CD74HC4094

The CD74HC4094 from Texas Instruments is a high-speed CMOS logic integrated circuit functioning as an 8-stage shift and store bus register. It features a storage latch for each stage, enabling data to be strobed from a serial input to parallel buffered tri-state outputs. These parallel outputs can be directly connected to common bus lines.

This device supports a wide operating voltage range, with HC types operating from 2V to 6V and HCT types from 4.5V to 5.5V. It offers buffered inputs and separate serial outputs synchronized to clock edges for cascading. The operating temperature range is extensive, spanning from -55°C to 125°C.

Key electrical characteristics include a maximum output current of 5.2mA (IOL) and -5.2mA (IOH), a maximum supply current of 160µA, and a clock frequency of up to 24MHz. Propagation delay times range from 10ns to 50ns. The fanout capabilities are rated at 10 LSTTL loads for standard outputs and 15 LSTTL loads for bus driver outputs.

The CD74HC4094 is available in various packages including CDIP, SOIC, PDIP, SO, and TSSOP. Its design emphasizes balanced propagation delay and transition times, offering significant power reduction compared to LSTTL logic ICs. High noise immunity is also a characteristic, with NIL and NIH at 30% of VCC at 5V.