Active High/Low Complementary Output Hall-effect Latch
Features
-
Digital dual complementary sink/source outputs
-
Reverse Voltage Polarity protection for full supply
range.
-
High output current capability
-
Low profile 4 pin SIP package
General Description
The AH342 is a bipolar latching hall IC with a pair of
complementary push/pull outputs. A dual hall
element is used to offset stress induced noise and
drift. The robust outputs are capable of sourcing up
to 7.4mA and sinking up to 4.4mA. The device
contains inherent reverse polarity protection up to
the full power supply range.
Applications
-
-
-
-
-
Conveyors
Motor control
Power sensing
Linear or rotary motion detection
RPM sensing
Pin Assignment
Front View
1 : Vcc
2 : DO
3 : DOB
1 2
3
4
4 : Vss
Pin Descriptions
Name
Vcc
DO
DOB
Vss
P/I/O
P
O
O
P
Pin #
1
2
3
4
Description
Positive
Supply
Output Pin
Output Pin
Ground
Power
342
Ordering Information
AH342 X - X X
Wafer Body
Blank
Package
P: SIP-4L
Lead
L : Lead Free
*Packing: Bulk
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.1 Sep 30, 2005
1/5
AH342
Active High/Low Complementary Output Hall-effect Latch
Block Diagram
OUTPUT AMP
7.5V
660
SOURCE
I
O
510
SINK
Voltage
Regulator
Output
Amp
#1
Interface
Circuit
Output
Amp
#2
IO
2
IO
1
Hall
Sensor
Amp
and
Trigger
Absolute Maximum Ratings
(Note 1)
Characteristics
Supply voltage
Voltage Externally Applied to Output
Output Current
Magnetic Flux density
Operation Temperature
Storage Temperature
Sym.
V
CC
V
OUT
Ic
B
T
OPR
T
STG
o
Conditions
-40 C to 125 C
o
o
-40 C to 125 C
No limit; the circuit
cannot be damaged by
magnetic overdrive
No power applied
o
Values
±28
-1.2 to 5
±10
Unlimited
-40 to 125
-40 to 150
Unit
V
V
mA
°C
°C
Note 1:
Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. However, the
electrical and magnetic characteristics are not guaranteed as the maximum limits (above recommended operating conditions)
are approached nor will the device necessarily operate at absolute maximum rating.
Anachip Corp.
www.anachip.com.tw
2/5
Rev.1.1 Sep 30, 2005
AH342
Active High/Low Complementary Output Hall-effect Latch
Electrical Characteristics
(Note 2, 3)
Characteristic Sym.
Supply Voltage
V
CC
Supply Current
I
CC
Output Voltage
#1 Sourcing
#2 Sinking
V
OUT
#1 Sinking
#2 Sourcing
Leakage (sink) I
Leak(sink)
Output Current
#1 Sourcing
#2 Sinking
I
OUT
#1 Sinking
#2 Sourcing
Output Switching Time
Fall Time
Rise Time
tf
tr
90% to 10%; no load 28V±0.5%
Supply
10% to 90%; no load 28V±0.5%
Supply
-
-
-
-
-
-
-
-
-
-
1.0
µs
1.0
Apply 2V to output and measure
current.
Switch
magnetically
operated, no load 28V±0.5%.
Apply 2V to output and measure
current.
Switch
magnetically
released, no load 28V±0.5%.
5.5
2.8
2.8
5.5
7.4
3.4
3.4
7.4
8.0
4.7
4.7
8.0
5.0
2.4
2.4
5.0
7.4
3.4
3.4
7.4
8.5
5.0
mA
5.0
8.5
Conditions
28V±0.5% supply
Switch magnetically operated:
No load 28V±0.5% supply.
Switch magnetically released:
No load 28V±0.5% supply.
Apply voltage 0.2V greater than
measured output source voltage
measure
current,
no
load
28V±0.5% supply.
24
o
C ± 2
o
C
Min
Typ. Max
4.5
4
6.0
0
0
6.0
-
-
4.5
7.0
0.1
0.1
7.0
-
28
6
7.5
0.2
0.2
7.5
1.0
-40
o
C to 125
o
C
Units
Min
Typ. Max
4.5
3
-
-
-
-
-
-
4.5
-
-
-
-
-
28
7
-
-
-
-
1.0
V
mA
V
µA
Magnetic Characteristics
( Ta=+25°C)
(Note 2, 3)
Characteristic
Operate Point
Release Point
Hysteresis
Sym.
Bop
Brp
Bhy
24 C ± 2 C
Vs=12Vdc ± 0.5%Vdc
Min.
Max.
40
120
-120
-40
120
200
o
o
o
(1mT = 10 Gauss)
-40 C to 125 C
Vs=4.5Vdc to 28Vdc
Unit
Min.
Max.
30
150
Gauss
-150
-30
Gauss
120
200
Gauss
o
o
o
o
Note 2:
All the parameters are tested under the 25 C only. The operation temperature (-40 C to 125 C) is guaranteed by design, it is
typical value.
Note 3:
The magnetic field strength (gauss) required to cause the switch to change state (operate and release) will be as specified in
the magnetic characteristics. To test the switch against the specified magnetic characteristics the switch must be placed in a
uniform magnetic field.
Anachip Corp.
www.anachip.com.tw
3/5
Rev.1.1 Sep 30, 2005
AH342
Active High/Low Complementary Output Hall-effect Latch
DO
( Output Voltage )
( Output Voltage )
DOB
V
cc
( off-state )
( off-state )
V
cc
Turn off
B
hy
Turn on
Turn on
B
hy
Turn oFF
( on-state )
( on-state )
V
sat
V
sat
S
N
B
rp
0
B
op
S
( Magnetic flux density B )
N
B
rp
0
B
op
( Magnetic flux density B )
Performance Characteristics (SIP4)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
P d (m W )
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
25
550
105
198
50
440
110
176
60
396
115
154
70
352
120
132
80
308
125
110
85
286
130
88
90
264
135
66
95
242
140
44
100
220
150
0
P o w e r D is s ip a tio n C u rve
Note：SIP-4L package.
Operating Characteristics
DO
( Output Voltage )
S
Marking side
V
cc
High
V
d
B
hy
Low
N
( SIP4 )
N
V
sat
B
rp
0
B
op
S
( Magnetic flux density )
Anachip Corp.
www.anachip.com.tw
4/5
Rev.1.1 Sep 30, 2005
AH342
Active High/Low Complementary Output Hall-effect Latch
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