U2535B

 ` Low current requirement (typical 260 A/ 12 V)
 ` Carrier frequencies 20 to 100 kHz
 ` Supply voltages:
      5 or 7 to 16 V with internal stabilization
 ` Filter characteristics and gain are specified by few external components
 ` Demodulator with Schmitt trigger
 ` Open collector output

· Keyless entry
· Remote control
· Wireless data transfer

The IC U2535B is a complete IR receiver for data communication. The PIN photodiode converts the transmittedIR telegram into electronic input signals. This is separated by a special input circuit. The characteristics (filter, gain) of the following amplifier are determined by external components. The signal detector, consisting of a comparator, an integrator and a Schmitt trigger, forms the input signal to an output pulse that can be interfaced to a microcomputer.