mx8871p Clare, Inc., mx8871p Datasheet - Page 2

• Manufacturer Part Number: mx8871p
• Description: Low Power Hall-effect Switch
• Manufacturer: Clare, Inc.

MX8871P
Circuit Description
The MX8871P Hall-Effect Switch consists of a Hall element, small signal amplifier, latch, and n-channel
open drain MOSFET driver. Offset cancellation rejects errors in signal stages and the influence of
mechanical stress on the Hall element. This technique together with a precision threshold generator and
comparator produce highly accurate magnetic switch points. The Hall element is activated for a fraction of
an operating cycle, then latched in that sample state for the remainder of the period. By using this
technique, reduced power consumption is achieved.
Electrical Characteristics
Over operating voltage and temperature range unless otherwise noted.
Notes: 1. Operating and release points will vary with supply voltage.
Magnetic Characteristics
Over operating voltage and temperature range unless otherwise noted.
Notes: 1. As use here, negative flux densities are defined as less than zero (algebraic convention) and -50G is less than +10G.
MX8871P
Drawing No. 887109
Pin Description
Pin No. Pin Name
Parameter
Supply Voltage
Output Leakage Current
Output On Voltage
Awake Time
Period
Duty Cycle
Supply Current
ESD
Parameter
Operating Points
Release Points
Hysteresis
1
2
3
2. B
3. Typical Data is at T
2. B
3. Typical Data is at T
OPX
OPX
V
OUT
GROUND
SUPPLY
= operating point (output turns ON); B
= operating point (output turns ON); B
B
B
B
B
B
Symbol
OPS
OPN
RPS
RPN
HYS
A
A
Description
2.5 to 5.5 Volt
CMOS Push-Pull
Ground
= 25°C and V
= 25°C and V
V
I
Awake (enabled)
Asleep (disabled)
Average (Calculated)
Human Body Model
South pole to branded side
North pole to branded side
South pole to branded side
North pole to branded side
| B
OUT
OUT
OPX
SUPPLY
SUPPLY
= 1mA, V
= 5.5V, B
– B
RPX
= 3.0V.
= 3.0V.
RPX
RPX
DD
|
= release point (output turns OFF).
= release point (output turns OFF).
Condition
RPN
Condition
= 3.0V
2
< B < B
RPS
Min
Min
-60
2.5
6
2
<1.0
Typ
Typ
125
50
5
6
IXYS
www.claremicronix.com
Max
Max
100
5.5
1.0
1.2
2.0
8.0
80
60
-6
10/29/07
Unit
Unit
mV
mS
mA
µA
µS
µA
µA
kV
%
G
G
G
G
G
V