
3141
THRU
3144
SENSITIVE
HALL-EFFECT SWITCHES
FOR HIGH-TEMP. OPERATION
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 1993, 2002 Allegro MicroSystems, Inc.
FUNCTIONAL BLOCK DIAGRAM
V
CC
X
REG.
Dwg. FH-005-2
GROUND
OUTPUT
3
2
1
MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.
NOTES: Typical values are at T
A
= +25
°
C and V
CC
= 8 V.
B
OP
= operate point (output turns ON); B
RP
= release point (output turns OFF); B
hys
= hysteresis (B
OP
- B
RP
).
1 gauss (G) is exactly equal to 0.1 millitesla (mT).
*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT or -UA).
ELECTRICAL CHARACTERISTICS at V
CC
= 8 V over operating temperature range.
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Supply Voltage
V
CC
Operating
4.5
—
24
V
Output Saturation Voltage
V
OUT(SAT)
I
OUT
= 20 mA, B > B
OP
—
175
400
mV
Output Leakage Current
I
OFF
V
OUT
= 24 V, B < B
RP
—
<1.0
10
μ
A
Supply Current
I
CC
B < B
RP
(Output OFF)
—
4.4
9.0
mA
Output Rise Time
t
r
R
L
= 820
, C
L
= 20 pF
—
0.04
2.0
μ
s
Output Fall Time
t
f
R
L
= 820
, C
L
= 20 pF
—
0.18
2.0
μ
s
Part Numbers*
A3141–
A3142–
A3143–
A3144–
Characteristic
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
B
OP
at T
A
= 25
°
C
50
100
160
130
180
230
220
280
340
70
—
350
over operating temp. range
30
100
175
115
180
245
205
280
355
35
—
450
B
RP
at T
A
= 25
°
C
10
45
130
75
125
175
165
225
285
50
—
330
over operating temp. range
10
45
145
60
125
190
150
225
300
25
—
430
B
hys
at T
A
= 25
°
C
20
55
80
30
55
80
30
55
80
20
55
—
over operating temp. range
20
55
80
30
55
80
30
55
80
20
55
—