M74HC166

M74HC166 8 BIT PISO SHIFT REGISTER s HIGH SPEED : fMAX = 63 MHz (TYP.) at VCC = 6V s LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C s HIGH NOISE IMMUNITY: VNIH = VNIL = 28 % VCC (MIN.) s SYMMETRICAL OUTPUT IMPEDANCE: DIP SOP TSSOP |IOH| = IOL = 4mA (MIN) s BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL )s WIDE OPERATING VOLTAGE RANGE: t(sVCC (OPR) = 2V to 6V s PIN AND FUNCTION COMPATIBLE WITH uc74 SERIES 166 rodDESCRIPTION PThe M74HC166 is an high speed CMOS 8 BIT PISO SHIFT REGISTER fabricated with silicon tegate C2MOS technology. leIt consists of parallel or serial inputs and a oserial-out 8 bit shift register with gated clock inputs sand an overriding clear input. The parallel-in or bserial-in modes are controlled by the SHIFT/ OLOAD input. When the SHIFT/LOAD input is held -high, the serial data input is enabled and the eight )flip-flops perform serial shifting with each clock t(spulse; when held low, the parallel data inputs are ORDER CODES PACKAGE TUBE DIP SOP TSSOP M74HC166B1R M74HC166M1R T&R M74HC166RM13TR M74HC166TTR enabled and synchronous loading occurs on the next clock pulse. Clocking is accomplished on the low-to-high level edge of the clock pulse. The CLOCK-INHIBIT input should be changed to the high only while the clock input is held high. A direct clear input overrides all other inputs, including the clock, and sets all flip-flops to zero. Functional details are shown in the truth table and the timing chart. All inputs are equipped with protec...