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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 312) 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: VCC=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 VCC 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 VSS. 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 VCC VSS
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:
OSC 1 bi t = 32 B IT 0 4 B IT 1 12 B IT " f" F l oati ng 4
Where: 1. =Oscillating Clock Period 2. Bit "f" is only available for address bits
SYNCHRONOUS (SYNC.) BIT WAVEFORM
1/8 b it w idth =4 4 bi t wi dth= 12 8
Note: 1-bit=32
PT2270 V1.3
-5-
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
CODE WORD
A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync Bit. The 12 AD bits are interpreted as either address or data bits depending on the PT2270 version used. Please refer to the diagrams below. PT2270: A0 A1 A2 A3 A3 A3 A3 A3 A3 A4 A4 A4 A4 A4 A4 A5 A5 A5 A5 A5 A5 A6 A6 A6 A6 A6 D5 A7 A7 A7 A7 D4 D4 A8 A8 A8 D3 D3 D3 A9 A9 D2 D2 D2 D2 A10 D1 D1 D1 D1 D1 A11 D0 D0 D0 D0 D0 SYNC SYNC SYNC SYNC SYNC SYNC
PT2270-M2/L2: A0 A1 A2 PT2270-M3/L3: A0 A1 A2 PT2270-M4/L4: A0 A1 A2 PT2270-M5/L5: A0 A1 A2 PT2270-M6/L6: A0 A1 A2
One Complete Code Word
PT2270 V1.3
-6-
May, 2006
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Remote Control Decoder IC
PT2270
SINGLE RESISTOR OSCILLATOR
The built-in oscillator circuitry of PT2270 allows a precision oscillator to be constructed with only an external resistor. For the PT2270 to decode correctly the waveform that was received, the oscillator frequency of PT2270 must be 1/16 ~ 4 (or 2 to 30) times that of the transmitting PT2260 (or PT2262). It is a good practice to center the PT2270 oscillator frequency in this window to gain best window margin at both sides. The typical oscillator with various resistor values are shown below for PT2260, PT2262 and PT2270.
100 R=510K R=1M R=2M 10 R=3.3M R=4.7M
KHz 50 0 40 0 R=680K 30 0 25 0 20 0 10 0 R=820K R=1M R=2M R=470K
KHz
1 3 6 9 Voltage 12 15
1
2
3 Voltage (V)
4
5
6
PT2262 Encoder OSC Frequency
160 FREQUENCY (KHz) 140 120 100 80 60 40 20 0 2 4 6 VOLTAGE (V) 8
PT2260 Encoder OSC Frequency
Rosc =510 K Ohms Rosc=620K Ohms
Rosc=1.0 M Ohms Rosc=1.2 M Ohms Rosc=2.2 M Ohms
10
PT2270 Decoder OSC Frequency Suggested oscillator resistor values are shown below. PT2260 PT2270 820K 1.0M 1.0M 1.2M 2.0M 2.2M PT2262 1.2M 1.5M 3.3M PT2270 120K 160K 390K
PT2270 V1.3
-7-
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
VALID TRANSMISSION
When PT2270 receives a transmission code word, it initially checks whether this is a valid transmission. For a transmission to be valid, (1) it must be a Complete Code Word, and (2) the Address Bits must match the Address Setting at the Address Pins. After two consecutive valid transmissions, PT2270 (1) drives the data pins according to the data bits received, and (2) raises VT to high voltage (high state). The timings are shown in the following diagram.
Sync Bit 1st Word 2nd Word Sync Bit
DIN
2tc
Data Pins (M om entary)
VT
Note: tc=Width of 1 Code Word
LATCH OR MOMENTARY DATA OUTPUT TYPE
PT2270 uses either the latch or the momentary data output type depending on the PT2270 version used. The latch type (PT2270-Lx) activates the data out during transmission and this data is sustained in the memory until another data is inputted or entered. A momentary type (PT2270-Mx), on the other hand, activates the data out only during transmission. In the momentary type, the data does not remain in the memory after the transmission is completed. Please refer to the diagram below.
Data Words (X) Data Words (Y) DIN 2tc 2tc Data Output X 2tc 2tc Data Output Y
DATA PINS (Momentary) DATA PINS (Latch)
Data Output X
Data Output Y
VT
Note: tc=Width of 1 Code Word
PT2270 V1.3 -8May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
OPERATION FLOWCHART
DECODER WITHOUT DATA OUTPUT PIN
1. When Power is turned on, PT2270 activates the Stand-By Mode. 2. It then searches for signals. If there is no signal received, it remains in the Stand-By Mode; otherwise, the address bits received are compared with the address configuration of the pins. 3. The VT goes high signifying the validation of transmission only when there are two (2) continuous frames that contain matched address bits; otherwise, VT will not be activated and the Stand-By Mode remains active. 4. Then, the Address Bits are again checked. Two continuous mismatches of the address bits would disable the VT and make the Stand-By Mode active; otherwise, the address bits are continuously checked.
Power ON
Stand-by Mode
No
Signal In? Yes Address Bits Match? Yes Address Bits Match? Yes Activate VT No No
Disable VT
Yes
Address Still Match? No
Yes
Address Still Match?
