Princeton Technology Corp
.
Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Programmable Encoder IC
PT2240
PT2240 v 1.4
Page 1
Revised Nov.1999
Description
PT2240 is programmable encoder utilizing CMOS Technology specially designed for remote
control applications. It has a maximum of 22 Address which may be designed by a one-time
programmable process. It can support up to 8 Data Bits and is housed in 8 or 16-pin DIP or 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, PT2240's intrinsic feature of being able to support 2/3/4/6/8 data bits
considerably reduces inventory pressures.
Features
CMOS Technology
Low Power Consumption
Least External Components
High Noise Immunity
Single Resistor Oscillator
Operating Voltage: 1.8~15 V
Up to 8 Data Pins
Up to 2
22
Address Codes
One-Time Programmable Process
Available in SO or DIP Package
Reduction of Inventory Pressures
Applications
Burglar Alarm System
Car Security System
Car/Garage Door Controller
Home/Office Security System
Personal Alarm System
Princeton Technology Corp
.
Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Programmable Encoder IC
PT2240
PT2240 v 1.4
Page 2
Revised Nov.1999
Pin Configurations
1
2
3
4
1
2
3
4
8
7
6
5
8
7
6
5
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VSS
S1
VPG
D7
D6
D5
D4
PGM
S0
VDD
DOUT
OSC
D0/CLK
D1/CODE
D2
D3
PT2240 (16 PINS)
VSS
VPG
PGM
D1/CODE
VSS
PGM
D1/CODE
D2
VDD
DOUT
OSC
D0/CLK
VDD
DOUT
OSC
D0/CLK
PT2240 (8 PINS)
PT2240-D3 (8 PINS)
Application Circuits
RF
Rosc
12V
Vss
S1
VPG
D7
D6
D5
D4
PGM
S0
VDD
DOUT
OSC
D0/CLK
D1/CODE
D2
D3
+
_
Figure 1: PT2240 (8 Data) 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.
Princeton Technology Corp
.
Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Programmable Encoder IC
PT2240
PT2240 v 1.4
Page 3
Revised Nov.1999
Vss
VPG
PGM
D1/CODE
VDD
DOUT
OSC
D0/CLK
PT2240 (8 PINS)
RF
12V
Rosc
+
_
Figure 2: PT2240 (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.
Vss
PGM
D1/CODE
D2
VDD
DOUT
OSC
D0/CLK
PT2240-D3 (8 PINS)
RF
12V
Rosc
+
_
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.
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