A6277SLW Allegro Microsystems Inc, A6277SLW Datasheet - Page 9

• Manufacturer Part Number: A6277SLW
• Description: IC LED DRIVER LINEAR 20-SOIC
• Manufacturer: Allegro Microsystems Inc
• Type: Linear (Non-Switching)r

Specifications of A6277SLW

• Constant Current: Yes
• Topology: 8-Bit Shift Register
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: General Purpose
• Frequency: 20MHz
• Voltage - Supply: 4.5 V ~ 5.5 V
• Voltage - Output: 1V
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Operating Temperature: -20°C ~ 85°C
• Current - Output / Channel: 120mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Efficiency: -

A6277
Serial
D
Input Input
L = Low Logic (Voltage) Level
a
H
L
X
a t
C
o l
c
OUTPUT ENABLE (active low)
C
k
L
O
I
H
L
R
X
P
1
IN
IN
Shift Register Contents
1
1
C
K
I
R
R
R
X
P
2
2
1
1
2
a
n
I
R
R
R
X
P
3
d
3
2
2
3
S
... I
... R
... R
... R
... X
... P
E
R
N-1
H = High Logic (Voltage) Level
N-1
N-2
N-2
N-1
A I
8-Bit Serial Input Constant-Current Latched LED Driver
L
I
R
R
R
X
P
Dwg. EP-010-13
N
Dwg. EP-010-11
D
N
N-1
N-1
N
A
V DD
V DD
T
Output
A
Serial
D
R
R
R
X
P
a
N-1
N-1
N I
N
N
a t
E
Latch
Input
n
TRUTH TABLE
a
H
L
b
e l
I
R
P
X
1
1
1
X = Irrelevant
Latch Contents
I
R
P
X
2
2
2
I
R
P
X
3
3
3
...
...
...
...
LATCH ENABLE and HIGH/LOW
IN
I
R
P
X
P = Present State
N-1
N-1
N-1
S
P
R
I
X
N
N
E
N
R
A I
Output
E
Dwg. EP-063-6
Input
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
n
L
a
H
L
b
D
e l
A
T
R = Previous State
I
P
H H H ... H
A
Dwg. EP-010-12
1
1
O
Output Contents
I
P
V DD
V DD
2
U
2
T
I
P
3
3
OUT
... I
... P
N-1
N-1
I
H
P
N
N
8