TC74HC597AF(F)

TC74HC597AP/AF TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC597AP, TC74HC597AF 8-Bit Latch/Shift Register The TC74HC597A is a high speed CMOS 8-BIT TC74HC597AP PARALLEL-IN/SERIAL-IN SERIAL-OUT LATCH/SHIFT 2 REGISTER fabricated with silicon gate C MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. It consists of an 8-bit data register feeding an 8-bit shift register. The parallel data on the A to H inputs is stored in the input register on the positive going transition of RCK. When the SLOAD input is held low, the input register data is passed into the shift registers. When SLOAD input is held high, the serial data input (SI) is enabled and the eight flip-flops TC74HC597AF perform serial shifting on the positive transition of SCK. A direct clear input ( SCLR ) sets the 8-bit shift register to zero. All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features High speed: f = 60 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 NIH NIL CC Weight DIP16-P-300-2.54A : 1.00 g (typ.) Output drive capability: 10 LSTTL loads SOP16-P-300-1.27A : 0.18 g (typ.) Symmetrical output impedance: I = I = 4 mA (min) OH OL Balanced propagation delays: t t pLH pHL Wide operating voltage range: V (opr) = 2 to 6 V CC Pin and function compatible with 74LS597 Pin Assignment Start of commercial production 1987-11 1 2014-03-01 TC74HC597AP/AF IEC Logic Symbol Truth Table Inputs Function SI SCK SCLR SLOAD RCK X X L H X S.R. is cleared to L X X H L X Input register data is stored into S.R. First stage of S.R. become L. Other stages store the data of previous stage, L H H X respectively. First stage of S.R. become H. Other stages store the data of previous stage, H H H X respectively. X H H X State of S.R. is not changed. X X X X Input data on A to H line is stored into input register. X X X X Storage register stage is not changed. X: Dont care 2 2014-03-01