74F674
FEATURES
- 16-bit serial I/O shift register
- 16-bit parallel-in/serial-out converter
- Recirculating serial shifting
- mon serial data I/O pin (3-State)
DESCRIPTION
The 74F674 is a 16-bit shift register with serial and parallel load capability and serial output. A single pin serves alternately as an input for serial entry or as a 3-State serial output. In the serial out mode the data recirculates in the register. Chip Select, Read/Write and Mode inputs provide control flexibility. The 74F674 operates in one of four modes, as indicated in the Function table. Hold: A High signal on the Chip Select (CS) input prevents clocking and forces the Serial Input/Output (SI/O) 3-State buffer into the high impedance state. Serial load: Data present on the SI/O pin shifts into the register on the falling edge of CP. Data enters the Q0 position and shifts toward Q15 on successive clocks. Serial output: The SI/O 3-State buffer is active and the register contents are shifted out from Q15 and...
