Field-Programmable, Chopper-Stabilized,
Unipolar Hall-Effect Switches
A3250 and
A3251
2
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Selection Guide
Part Number
Packing
1
Package
T
A
(篊)
V
OUT
Power-On Running
2
A3250LLTTR-T
7-in. reel, 1000 pieces/reel
Surface mount
40 to 150 High
Low
1
Contact Allegro for additional packing options.
2
In south polarity magnetic field of sufficient strength.
The other differences in the devices are the power-on state. The
A3250 powers-on in the HIGH state, while the A3251 powers-on
in the LOW state.
Three package styles provide a magnetically optimized package
for most applications. Type LT is a miniature SOT89/TO-243AA
surface mount package that is thermally enhanced with an
exposed ground tab, and type UA is a three-lead ultramini SIP
for through-hole mounting. The packages are lead (Pb) free, with
100% matte tin plated leadframes (suffix, T).
Description (continued)
Absolute Maximum Ratings
Characteristic
Symbol
Notes
Rating Units
Supply Voltage
V
CC
26.5
V
Reverse Supply Voltage
V
RCC
18
V
Zener Overvoltage
V
Z
30
V
Output Current
I
OUT
20
mA
Magnetic Flux Density
B
Unlimited
G
Operating Ambient Temperature
T
A
Range E
40 to 85
篊
Range L
40 to 150 篊
Maximum Junction Temperature
T
J
(max)
165
篊
Storage Temperature
T
stg
65 to 170 篊
2 3
1
Pin-out Diagrams
2
1
3
UA
LT
Terminal List
Number Name
Function
1
VCC Connects power supply to chip
2
GND Ground
3
VOUT Device output
发布紧急采购，3分钟左右您将得到回复。
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