C
SEATING
PLANE
5.33 MAX
0.46 ±0.12
6.35
+0.76
–0.25
26.16
+0.76
–1.27
3.30
+0.51
–0.38
10.92
+0.38
–0.25
1.52
+0.25
–0.38
7.62
2.54
0.38
+0.10
–0.05
21
20
A
For Reference Only
Dimensions in millimeters
(reference JEDEC MS-001 AD)
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A
Terminal #1 mark area
Package A,20-pin DIP
Package LW, 20-pin SOICW
21
20
21
20
A
2.65 MAX
C
SEATING
PLANE
C0.10
20X
A
Terminal #1 mark area
GAUGE PLANE
SEATING PLANE
B
2.25
0.65
9.50
1.27
PCB Layout Reference View
For Reference Only
Dimensions in millimeters
(Reference JEDEC MS-013 AC)
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
B
Reference pad layout (reference IPC SOIC127P1030X265-20M)
All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary
to meet application process requirements and PCB layout tolerances
1.27
0.25
0.20 ±0.10
0.41 ±0.10
12.80±0.20
10.30±0.33
7.50±0.10
4° ±4
0.27
+0.07
–0.06
0.84
+0.44
–0.43
Copyright ©2001-2009, Allegro MicroSystems, Inc.
The products described here are manufactured under one or more U.S. patents or U.S. patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec i fi ca tions as may be required to per-
mit improvements in the per for mance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
Allegro’s products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the
failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
The in for ma tion in clud ed herein is believed to be ac cu rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its use;
nor for any in fringe ment of patents or other rights of third parties which may result from its use.
For the latest version of this document, visit our website:
www.allegromicro.com
8-Bit Serial Input Constant-Current Latched LED Driver
A6277
11
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
