Datasheet A6275 (Allegro) - 10

Serial-Input Constant-Current Latched LED Driver A6275 with Open LED Detection and Dot Correction Pin-out Diagrams Package A Package LW
LOGIC LOGIC GROUND
1
V
16
GROUND
1
V
16
DD DD SUPPLY SUPPLY SERIAL I SERIAL I
2
O
15
R EXT
2
O
15
R DATA IN REGULATOR DATA IN EXT REGULATOR SERIAL SERIAL CLOCK
3
CK
14
CLOCK
3
CK
14
DATA OUT DATA OUT LATCH OUTPUT LATCH
4
L OE
13 4
L OE
13
OUTPUT ENABLE ENABLE ENABLE ENABLE REGISTER REGISTER OUT 0
5
LATCHES
12
OUT OUT 7 0
5
LATCHES
12
OUT 7 OUT
6 11
OUT 6 OUT
6 11
1 1 OUT 6 OUT 2
7 10
OUT OUT 5 2
7 10
OUT 5 OUT
8 9
OUT OUT
8 9
OUT 3 4 3 4
TERMINAL DESCRIPTION Terminal No. Terminal Name Function
1 GND Reference terminal for control logic. 2 SERIAL DATA IN Serial-data input to the shift-register. 3 CLOCK Clock input terminal for data shift on rising edge. 4 LATCH ENABLE Data strobe input terminal; serial data is latched with high-level input. 5-12 OUT0-7 The eight current-sinking output ter mi nals. 13 OUTPUT ENABLE When (active) low, the output drivers are enabled; when high, all output driv- ers are turned OFF (blanked). 14 SERIAL DATA OUT CMOS serial-data output to the following shift-register. 15 REXT An external resistor at this terminal establishes the output current for all sink drivers. 16 SUPPLY (VDD) The logic supply voltage (typically 5 V). Allegro MicroSystems, Inc. 9 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com