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Remote Control Decoder
PT2272
DESCRIPTION
PT2272 is a remote control decoder paired with 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. PT2272 is available in several options to suit every application need: variable number of data output pins, latch or momentary output type.
FEATURES
* * * * * * * * * CMOS Technology Low Power Consumption Very High Noise Immunity Up to 12 Tri-State Code Address Pins Up to 6 Data Pins Wide Range of Operating Voltage: VCC=4~15V Single Resistor Oscillator Latch or Momentary Output Type Available in DIP and SOP
APPLICATIONS
* * * * * * Car Security System Garage Door Controller Remote Control Fan Home Security/Automation System Remote Control Toys Remote Control for Industrial Use
PT2272 V3.7
-1-
June, 2008
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Remote Control Decoder
PT2272
BLOCK DIAGRAM
A0 A1 A2 A3 A4 A5 A6/D5 A7/D4 A8/D3 A9/D2 A10/D1 A11/D0 System Timing OSC1 OSC2
OSC
Tri-State Address Data Detect
Control Logic Output Logic Computer Logic
DIN
Data Detect
Sync Detect
VT
PT2272 V3.7
-2-
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Remote Control Decoder
PT2272
PIN CONFIGURATION
18 PINS
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 VCC VT OSC1 OSC2 DIN D0 D1 A9 A8
PT2272
PT2272A-M2/L2
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 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 D0 D1 D2 D3
PT2272-M3/L3
PT2272-M4/L4
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
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
18 17 16 15 14 13 12 11 10
VCC VT OSC1 OSC2 DIN D0 D1 D2 D3
PT2272-M5/L5
PT2272 V3.7 -3-
PT2272-M6/L6
June, 2008
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Remote Control Decoder
PT2272
20 PINS
PT2272 V3.7
-4-
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Remote Control Decoder
PT2272
PIN DESCRIPTION
Pin Name A0 ~ A5 I/O I Description Pin No. 18pins 20pins
A6/D5 ~ A11/D0
I/O
DIN OSC 1 OSC 2 VT VCC VSS NC
I I O O -
Code Address Pin Nos. 0 ~ 5. These six tri-state pins are detected by PT2272 to 1~6 1~6 determine the encoded waveform bit 0 ~ bit 5. Each pin can be set to "0", "1", or "f" (floating). Code Address Pin Nos. 6 ~ 11/Data Pin Nos. 5 ~ 0. These six pins are used as higher address input bits or data output pins depending on the version (type) of PT2272 used. When used as address inputs, these pins are tri-state input pins and each pin can be set to "0", 7~8 7~8 "1", or "f" (floating). 10 ~ 13 12 ~ 15 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 14 16 PT2272 at this pin. A resistor connected Oscillator Pin No.1 between these two pins 15 17 determine the fundamental frequency of Oscillator Pin No. 2 16 18 PT2272. Valid Transmission. Active High Signal. VT in high state signifies that 17 19 PT2272 receives valid transmission waveform. Positive Power Supply 18 20 Negative Power Supply 9 9 No Connection 10 ~ 11
PT2272 V3.7
-5-
June, 2008
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Remote Control Decoder
PT2272
FUNCTION DESCRIPTION
PT2272 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, PT2272 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).
RF OPERATION
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 bit = 32 BIT 0 4 BIT 1 12 BIT f Floating where: = Oscillating Clock Period Bit 1 is only available for Address Bit 4
PT2272 V3.7
-6-
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Remote Control Decoder
PT2272
Synchronous (Sync.) Bit Waveform The Synchronous Bit Waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below:
1/8 bit width = 4 4 bit width = 128 Note: 1 bit = 32
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 PT2272 version used. Please refer to the diagrams below: PT2272: A0 A1
A2
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
PT2272A-M2/L2: A0 A1 A2 A3 PT2272-M3/L3: A0 A1 A2 A3 PT2272-M4/L4: A0 A1 A2 A3 PT2272-M5/L5: A0 A1 A2 A3 PT2272-M6/L6: A0 A1 A2 A3
One Complete Code Word
PT2272 V3.7
-7-
June, 2008
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Remote Control Decoder SINGLE RESISTOR OSCILLATOR
PT2272
The built-in oscillator circuitry of PT2272 allows a precision oscillator to be constructed with only an external resistor. For the PT2272 to decode correctly the waveform that was received, the oscillator frequency of PT2272 must be 2.5~8 times that of the transmitting PT2262. It is a good practice to center the PT2272 oscillator frequency in this window to gain best window margin at both sides. The typical oscillator with various resistor values is shown below for both PT2262 and PT2272.
