Princeton Technology Corp
.
Programmable Encoder IC
Description
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2240
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
•
•
•
•
•
•
•
•
•
•
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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
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•
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Burglar Alarm System
Car Security System
Car/Garage Door Controller
Home/Office Security System
Personal Alarm System
PT2240 v 1.4
Page 1
Revised Nov.1999
Princeton Technology Corp
.
Programmable Encoder IC
Pin Configurations
1
VSS
2
VPG
S0
3
PGM
VDD
4
DOUT
D1/CODE
OSC
PT2240
D0/CLK
D1/CODE
D2
1
VSS
D3
2
PGM
3
D2
PINS)
4
D1/CODE
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2240
VSS
S1
VPG
D7
D6
D5
D4
PGM
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
8
7
6
5
VDD
DOUT
OSC
D0/CLK
(8 PINS)
8
7
6
5
VDD
DOUT
OSC
D0/CLK
PT2240 (16
PT2240-D3 (8 PINS)
Application Circuits
12V +
_
Vss
S1
VPG
D7
D6
D5
D4
PGM
S0
VDD
DOUT
OSC
D0/CLK
D1/CODE
D2
D3
Rosc
RF
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.
PT2240 v 1.4
Page 2
Revised Nov.1999
Princeton Technology Corp
.
Programmable Encoder IC
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2240
12V
+
_
Vss
VPG
PGM
VDD
DOUT
OSC
Rosc
RF
D1/CODE
D0/CLK
PT2240 (8 PINS)
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.
12V
+
_
Vss
PGM
D2
VDD
DOUT
OSC
Rosc
RF
D1/CODE
D0/CLK
PT2240-D3 (8 PINS)
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.
PT2240 v 1.4
Page 3
Revised Nov.1999
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