A4984 Datasheet, PDF (21/21 Pages) Allegro MicroSystems – DMOS Microstepping Driver with Translator and Overcurrent Protection

A4984
DMOS Microstepping Driver with Translator
and Overcurrent Protection
LP Package, 24-Pin TSSOP with Exposed Thermal Pad
7.80 ±0.10
24
A
12
24X
0.10 C
0.25
+0.05
–0.06
B
4.32
0.65
3.00 4.40 ±0.10 6.40 ±0.20
4° ±4
0.15
+0.05
–0.06
0.60 ±0.15
(1.00)
0.65
0.45
3.00
6.10
C
SEATING
PLANE
0.25
SEATING PLANE
GAUGE PLANE
1.65
4.32
C PCB Layout Reference View
1.20 MAX
0.15 MAX
For Reference Only; not for tooling use
(reference JEDEC MO-153 ADT)
Dimensions in millimeters
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
B Exposed thermal pad (bottom surface)
C Reference land pattern layout (reference IPC7351
TSOP65P640X120-25M); all pads a minimum of 0.20 mm from all
adjacent pads; adjust as necessary to meet application process
requirements and PCB layout tolerances; when mounting on a multilayer
PCB, thermal vias at the exposed thermal pad land can improve thermal
dissipation (reference EIA/JEDEC Standard JESD51-5)
Copyright ©2008-2010, 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 departures from the detail specifications as may be required to per-
mit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
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failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
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nor for any infringement of patents or other rights of third parties which may result from its use.
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Allegro MicroSystems, Inc.
21
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
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