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SNJ54ALS/299FK |SNJ54ALS299FKTIN/a89avai8-Bit Universal Shift/Storage Registers With 3-State Outputs
SNJ54ALS299FKTIN/a139avai8-Bit Universal Shift/Storage Registers With 3-State Outputs
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83021012ATIN/a139avai8-Bit Universal Shift/Storage Registers With 3-State Outputs


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83021012A-SNJ54ALS/299FK-SNJ54ALS299FK-SNJ54ALS299J
8-Bit Universal Shift/Storage Registers With 3-State Outputs
– Shift Left
– Load Data
Operate With Outputs Enabled or at High
Impedance
3-State Outputs Drive Bus Lines Directly Can Be Cascaded for n-Bit Word Lengths Direct Overriding Clear Applications:
– Stacked or Push-Down Registers
– Buffer Storage
– Accumulator Registers
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs

description

These 8-bit universal shift/storage registers
feature multiplexed I/O ports to achieve full 8-bit
data handling in a single 20-pin package. Two
function-select (S0, S1) inputs and two output-
enable (OE1, OE2) inputs can be used to choose
the modes of operation listed in the function table.
Synchronous parallel loading is accomplished by taking both S0 and S1 high. This places the 3-state outputs
in the high-impedance state and permits data applied on the I/O ports to be clocked into the register. Reading
out of the register can be accomplished while the outputs are enabled in any mode. Clearing occurs
asynchronously when the clear (CLR) input is low. Taking either OE1 or OE2 high disables the outputs, but has
no effect on clearing, shifting, or storing data.
The SN54ALS299 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74ALS299 is characterized for operation from 0°C to 70°C.
OE2
G/QG
E/QE
C/QC
A/QA
QA′
CLR
GND
QH′
H/QH
F/QF
D/QD
B/QB
CLK
QH′
H/QH
F/QF
D/QD
G/QG
E/QE
C/QC
A/QA
QA′
OE2OE1S0
CLK
B/Q
CLR
GND
SN54ALS299... FK PACKAGE
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