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Teilenummer | DM74S299 |
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Beschreibung | 3-STATE 8-Bit Universal Shift/Storage Register | |
Hersteller | Fairchild Semiconductor | |
Logo | ||
Gesamt 5 Seiten August 1986
Revised May 2000
DM74S299
3-STATE 8-Bit Universal Shift/Storage Register
General Description
This Schottky TTL eight-bit universal register features mul-
tiplexed inputs/outputs to achieve full eight bit data han-
dling 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 per-
mits 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 Left
Shift Right
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 Package Number
Package Description
DM74S299N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
© 2000 Fairchild Semiconductor Corporation DS006485
www.fairchildsemi.com
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Seiten | Gesamt 5 Seiten | |
PDF Download | [ DM74S299 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
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