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U2535B Datasheet, PDF (1/6 Pages) TEMIC Semiconductors – Preamplifier for IR Remote Control
Preamplifier for IR Remote Control
U2535B
Description
The IC U2535B is a complete IR receiver for data com-
munication. The PIN photodiode converts the transmitted
IR telegram into electronic input signals. This is sepa-
rated by a special input circuit. The characteristics (filter,
gain) of the following amplifier are determined by exter-
nal 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.
Features
m D Low current requirement (typical 260 A/ 12 V)
D Carrier frequencies 20 to 100 kHz
D Supply voltages:
5 or 7 to 16 V with internal stabilization
D Filter characteristics and gain are specified by few
external components
D Demodulator with Schmitt trigger
D Open collector output
Applications
D Keyless entry
D Remote control
D Wireless data transfer
Ordering Information
Extended Type Number
U2535B-FP
Block Diagram
95 9958
Supply voltage
for PIN diode
IN
–
8
+
Package
SO8
Remarks
5
VS
1 kW
+V
10 mF
7
+VCC
m VS1 10 F
+
4
–
+
Integrator
–
OSW
6
1
2
3
GND
A1
R1
A0
C3
C1
C2
C3
R2
Figure 1. Block diagram
Rev. A2, 15-Oct-98
1 (6)