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MLX92251LSE-AxA
Dual Hall Effect Latch with Speed & Direction Detection
Features and Benefits
Operating Voltage from 2.7V to 24V
Two Integrated Hall plates for Direction
Detection
Latching Magnetic Characteristics
Speed & Direction Open-Drain Outputs
Direction Output updated prior Speed
Output
Excellent Temperature Stability
Reverse Supply Voltage Protection
Output Current Limitation and Auto-Shutoff
Under-Voltage Lockout Protection
Ordering information
Part No.
MLX92251LSE-AAA-000-RE
MLX92251LSE-ABA-000-RE
Temperature Code
L (-40°C to 150°C)
L (-40°C to 150°C)
Applications
Windows lifter with Anti-Pinch feature
Rotation speed & direction detection
Linear speed & direction detection
Angular position detection
Power closures with Anti-Pinch features
Sensitivity
± 7.5 mT
± 2.5 mT
Package Code
SE (TSOT-5L)
SE (TSOT-5L)
Packing Form
RE (Tape & Reel)
RE (Tape & Reel)
Legend:
Temperature Code:
Package Code:
Packing Form:
Ordering example:
L for Temperature Range -40°C to 150°C
SE for TSOT,
RE for Reel
MLX92251LSE-AAA-000-RE
1. Functional Diagram
Switched
Hall
Plate
CDS
Amplifier
Switched
Hall
Plate
CDS
Amplifier
VDD
Voltage Regulator
with Reverse Polarity
Protection
Open-Drain
Output
SP
Direction
Detection
Open-Drain
Output
DIR
Reference
Timing
Logic
GND
2. General Description
The Melexis MLX92251 is a second generation Hall-effect
dual latch designed in mixed signal CMOS technology. The
device integrates a voltage regulator, two Hall sensors with
advanced offset cancellation system and two open-drain
output drivers, all in a single package.
Two Hall plates are integrated on the same piece of silicon,
thus using the high precision of the wafer fabrication
process to ensure a fixed
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spacing of 1.45mm between the sensing elements. The
first Hall plate signal is used to provide the speed signal
output. The combination of both the first and second Hall
plate signals is then internally processed to directly deliver
a direction signal output.
The MLX92251 shares the MLX922xx-based platform,
synonym of high performance in terms of electrical
specification, magnetic specification and protection level.
With latching magnetic characteristics, the speed (SP)
output is turned low or high respectively with a sufficiently
strong South or North pole facing the package top side.
When removing the magnetic field, the device keeps its
previous state.
The direction (DIR) output is latched in Low or High state
depending on the movement direction of the applied
magnetic field, as a result of certain magnetic pulse
sequence on both Hall sensors.
The MLX92251 is delivered in a Green compliant 5-pin Thin
Small Outline Transistor (TSOT) for surface-mount process.
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MLX92251LSE-AxA
Dual Hall Effect Latch with Speed & Direction
Contents
1. Functional Diagram ................................................................................................................................ 1
2. General Description ............................................................................................................................... 1
3. Glossary of Terms................................................................................................................................... 3
4. Absolute Maximum Ratings.................................................................................................................... 3
5. General Electrical Specifications............................................................................................................. 4
6. Magnetic Specifications ......................................................................................................................... 5
6.1. MLX92251LSE-AAA-000 ..................................................................................................................... 5
6.2. MLX92251LSE-ABA-000...................................................................................................................... 5
7. Output Behaviour versus Magnetic Pole ................................................................................................ 6
8. Application Information ......................................................................................................................... 7
8.1. Default Application Schematic........................................................................................................... 7
8.2. Recommended Application Schematic for ISO7637-2 (pulses 5a and 5b)..................................... 7
8.3. Speed (SP) Output Behavior vs. BOP/BRP ......................................................................................... 7
8.4. Output Jitter, Speed Signal Delay and Direction Detection ............................................................. 8
8.5. UV lockout and POR behaviour.......................................................................................................... 8
9. Performance Graphs .............................................................................................................................. 9
9.1. Magnetic parameters vs. TA............................................................................................................... 9
9.2. Magnetic parameters vs. VDD............................................................................................................. 9
9.3. VDSON vs. TA .......................................................................................................................................... 9
9.4. VDSON vs. VDD ........................................................................................................................................ 9
9.5. IDD vs. TA............................................................................................................................................... 9
9.6. IDD vs. VDD ............................................................................................................................................ 9
9.7. ILEAK vs. TA .......................................................................................................................................... 10
9.8. ILEAK vs. VDD ........................................................................................................................................ 10
9.9. Power Derating vs. TA ....................................................................................................................... 10
10. Standard information regarding manufacturability of Melexis products with different soldering
processes ............................................................................................................................................ 11
11. ESD Precautions ................................................................................................................................. 11
12. SE Package Information...................................................................................................................... 12
12.1. Pin Definitions and Descriptions.................................................................................................... 12
13. Contact .............................................................................................................................................. 13
14. Disclaimer .......................................................................................................................................... 13
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MLX92251LSE-AxA
Dual Hall Effect Latch with Speed & Direction
3. Glossary of Terms
MilliTesla (mT), Gauss
RoHS
TSOT
ESD
Units of magnetic flux density: 1mT = 10 Gauss
Restriction of Hazardous Substances
Thin Small Outline Transistor (TSOT package) also referred with the Melexis package code
“SE”
Electro-Static Discharge
code SE
4. Absolute Maximum Ratings
Parameter
Supply Voltage
Supply Current
Reverse Supply Voltage
Reverse Supply Current
Output Voltage
Output Current
Reverse Output Voltage
Reverse Output Current
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
ESD Sensitivity HBM (1)
ESD Sensitivity CDM (2)
Magnetic Flux Density
Symbol
VDD
IDD
VDDREV
IDDREV
VOUT
IOUT
VOUTREV
IOUTREV
TA
TS
TJ
-
-
B
Table 1. Absolute maximum ratings
Value
+27
+20
-27
-20
+27
+20
-0.5
-50
-40 to +150
-55 to +165
+165
2500
1000
Unlimited
Units
V
mA
V
mA
V
mA
V
mA
C
C
C
V
V
mT
Exceeding the absolute maximum ratings may cause permanent damage.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
