AH174
Inverted Output Hall Effect Latch For High Temperature


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. 0.7 May 7, 2004
1/6

„ Features

- Bipolar Hall effect latch sensor
- 3.5V to 20V DC operation voltage
- Open collector pre-driver
- 25mA output sink current
- Chip power reverse-connection protection
- Operating temperature: C125~C40 °+°−
- Package: SIP3, SOT23


„ Applications

- Rotor position sensing
- Current switch
- Encoder
- RPM detection



„ Pin Assignment

(SIP3 package)
( SOT23 package)
1. VCC
2. GND
3.
OUT
1. VCC
3.
GND 2.
OUT
(Top view)

„ General Description

AH174 is a single-digital-output Hall-effect sensor
for high temperature operation. The device includes
an on-chip Hall voltage generator for magnetic
sensing, an amplifier to amplify Hall voltage, and a
comparator to provide switching hysteresis for noise
rejection, and an open-collector output pre-driver.
An internal bandgap regulator is used to provide
temperature compensated supply voltage for
internal circuits and allows a wide operating supply
range. While the magnetic flux density (B) is larger
than threshold Bop, the OUT pin turns off (High).
If B removed toward Brp, the OUT pin is latched
“off” state prior to B < Brp. When B < Brp, the OUT
pin go into “ on ” state.




„ Pin Descriptions

Name Description
VCC Input power
GND Ground
OUT
Inverted output stage


„ Ordering Information

AH174 X -XX X -X
Packing
Blank : Tube
A : Taping
P: SIP3
W: SOT23
Package Lead
L : Lead Free
Blank: Normal
Wafer Body
Magnetic
Characteristics
Blank or
A~Z : if necessary
to specify
A or B