SS249

CMOS Omnipolar High Sensitivity Micropower Hall Switch

Typical Application Circuit

SEC's pole-independent sensing technique allows for operation with either a north pole or south pole magnet

orientation, enhancing the manufacturability of the device. The state-of-the-art technology provides the same output

polarity for either pole face.

It is strongly recommended that an external bypass be connected (in close proximity to the Hall sensor) between the

supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization

technique. This is especially true due to the relatively high impedance of battery supplies.

2

V2.10

May 1, 2012

Internal Timing Circuit

 

Current

Period

Sam

ut

ple & Outp

Latched

SS249

R2

C2

VDD

GND

OUT

C1

SS249

D1

Z1

C1

OUT

GND

VDD

C2

R2

R1:100

Automotive

and

Severe

Environment

Protection Circuit

Typical Three-Wire Application Circuit

Awake Taw: 175μs

Sleep Tsl: 70ms

0

Time