation, the counter decrements by one count on each positive clock transition, with counting inhibited when the TE input is high. The TC output indicates when the count reaches zero, remaining low for one full clock period. The CD74HCT40103 can be cascaded for extended counting capabilities and is compatible with LSTTL logic levels, allowing it to drive up to 10 LSTTL loads. The device is noted for its low power consumption compared to traditional LSTTL logic ICs while maintaining comparable speeds.