Encoder OSC Frequency
KHz 100 R = 510 K R=1M R=2M 10 R = 3.3 M R = 4.7 M 100 KHz 1000
Decoder OSC Frequency
R = 100 K R = 240 K R = 510 K R=1M 10 R=2M
1 3 6 9 12 15 3 6 9 12 15 V O LTAG E V O LTAG E
Suggested oscillator resistor values are shown below. PT2262 4.7M 3.3M 1.2M Note: * -- Operates when PT2272's VCC=5V to 15V ** -- Operates when PT2272's VCC= 4V to 15V This means that if the PT2272 supply voltage is lower than 5V, you have to use a lower oscillator resistor value for both PT2262 and PT2272. PT2272 820K * 680K * 200K **
PT2272 V3.7
-8-
June, 2008
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Remote Control Decoder
PT2272
IR OPERATION
In the IR Type of Operation, the functions are similar to the above descriptions, except that the output waveform carried by PT2262-IR has a frequency of 38KHz. Details are as follows.
CODE BITS
The Code Bits are further modulated with a 38KHz carrier frequency and can be "0", "1" or "f" bit. Their waveforms are shown in the diagram below.
OSC 0 1 f Sync 20 Note: = 2 clock lengths 620 20 60 160
CODE WORD
A Code Word is made up of code bits and the format is the same as that of the RF Code Frame.
CODE FRAME
Likewise, a Code Frame is made up of Code Words and the format is the same as that of RF Type of Operation.
OSCILLATOR
PT2262-IR is specially designed for infrared remote control applications and its output waveform carries 38KHz frequency. To get the 38KHz carrier frequency at the data output, the oscillator frequency must be 76KHz. A 440K resistor connected between OSC1 and OSC2 pins of PT2262-IR is recommended. Moreover, for a matching decoder frequency, 1M resistor connected between the OSC1 and OSC2 pins of PT2272 is also recommended.
PT2272 V3.7
-9-
June, 2008
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Remote Control Decoder
PT2272
VALID TRANSMISSION
When PT2272 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, PT2272 (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 DIN Data pins (momentary) VT ta = 8 OSC clock width tb = 1 OSC clock width tc = 2 code word width 1st word Sync bit
2nd word
ta tb
tc
LATCH OR MOMENTARY DATA OUTPUT TYPE
PT2272 uses either the latch or the momentary data output type depending on the PT2272 version used. The latch type (PT2272-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 (PT2272-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 DIN T DATA PINS (Momentary) DATA OUTPUT X T DATA OUTPUT Y DATA WORDS
DATA PINS (Latch)
DATA OUTPUT X
DATA OUTPUT Y
VT
T = 2 CODE WORDS WIDTH
PT2272 V3.7
- 10 -
June, 2008
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Remote Control Decoder
PT2272
OPERATION FLOWCHART
DECODER WITHOUT DATA OUTPUT PIN
1. When Power is turned on, PT2272 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 Disable VT No Signal In? Yes Address Bits Match? Yes No No
Address Bits Match? Yes Activate VT
Yes
Address Bits Still Match? No
Yes
Address Bits Still Match?
No
PT2272 V3.7
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Remote Control Decoder
PT2272
DECODER WITH DATA OUTPUT PINS
1. When Power is turned ON, PT2272 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. 3. 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. Also, 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.
Power ON Stand-By Mode No
Signal In? Yes Address Bit Match? Yes Store Data Bits No
Disable VT & Reset Output Data (For Momentary Type)
Disable VT & Sustain Output Data (For Latch Type)
Match No Previous Data? Yes No Address Bits Match? Yes Data Bits Output & Activate VT
Yes
Address Bits Still Match? No
Yes
Address Bits Still Match?
