TC74HC164AP/AF TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC164AP, TC74HC164AF 8-Bit Shift Register (S-IN, P-OUT) The TC74HC164A is a high speed CMOS 8-BIT SERIAL-IN TC74HC164AP PARALLEL-OUT SHIFT REGISTER fabricated with silicon gate 2 C MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. It consists of a serial-in, parallel-out 8-bit shift register with a CK input and an overriding CLR input. Two serial data inputs (A, B) are provided so that one may be used as a data enable. All inputs are equipped with protection circuits against static discharge or transient excess voltage. TC74HC164AF Features High speed: f = 58 MHz (typ.) at V = 5 V max CC Low power dissipation: I = 4 A (max) at Ta = 25C CC High noise immunity: V = V = 28% V (min) NIH NIL CC Outputs drive capability: 10 LSTTL loads Symmetrical output impedance: I = I = 4 mA (min) OH OL Balanced propagation delays: t t pLH pHL Weight Wide operating voltage range: V (opr) = 2 to 6 V CC DIP14-P-300-2.54 : 0.96 g (typ.) Pin and function compatible with 74LS164 SOP14-P-300-1.27A : 0.18 g (typ.) Pin Assignment Start of commercial production 1986-11 1 2014-03-01 TC74HC164AP/AF IEC Logic Symbol Truth Table Inputs Outputs Serial IN CLR CK QA QB QH A B L X X X L L L H X X No Change H L X L QA QG n n H X L L QA QG n n H H H H QA QG n n X: Dont care QA ~QG : The level of QA~QG, respectively, before the most recent positive edge of clock. n n System Diagram 2 2014-03-01