74F299 Ver la hoja de datos (PDF) - Philips Electronics
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74F299 Datasheet PDF : 14 Pages
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Philips Semiconductors
8-bit universal shift/storage register (3-State)
Product specification
74F299
LOGIC SYMBOL
11
18
1
S0
19
S1
12
CP
9
MR
2
OE0
3
OE1
DS0
DS7
Q0 I/00 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 Q7
8 7 13 6 14 5 15 4 16 17
VCC = Pin 20
GND = Pin 10
SF00866
FUNCTION TABLE
INPUTS
OEn
MR
L
L
L
H
L
H
L
H
L
H
H
X
H = High voltage level
L = Low voltage level
X = Don’t care
↑ = Low-to-High clock transition
INPUTS
S1
S0
X
X
H
H
L
H
H
L
L
L
X
X
LOGIC SYMBOL (IEEE/IEC)
SRG8
9
4R
2
&
3
3EN13
1
19
0
1
M
0
3
12
C4/1→ /2←
11
1, 4D
8
7
3, 4D
5, 13
Z5
13
3, 4D
6, 13
Z6
6
14
5
15
4
16
3, 4D
12, 13
Z12
18
2, 4D
17
SF00890
OPERATING MODE
CP
X
Asynchronous Reset; Q0 - Q7 = Low
↑
Parallel load; I/On → Qn (I/On outputs disabled)
↑
Shift right; DS0 → Q0, Q0 → Q1, etc.
↑
Shift left; DS7 → Q7, Q7 → Q6, etc.
X
Hold
X
Outputs in High Z
1990 Mar 01
3
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