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1999 Jun 30
3
Philips Semiconductors
Product specication
8-stage shift-and-store register LED driver
HEF4794B
handbook, full pagewidth
MBD911
EO
STR
CP
D
O0
O1 O2 O3 O4 O5 O6
O7
O '
S
OS
HEF4794B
STAGE 0
DO
CP
FF
1
DO
CP
latch
1
STAGE 1 to 6
STAGE 7
DO
CP
DO
CP
latch
8
DO
DQ
CP
latch
FF
8
Fig.3 Logic diagram.
PINNING
SYMBOL
PIN
DESCRIPTION
STR
1
strobe input
D
2
data input
CP
3
clock input
O0 to O3
4 to 7
parallel outputs 0 to 3
(open drain)
VSS
8
ground
OS,OS'
9 and 10
serial outputs
O7
11
parallel output 7 (open drain)
O6
12
parallel output 6 (open drain)
O5
13
parallel output 5 (open drain)
O4
14
parallel output 4 (open drain)
EO
15
output enable input
VDD
16
supply voltage
Fig.4 Pin configuration.
handbook, halfpage
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
STR
D
CP
O0
O1
O2
O3
VSS
VDD
EO
O4
O5
O6
O7
O '
S
O S
HEF4794B
MBD910
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