器件名称:
DM74LS962
功能描述:
Dual Rank 8-Bit TRI-STATE Shift Register
文件大小:
157.98KB 共8页
简 介:
DM74LS962 (DM86LS62) Dual Rank 8-Bit TRI-STATE Shift Register August 1991 DM74LS962 (DM86LS62) Dual Rank 8-Bit TRI-STATE Shift Register General Description These circuits are TRI-STATE edge-triggered 8-bit I O registers in parallel with 8-bit serial shift registers which are capable of operating in any of the following modes parallel load from I O pins to register ‘‘A’’ parallel transfer down from register ‘‘A’’ to serial shift register ‘‘B’’ parallel transfer up from shift register ‘‘B’’ to register ‘‘A’’ serial shift of register ‘‘B’’ or exchange data between register ‘‘A’’ and shift register ‘‘B’’ Since the registers are edge-triggered by the positive transition of the clock the control lines which determine the mode or operation are completely independent of the logic level applied to the clock Designed for bus-oriented systems these circuits have their TRI-STATE inputs and outputs on the same pins Features Y Y Y Y Y Y Y Y Y Registers are edge-triggered by the positive transition of the clock All inputs are PNP transistors Input disable dominates over output disable Output high impedance state does not impede any other mode of operation 8-bit I O pins are TRI-STATE buffers Typical shift frequency is 36 MHz Typical power dissipation is 305 mW All control inputs are active when in an ‘‘L’’ logic state Devices can be cascaded into N-bit word Connection Diagram Dual-In-Line Package Pin Description DISO Output disable IS Serial input DISI Input disable DISTU Transfer up ……