__________________
1 Human Body Model according AEC-Q100-002 standard.
2 Charged Device Model according AEC-Q100-011 standard.
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MLX92251LSE-AxA
Dual Hall Effect Latch with Speed & Direction
5. General Electrical Specifications
DC Operating Parameters TA = -40°C to 150°C, VDD = 2.7V to 24V (unless otherwise specified)
Parameter
Symbol Test Conditions
Min
Supply Voltage
Supply Current
Reverse Supply Current
Output Leakage Current
VDD
IDD
IDDREV
IOFF
Operating
VDD = 12V
VDD = -18V
VOUT = 12V, VDD = 12V, B < BRP
2.7
3
Output Saturation Voltage
Output Rise/Fall Time (2,3)
Output Current Limit
Output ON Time under Current
Limit conditions(5)
Output OFF Time under Current
Limit conditions(5)
Chopping Frequency
Speed Signal Delay (2,6)
VOUTS
tR / tF
ICL
tCLON
tCLOFF
fCHOP
tSPD
B > BOP, IOUT = 10mA
VDD = 12V, VPU (4) = 5V,
RPU = 1kΩ, CL = 50pF
B > BOP, VOUT = 12V
B > BOP, VPU = 12V, RPU = 100Ω
B > BOP, VPU = 12V, RPU = 100Ω
0.1
14
150
0.4
Output Refresh Period
Output Jitter (p-p value) (2)
Maximum Switching Frequency (2,7)
Power-On Time (8)
tPER
tJITTER
fSW
tPON
Over 1000 successive output
switching
events @1kHz square wave, BPEAK=
50mT, tRISE=tFALL ≤100μs
30mT square wave magnetic
field
VDD= 5V, dVDD/dt > 2V/µs
3.2
40
Under-voltage Lockout Threshold
Under-voltage Lockout Reaction time (2)
VUVL
tUVL
2.2
SE Package Thermal Resistance
RTH Single layer (1S) JEDEC board
Table 2: electrical specifications
Typ (1)
-
4.5
0.1
0.2
0.3
25
230
3.5
400
0.85
5
±2.6
66
16
2.4
1
300
Max Units
24 V
7 mA
1 mA
10 µA
0.5 V
1 µs
44 mA
µs
ms
kHz
1.6 µs
8.4 µs
µs
kHz
35 μs
2.7 V
µs
°C/W
1 Typical values are defined at TA = +25°C and VDD = 12V
2 Based on device characterization results, not subject to production test
3 Measured between 0.1*VPU and 0.9*VPU
4 RPU and VPU are respectively the external pull-up resistor and pull-up power supply
5 If the Output is in Current Limitation longer than tCLON the Output is switched off in high-impedance state. The Output returns back in
active state at next reaching of BOP or after tCLOFF time interval
6 Controlled delay between direction (DIR) signal update and speed (SP) signal update
7 Maximum switching frequency corresponds to the maximum frequency of the applied magnetic field which is detected without loss of
pulses
8 The Power-On Time represents the time from reaching VDD = 2.7V to the first refresh of the SP output
REVISION 004 JUNE 03, 2019
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MLX92251LSE-AxA
Dual Hall Effect Latch with Speed & Direction
6. Magnetic Specifications
6.1. MLX92251LSE-AAA-000
DC Operating Parameters VDD = 2.7V to 24V and TA =-40°C to 150°C (unless otherwise specified)
Parameter
Symbol Test Conditions
Min Typ Max
Operating Point
Release Point
Magnetic Matching
Magnetic Offset
Temperature Coefficient
Hall Plates Spacing
BOP
BRP
BMATCH
BOFF
TC
-
6.2. MLX92251LSE-ABA-000
BOP1 BOP2 or BRP1 BRP2, TA = 25°C
BOP1 BOP2 or BRP1 BRP2
(BOP1 + BRP1) / 2, (BOP2 + BRP2) / 2
5
-10
-2
-3
-2
Table 3: Magnetic specifications
7.5 10
-7.5 -5
2
3
2
0
1.45
Units
mT
mT
mT
mT
mT
ppm/°C
mm
DC Operating Parameters VDD = 2.7V to 24V and TA =-40°C to 150°C (unless otherwise specified)
Parameter
Symbol Test Conditions
Min Typ Max
Units
Operating Point
Release Point
Magnetic Matching
Magnetic Offset
Temperature Coefficient
Hall Plates Spacing
BOP
BRP
BMATCH
BOFF
TC
-
BOP1 BOP2 or BRP1 BRP2, TA = 25°C
BOP1 BOP2 or BRP1 BRP2
(BOP1 + BRP1) / 2, (BOP2 + BRP2) / 2
0.6 2.5 4.5 mT
-4.5 -2.5 -0.6
mT
-2 2 mT
-3 3 mT
-2 2 mT
-1100
ppm/°C
1.45 mm
Table 3: Magnetic specifications
Note: Temperature coefficient value is guaranteed by design and verified by characterization and is calculated using the
following formula:
 TC BT 2 BT1 *106, ppm /o C;
B25o C T2 T1
T1  40o C;
T2 150o C
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