A3250LLT Datasheet, PDF (3/16 Pages) Allegro MicroSystems – Field-Programmable, Chopper-Stabilized Unipolar Hall-Effect Switches

A3250 and
A3251
Field-Programmable, Chopper-Stabilized,
Unipolar Hall-Effect Switches
Description (continued)
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).
Selection Guide
Part Number
Packing¹
A3250LLTTR-T
7-in. reel, 1000 pieces/reel
1_{Contact Allegro for additional packing options.}
2_{In south polarity magnetic field of sufficient strength.}
Package
Surface mount
T_A
(ºC)
–40 to 150
V_OUT
Power-On Running²
High
Low
Absolute Maximum Ratings
Characteristic
Supply Voltage
Reverse Supply Voltage
Zener Overvoltage
Output Current
Magnetic Flux Density
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
V_CC
V_RCC
V_Z
I_OUT
B
T_A
T_J(max)
T_stg
Range E
Range L
Notes
Rating
26.5
–18
30
20
Unlimited
–40 to 85
–40 to 150
165
–65 to 170
Units
V
V
V
mA
G
ºC
ºC
ºC
ºC
Pin-out Diagrams
1
2
3
1
2
3
LT
Terminal List
Number
Name
1
VCC
2
GND
3
VOUT
Function
Connects power supply to chip
Ground
Device output
UA
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com