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SN54ALS299 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. SN54ALS299
Description  8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54ALS299 Datasheet(HTML) 2 Page - Texas Instruments

   
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SN54ALS299, SN74ALS299
8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS
WITH 3-STATE OUTPUTS
SDAS220B – DECEMBER 1982 – REVISED DECEMBER 1994
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
MODE
INPUTS
I/O PORTS
OUTPUTS
MODE
CLR
S1
S0
OE1†
OE2†
CLK
SL
SR
A/QA B/QB C/QC D/QD E/QE
F/QF G/QG H/QH
QA
QH
Clear
L
L
L
X
L
H
L
X
H
L
L
X
L
L
X
X
X
X
X
X
X
X
X
X
L
L
X
L
L
X
L
L
X
L
L
X
L
L
X
L
L
X
L
L
X
L
L
X
L
L
L
L
L
L
Hold
H
H
L
X
L
X
L
L
L
L
X
L
X
X
X
X
QA0
QA0
QB0
QB0
QC0
QC0
QD0
QD0
QE0
QE0
QF0
QF0
QG0
QG0
QH0
QH0
QA0
QA0
QH0
QH0
Shift
Right
H
H
L
L
H
H
L
L
L
L
X
X
H
L
H
L
QAn
QAn
QBn
QBn
QCn
QCn
QDn
QDn
QEn
QEn
QFn
QFn
QGn
QGn
H
L
QGn
QGn
Shift
Left
H
H
H
H
L
L
L
L
L
L
H
L
X
X
QBn
QBn
QCn
QCn
QDn
QDn
QEn
QEn
QFn
QFn
QGn
QGn
QHn
QHn
H
L
QBn
QBn
H
L
Load
H
H
H
X
X
X
X
a
b
c
d
e
f
g
h
a
h
NOTE: a ...h = the level of the steady-state input at inputs A through H, respectively. This data is loaded into the flip-flops while the flip-flop outputs
are isolated from the I/O terminals.
† When one or both output-enable inputs are high, the eight I/O terminals are disabled to the high-impedance state; however, sequential operation
or clearing of the register is not affected.
logic symbol
SRG8
M
0
3
R
9
6
14
5
15
4
8
2
3
0
1
S0
1
19
S1
12
CLK
5, 13
1,4D
11
SR
3,4D
7
6, 13
3,4D
13
17
12, 13
2,4D
18
SL
3,4D
16
&
3EN13
C4/1
→/2←
QA
QH
CLR
OE1
OE2
A/QA
H/QH
B/QB
C/QC
D/QD
E/QE
F/QF
G/QG
Z5
Z6
Z12
‡ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.


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