3-STATE 8-Bit Universal Shift/Storage Register
DM74S299 3-STATE 8-Bit Universal Shift/Storage Register
August 1986 Revised May 2000
DM74S299 3-STATE 8-Bit Universal ...
Description
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
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