a6276elp-t Allegro MicroSystems, Inc., a6276elp-t Datasheet - Page 4

• Manufacturer Part Number: a6276elp-t
• Description: 16-bit Serial Input, Constant-current Latched Led Driver
• Manufacturer: Allegro MicroSystems, Inc.

A6276
Serial
Data
Input Input I
H
L
X
L = Low Logic (Voltage) Level H = High Logic (Voltage) Level X = Irrelevant P = Present State R = Previous State
Clock
OUTPUT ENABLE (active low)
CLOCK and SERIAL DATA IN
H
L
R
X
P
1
Shift Register Contents
1
1
IN
IN
I
R
R
R
X
P
2
2
1
1
2
I
R
R
R
X
P
3
3
2
2
3
...
...
...
...
...
...
I
R
R
R
X
P
N-1
N-1
N-2
N-2
N-1
I
R
R
R
X
P
N
Dwg. EP-010-13
N
N-1
N-1
N
Dwg. EP-010-11
V DD
Output
V
Serial
DD
Data
R
R
R
X
P
N-1
N-1
N
N
Enable
Latch
Input
TRUTH TABLE
16-Bit Serial Input, Constant-Current
H
L
I
R
P
X
1
1
1
Latch Contents
I
R
P
X
2
2
2
I
R
P
X
3
3
3
...
...
...
...
I
R
P
X
IN
N-1
N-1
N-1
P
R
I
X
Dwg. EP-063-6
N
SERIAL DATA OUT
N
N
LATCH ENABLE
Latched LED Driver
Output
Enable
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Input
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
H
L
V
I
P
H H H ... H
1
DD
1
Output Con tents
I
P
Dwg. EP-010-12
2
2
OUT
I
P
3
V DD
3
... I
... P
N-1
N-1
H
I
N
P
N
4