Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
DESCRIPTION
PT2270 is a remote control decoder paired with PT2260 or PT2262 utilizing CMOS Technology. It has
12-bit of tri-state address pins providing a maximum of 531,441 (or 3
12
) address codes; thereby
drastically reducing any code collision and unauthorized code scanning possibilities. PT2270 is
available in several options to suit every application needs: variable number of data output pins, latch
or momentary output type.
When paired with PT2260, this encoder/decoder (PT2260 / PT2270) pair can operate at very wide
temperature range (-40℃ ~ +85℃). See also PT2260 Product Specification Features. Thus, this very
important feature enables your Encoder/Decoder to operate under the worst environmental condition.
FEATURES
•
•
•
•
•
•
•
•
CMOS technology
Low power consumption
Very high noise immunity
Up to 12 Tri-State code address pins
Up to 6 data pins
Operating voltage: V
CC
=2 ~ 10V
Single resistor oscillator
Latch or momentary output type
APPLICATIONS
•
•
•
•
•
•
Car security system
Garage door controller
Remote control fan
Home security/Automation system
Remote control toys
Remote control for industrial use
PT2270 V1.3
-1-
May, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
A8/D3
A9/D2
A10/D1
A11/D0
System
Timing
Tri-State
Address
Data
Detect
OSC
OSC1
OSC2
Control
Logic
Output
Logic
Compare
Logic
DIN
Data
Detect
Sync
Detect
VT
PT2270 V1.3
-2-
May, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
PIN CONFIGURATION
A0
A1
A2
A3
A4
A5
A6
A7
VSS
1
2
3
4
5
6
7
8
9
PT 2270
A0
A1
A2
A3
A4
A5
A6
A7
VSS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
P T2270-M3/L3
A0
A1
A2
A3
A4
A5
A6
D4
VSS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
P T2270-M5/L5
VCC
VT
OSC1
OSC2
DIN
D0
D1
D2
D3
A0
A1
A2
A3
A4
A5
D5
D4
VSS
1
2
3
4
5
6
7
8
9
VCC
VT
OSC1
OSC2
DIN
D0
D1
D2
A8
A0
A1
A2
A3
A4
A5
A6
A7
VSS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
VCC
VT
OSC1
OSC2
DIN
A11
A10
A9
A8
A0
A1
A2
A3
A4
A5
A6
A7
VSS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
P T2270-M2/L2
18
17
16
15
14
13
12
11
10
P T2270-M4/L4
18
17
16
15
14
13
12
11
10
P T2270-M6/L6
VCC
VT
OSC1
OSC2
DIN
D0
D1
D2
D3
VCC
VT
OSC1
OSC2
DIN
D0
D1
D2
D3
VCC
VT
OSC1
OSC2
DIN
D0
D1
A9
A8
PT2270 V1.3
-3-
May, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
PIN CONFIGURATION
Pin Name
A0 ~ A5
I/O
I
Description
Code Address Pin No. 0 ~ 5.
These six tri-state pins are detected by PT2270 to determine
the encoded waveform bit 0 ~ bit 5. Each pin can be set to “0”,
“1”, or “f” (floating).
Code Address Pin No. 6 ~ 11/Data Pin No. 5 ~ 0.
These six pins are used as higher address input bits or data
output pins depending on the version (type) of PT2270 used.
When used as address inputs, these pins are tri-state input pins
and each pin can be set to “0”, “1”, or “f” (floating).
When used as output pins, these pins are driven to V
CC
if (1) the
address decoded from the waveform that was received
matches the address setting at the address input pins, and (2)
the corresponding data bits received is a “1” bit. Otherwise,
they are driven to V
SS
.
Data Input Pin.
The encoded waveform received is serially fed to
PT2270 at this pin.
Oscillator Pin No.1 A resistor connected between these two
pins determine the fundamental
Oscillator Pin No. 2 frequency of PT2270.
Valid Transmission.
Active High Signal. VT in high state signifies that PT2270
receives valid transmission waveform.
Positive Power Supply
Negative Power Supply
Pin No.
1~6
A6/D5 ~ A11/D0
I/O
7~8
10 ~ 13
DIN
OSC 1
OSC 2
VT
V
CC
V
SS
I
I
O
O
-
-
14
16
15
17
18
9
PT2270 V1.3
-4-
May, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
FUNCTION DESCRIPTION
PT2270 decodes the waveform received and fed into the DIN pin. The Waveform is decoded into code
word that contains the address, data and sync bits. The decoded address bits are compared with the
address set at the address input pins. If both addresses match for 2 consecutive code words, PT2270
drives -- (1) the data output pin(s) whose corresponding data bit(s) is then decoded to be a “1” bit, and
(2) the VT output -- to high voltage (high state).
CODE BITS
A Code Bit is the basic component of the encoded waveform, and can be classified as either an AD
(Address/Data) Bit or a SYNC (Synchronous) Bit.
ADDRESS/DATA (AD) BIT WAVEFORM
An AD Bit can be designated as Bit “0”, “1” or “f” if it is in low, high or floating state respectively. One bit
waveform consists of 2 pulse cycles. Each pulse cycle has 16 oscillating time periods. For further
details, please refer to the diagram below:
α
OSC
1 bi t = 32α
B IT 0
4α
B IT 1
12
α
B IT " f"
F l oati ng
4α
Where:
1.
α=Oscillating
Clock Period
2. Bit “f” is only available for address bits
SYNCHRONOUS (SYNC.) BIT WAVEFORM
1/8 b it w idth =4
α
4 bi t wi dth= 12 8α
Note: 1-bit=32α
PT2270 V1.3
-5-
May, 2006
Microchip MCU
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