No
PT2270 V1.3
-9-
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC DECODER WITH DATA OUTPUT PINS
PT2270
1. When Power is turned ON, PT2270 activates the Stand-By Mode. 2. It then searches for signals. If there is no signal received, it remains in the Stand-By Mode; otherwise, the address bits are compared with the address configuration of the pins. Whenever the Address Bits in a Frame match with that of the Address Configuration of the Pin, the data bits are stored into the memory. When the result is a match, it then undergoes another matching (Address Bits in the Frame vs. Address Configuration of the Pin) and storing (data bits stored in the memory) process. When this IC finds two (2) continuous and identical data having the same address bits, the data output(s) is activated and the VT is enabled. The VT is disabled when there are 2 continuous mismatched addresses. For the momentary type, the data output is reset; while for the latch type, the data output is sustained.
PT2270 V1.3
- 10 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
PT2270 V1.3
- 11 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
ABSOLUTE MAXIMUM RATINGS
Parameter Operating temperature Storage temperature Symbol Topr Tstg Rating -40 ~ +85 -65 ~ +150 Unit
DC ELECTRICAL CHARACTERISTICS
Parameter Supply voltage Standby current D0~D5 output driving current D0~D5 output sinking current DIN high level input voltage DIN low level input voltage VT output driving current Symbol VCC ISB IOH IOL VIH VIL IOH Min. 2.0 3 -2 0.7VCC 0 3 Typ. 5.0 0.1 5 -4 6 Max. 10.0 1 VCC 0.3VCC Unit V A mA mA V V mA
PT2270 V1.3
- 12 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
APPLICATION CIRCUIT
PT2270 V1.3
- 13 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
ORDER INFORMATION
Valid Part Number PT2270 PT2270-L2 PT2270-M2 PT2270-L3 PT2270-M3 PT2270-L4 PT2270-M4 PT2270-L5 PT2270-M5 PT2270-L6 PT2270-M6 PT2270-S PT2270-L2S PT2270-M2S PT2270-L3S PT2270-M3S PT2270-L4S PT2270-M4S PT2270-L5S PT2270-M5S PT2270-L6S PT2270-M6S Package Type 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, DIP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil 18 Pins, SOP, 300mil Top Code PT2270 PT2270-L2 PT2270-M2 PT2270-L3 PT2270-M3 PT2270-L4 PT2270-M4 PT2270-L5 PT2270-M5 PT2270-L6 PT2270-M6 PT2270-S PT2270-L2S PT2270-M2S PT2270-L3S PT2270-M3S PT2270-L4S PT2270-M4S PT2270-L5S PT2270-M5S PT2270-L6S PT2270-M6S
PT2270 V1.3
- 14 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
PACKAGE INFORMATION
18 PINS, DIP, 300MIL
PT2270 V1.3
- 15 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
Symbol A A1 A2 b b1 b2 b3 c c1 D D1 E E1 e eA eB eC L Min. 0.015 0.115 0.014 0.014 0.045 0.030 0.008 0.008 0.880 0.005 0.300 0.240 Nom. 0.130 0.018 0.018 0.060 0.039 0.010 0.010 0.900 0.310 0.250 0.100 bsc. 0.300 bsc. 0.130 Max. 0.210 0.195 0.022 0.020 0.070 0.045 0.014 0.011 0.920 0.325 0.280 0.430 0.060 0.150
PT2270
0.000 0.115
Notes: 1. All dimensions are in INCHS. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimensions "A", "A1" and "L" are measured with the package seated in JEDEC Seating Plane Gauge GS-3. 4. "D", "D1" and "E1" dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch. 5. "E" and "eA" measured with the leads constrained to be perpendicular to datum -c-. 6. "eB" and "eC" are measured at the lead tips with the loads unconstrained. 7. "N" is the number of terminal positions. (N=18) 8. Pointed or rounded lead tips are preferred to ease insertion. 9. "b2" and "b3" maximum dimensions are not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25 mm). 10. Distance between leads including Dambar protrusions to be 0.005 inch minimum. 11. Datum plane -H- coincident with the bottom of lead, where lead exits body. 12. Refer to JEDEC MS-001 Variation AC. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2270 V1.3
- 16 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
18 PINS, SOP, 300MIL
N
INDEX AREA
H E -B-
.25 (.010) M B M
1
2
3 L
-A-
D
SEATING PLANE A -C A1 B .10 (.004)
h X 45
-e-
C
.25 (.010) M C A M B S
Symbol A A1 B C D E e H h L
Min. 2.35 0.10 0.33 0.23 11.35 7.40 10.00 0.25 0.40 0
Nom.
Max. 2.65 0.30 0.51 0.32 11.75 7.60 10.65 0.75 1.27 8
1.27 bsc.
PT2270 V1.3
- 17 -
May, 2006
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2270
Notes: 1. Dimensioning and tolerancing per ANSI Y14.5M-1982. 2. Dimension "D"does not include mold flash, protrusions or gate burrs. Mold Flash, protrusion or gate burrs shall not exceed 0.15 mm (0.006 in) per side. 3. Dimension "E" does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. The chamfer on the body is optional. It is not present, a visual index feature must be located within the crosshatched area. 5. "L" is the length of the terminal for soldering to a substrate. 6. N is the number of the terminal positions (N=18) 7. The lead width "B" as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.24 in). 8. Controlling dimension: MILLIMETER. 9. Refer to JEDEC MS-013, Variation AB. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2270 V1.3
- 18 -
May, 2006

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