oh44 e unipolar hall effect switch ic page 1 nanjing nanjing nanjing nanjing ouzhuo ouzhuo ouzhuo ouzhuo technology technology technology technology co., co., co., co., ltd ltd ltd ltd www.ohhall.com www.zbling.com tel 86- 25-52312738 86-25- 83247886 fax: 86-25-52312738 e-mail: ohhall@163.com order order order order information information information information p n oh 44e operate temperature - 4 0 1 5 0 package 1000 pcs / bag general general general general description description description description : : : : oh 44e is a switched hall-effect ic which is for contactless switching applications. the device includes an on-chip hall voltage generator for magnetic sensing, an amplifier that amplifies the hall voltage, a schmitt trigger to provide switching hysteresis for noise rejection, and an open-collector output. features features features features ? high reliability ? good temperature performance ? anti-environmental stress ? reverse polarity protection absolute absolute absolute absolute maximum maximum maximum maximum ratings ratings ratings ratings t a =25 supply voltage v cc 4 - 30 v operating temperature range t a - 4 0 1 5 0 output current i o 5 0 ma storage temperature range t s - 6 5 150 electrical electrical electrical electrical characteristics characteristics characteristics characteristics (ta= 25 c ) parameter symbol conditions value unit min typ max supply voltage v cc 4 - 30 v output saturation voltage v ol vcc=4.5v, iout=2 0 ma b b op - 200 400 mv output leakage current i oh vout=24v b b rp - 1.0 10 a supply current i cc v cc = vccmax oc output - 5 - ma output rise time t r vcc=12v, r l =820 , c l =20pf - 0.2 2 . 0 s output falling time t f - 0.1 8 2.0 s applications applications applications applications ? speed measurement ? home appliances ? position detection ? flow measurement magnetic-electrical magnetic-electrical magnetic-electrical magnetic-electrical transfer transfer transfer transfer characteristics characteristics characteristics characteristics functional functional functional functional block block block block diagram diagram diagram diagram reg reg reg reg m amp pin1.v cc pin3.vout pin2.gnd v out b h b rp b op b v oh v ol 0
oh44 e unipolar hall effect switch ic page 2 nanjing nanjing nanjing nanjing ouzhuo ouzhuo ouzhuo ouzhuo technology technology technology technology co., co., co., co., ltd ltd ltd ltd www.ohhall.com www.zbling.com tel 86- 25-52312738 86-25- 83247886 fax: 86-25-52312738 e-mail: ohhall@163.com magnetic magnetic magnetic magnetic characteristics characteristics characteristics characteristics (ta= 25 c ) (1mt = 10 gauss) parameter symbol value unit min typ max operate point b op - - 20 mt r elease point b rp 3 - - mt hysteresis b h - 6 - mt test test test test circuit circuit circuit circuit for for for for reference reference reference reference dimension dimension dimension dimension unit:mm) unit:mm) unit:mm) unit:mm) vout vcc r l r l =820 c l =20 pf c l pin pin pin pin descriptions descriptions descriptions descriptions 1. v cc 2. gnd 3. vout caution: 1)when installing, please minimize mechanical stress on the ic shell and leads. 2)welding temperature should be lower than 260 , less than 3 seconds. 3)ic is oc output, so a pull-up resistor connected pin 1 (power) and pin 3 (output) is necessary.
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