器件名称:
DM74S299N
功能描述:
3-STATE 8-Bit Universal Shift/Storage Register
文件大小:
58.63KB 共5页
简 介:
DM74S299 3-STATE 8-Bit Universal Shift/Storage Register August 1986 Revised May 2000 DM74S299 3-STATE 8-Bit Universal Shift/Storage Register General Description This Schottky TTL eight-bit universal register features multiplexed inputs/outputs to achieve full eight bit data handling in a single 20-pin package. Two function-select inputs and two output-control inputs can be used to choose the modes of operation listed in the function table. Synchronous parallel loading is accomplished by taking both function-select lines, S0 and S1, HIGH. This places the 3-STATE outputs in a high-impedance state, which permits data that is applied on the input/output lines to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. A direct overriding input is provided to clear the register whether the outputs are ENABLED or OFF. Features s Multiplexed inputs/outputs provide improved bit density s Four modes of operation: Hold (Store) Shift Right Shift Left Load Data s 3-STATE outputs drive bus lines directly s Can be cascaded for N-bit word lengths s Operates with outputs enabled or at high Z s Guaranteed shift (clock) frequency 50 MHz s Typical power dissipation 700 mW Ordering Code: Order Number DM74S299N Package Number N20A Package Description 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Connection Diagram 2000 Fairchild Semiconductor Corporation DS006485 www.fairchildsemi.com DM74S299 Fun……
