T54LS166

The T54LS166 is an 8-bit shift register. It consists of a parallel-in or serial-in, serial-out 8 bit shift register with gated clock inputs and an overriding clear input. The parallel-in or serial-in modes are controlled by the SHIFT/LOAD input. When the SHIFT/LOAD input is held high, the serial data input is enabled and the eight flip-flop perform serial shifting with each clock pulse. When held LOW, the parallel data inputs are enabled and synchronous loading occurs on the next clock pulse. Clocking is accomplished on the low-high level edge of the clock pulse via a two input positive NOR gate.

There are some features of T54LS166 as follows. First is direct overriding clear. The second is parallel conversion. The last one is synchronous load.

What comes next is about the absolute maximum ratings about T54LS166. The VCC (supply voltage) is from -0.5 to 7 V. The VI (input voltage, applied to input) is from -0.5 to 15 V. The VO (output voltage, applied to output) is from 0 to 10 V. The II (input current, into inputs) is from -30 to 5 mA. The IO (output current, into outputs) is 50 mA. Then is about the guranteed operating ranges. The minimum supply voltage is 4.5 V, the typical is 5.0 V and the maximum is 5.5 V and the temperature is from -55 to +125.