A3955 Allegro MicroSystems, Inc., A3955 Datasheet - Page 13

• Manufacturer Part Number: A3955
• Description: Full-Bridge PWM Microstepping Motor Driver
• Manufacturer: Allegro MicroSystems, Inc.

A3955
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.
failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
nor for any in fringe ment of patents or other rights of third parties which may result from its use.
Copyright ©1997-2007, Allegro MicroSystems, Inc.
The products described here are manufactured under one or more U.S. patents, including U. S. Patent No. 5,684,427, 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-
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
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;
16X
0.10
C
0.41
16
1
.005 [1.27]
A
2
A
10.30
16
1
1.27
2
Full-Bridge PWM Microstepping Motor Driver
.060 [1.52]
.018 [0.46]
.750 [19.05]
For the latest version of this document, visit our website:
7.50
.100 [2.54]
0.20
LB package 16-pin SOICW
10.30
SEATING
PLANE
2.65 MAX
B package 16-pin DIP
www.allegromicro.com
.250 [6.35]
.210 [5.33] MAX
.130 [3.30]
C
A Terminal #1 mark area
All dimensions nominal, not for tooling use
(reference JEDEC MS-001 BB)
Dimensions in inches, metric dimensions (mm) in brackets, for reference only
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
.430 [10.92]
GAUGE PLANE
0.25
4º
SEATING PLANE
0.84
0.27
0.65
2.25
A Terminal #1 mark area
B
All dimensions nominal, not for tooling use
Dimensions in millimeters
(reference JEDEC MS-013 AA)
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
Pins 4 and 13 fused internally
Reference pad layout (reference IPC SOIC127P1030X265-16M)
All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary
to meet application process requirements and PCB layout tolerances
B
.300 [7.62]
PCB Layout Reference View
.010 [0.25]
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
1.27
9.50
13