Tel：886-2-29162151
Fax：886-2-29174598
URL:
http://www.princeton.com.tw
Encoder IC
Description
PT2240B
PT2240B is encoder utilizing CMOS Technology specially designed for remote control applications. It has
20 Address. It can support up to 4 Data Bits and is housed in 8 pin SO Package. It encodes address and
data codes into a coded waveform suitable for RF modulation. The pin assignments and application circuit
are optimized for easy PCB Layout and cost saving advantage. Furthermore, PT2240B’s intrinsic feature
of being able to support 4 data bits considerably reduces inventory pressures.
Features
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CMOS Technology
Low Power Consumption
Least External Components
High Noise Immunity
Single Resistor Oscillator
Operating Voltage: 1.8~15 V
4 Data Pins
2
20
Address Codes
Available in SO Package
Reduction of Inventory Pressures
Applications
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Burglar Alarm System
Car Security System
Car/Garage Door Controller
Home/Office Security System
Personal Alarm System
PT2240B v1.0
- 1-
Mar. 2002
Tel：886-2-29162151
Fax：886-2-29174598
URL:
http://www.princeton.com.tw
Encoder IC
Application Circuits
1.8V~15V
V
CC
V
SS
D
OUT
D3
PT2240B
OSC
D0
D1
D2
Rosc
RF
Figure 2: PT2240B (8-pin) Application Circuit
Note: In order that IC protection is assured, please make sure that a diode is connected between the battery and the VDD. If the
diode is not connected and the battery polarity was inverted, then the IC will fail.
Rosc
V
CC
V
SS
OSC
D0
D1
D2
RF
D
OUT
D3
1.8V~15V
Figure 3: PT2240B Power Failure Application Circuit
Order Information
Valid Part Number
PT2240B
Package
8 Pins, SOP (150 mil)
PT2240B v1.0
- 3-
Mar. 2002
stm32/stm8
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