A4983 Datasheet, PDF (16/16 Pages) Allegro MicroSystems – DMOS Microstepping Driver with Translator

A4983
DMOS Microstepping Driver with Translator
ET Package, 28-Pin QFN with Exposed Thermal Pad
5.15 .203
4.85 .191
All dimensions reference, not for tooling use
(reference JEDEC MO-220VHHD except contact length and exposed pad length and width)
Dimensions in millimeters
U.S. Customary dimensions (in.) 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
A _{Terminal #1 mark area}
B _{Exposed thermal pad (terminal #1 identifier appearance}
at supplier discretion)
C _{Reference land pattern layout (reference IPC7351}
QFN50P500X500X100-29V3M) except heel extended; 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)
28
1
2
A
28X
0.08 [.003] C
28X ^{0.30 .012}
0.18 .007
0.30 .012
NOM
28
24X0.20 .008
MIN
0.50 .020
NOM
4X0.20 .008
MIN
0.10 [.004] M C A B
0.05 [.002] M C _{0.50 .020}
4X0.20 .008
MIN
1
2
C
3.15 .124
NOM
4.96 .195
NOM
0.56 .022
REF
R0.25 .010 ₂
B
REF
1
1.09 .043
REF
3.15 .124
NOM
4.96 .195
NOM
28
3.15 .124
NOM
5.0 .197
NOM
A
B
5.15 .203
4.85 .191
C
SEATING
PLANE
1.00 .039
0.80 .031
0.20 .008
REF
0.05 .002
0.00 .000
3.15 .124
NOM
5.0 .197
NOM
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.
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 information included herein is be-
lieved to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or
other rights of third parties which may result from its use.
Copyright ©2007, Allegro MicroSystems, Inc.
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Allegro MicroSystems, Inc.
16
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
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