Catalog > Semiconductors > Integrated Circuits 7491 Shift Register 8-Bit Shift Register, Serial In, Serial Out, Gated Input Part No: 7491 20.64 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Functional 8-stage serial shift register Serial data input Serial output from last stage Clocked data shifting Master reset clears all stages Can be cascaded for longer registers Pin description (16-pin) Serial data input Clock input Reset (clear) Parallel outputs: Q0–Q7 Serial output: from final stage VCC: Pin 16 GND: Pin 8 Applications Data storage and transfer Serial-to-serial data shifting Digital systems and counters LED/logic sequencing Communication interfaces Specifications Supply voltage (VCC):75 V – 5.25 V (typical 5 V) Input logic high (VIH): ≥ 2.0 V Input logic low (VIL): ≤ 0.8 V Output logic high (VOH): ≥ 2.4 V Output logic low (VOL): ≤ 0.4 V Output current: High: −0.4 mA Low: 8 mA Power dissipation: ~50 mW typical Operating temperature: 0 °C to 70 °C Timing characteristics Maximum clock frequency: ~25 MHz (typical TTL) Propagation delay: ~15 ns – 35 ns Clock input: Positive-edge triggered Clear/reset: Asynchronous master reset