No
PT2272 V3.7
- 12 -
June, 2008
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Remote Control Decoder
PT2272
ABSLOUTE MAXIMUM RATINGS
Parameter Supply Voltage Input Voltage Output Voltage Operating Temperature Storage Temperature Symbol VCC VI VO Topr Tstg Rating -0.3 ~ 16.0 -0.3 ~ VCC+0.3 -0.3 ~ VCC+0.3 -40 ~ +85 -65 ~ 150 Unit V V V
DC ELECTRICAL CHARACTERISTICS
Parameter Supply Voltage Stand-by Current Symbol VCC ISB Conditions VCC = 12V DIN = 0V OSC1 = 0V VCC = 5V VOH = 3V VCC = 8V VOH = 4V VCC = 12V VOH = 6V VCC = 5V VOH = 3V VCC = 8V VOH = 4V VCC = 12V VOH = 6V VCC VCC Min. 4 -3 -6 -10 2 5 9 0.7VCC 0 Typ. 0.1 Max. 15 1 VCC 0.3VCC Unit V A mA mA mA mA mA mA V V
DOUT Output Driving Current
IOH
DOUT Output Sinking Current
IOL
"H" Input Voltage "L" Input Voltage
VIH VIL
PT2272 V3.7
- 13 -
June, 2008
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Remote Control Decoder
PT2272
APPLICATION CIRCUIT
PT2272 (NO DATA) RF APPLICATION
1 2 3 4 5 6 7 8 9 A0 A1 A2 A3 A4 A5 A6 A7 VSS VCC 18 VT 17 OSC1 16 OSC2 15 DIN 14 A11 13 A10 12 A9 11 A8 10 Rosc RF 5V
PT2272
PT2272 (4 DATA) RF APPLICATION CIRCUIT
1 2 3 4 5 6 7 8 9 A0 A1 A2 A3 A4 A5 A6 A7 VSS VCC 18 VT 17 OSC1 16 OSC2 15 DIN 14 D0 13 D1 12 D2 11 D3 10
5V
560
Rosc RF
560 560 560 560
PT2272-L4
PT2272 V3.7 - 14 June, 2008
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Remote Control Decoder
PT2272
PT2272 (4 DATA) IR APPLICATION CIRCUIT
1 2 3 4 5 6 7 8 9
A0 A1 A2 A3 A4 A5 A6 A7 VSS
VCC 18 VT 17 OSC1 16 OSC2 15 DIN 14 D0 13 D1 12 D2 11 D3 10
560
Rosc
560 560 560 560
PT2272-L4
NPN 10K
5V
Receiver
PT2272 V3.7
- 15 -
June, 2008
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Remote Control Decoder
PT2272
ORDER INFORMATION
Valid Part No. PT2272A-M2-S18 Valid Part No. PT2272 PT2272-L2 PT2272-L3 PT2272-L4 PT2272-L5 PT2272-L6 PT2272-M2 PT2272-M3 PT2272-M4 PT2272-M5 PT2272-M6 PT2272A-L2 PT2272A-M2 Valid Part No. PT2272-S PT2272-L3S PT2272-L4S PT2272-L5S PT2272-L6S PT2272-M2S PT2272-M3S PT2272-M4S PT2272-M5S PT2272-M6S PT2272A-L2S PT2272A-M2S Package Type 18 PINS, SOP Package Type 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP 18 PINS, DIP Package Type 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP 20 PINS, SOP Data Bits 2 Data Bits 2 3 4 5 6 2 3 4 5 6 2 2 Data Bits 3 4 5 6 2 3 4 5 6 2 2 Output Type Momentary Output Type * Latch Latch Latch Latch Latch Momentary Momentary Momentary Momentary Momentary Latch Momentary Output Type * Latch Latch Latch Latch Momentary Momentary Momentary Momentary Momentary Latch Momentary Top Code PT2272 Top Code PT2272 PT2272-L2 PT2272-L3 PT2272-L4 PT2272-L5 PT2272-L6 PT2272-M2 PT2272-M3 PT2272-M4 PT2272-M5 PT2272-M6 PT2272A-L2 PT2272A-M2 Top Code PT2272-S PT2272-L3S PT2272-L4S PT2272-L5S PT2272-L6S PT2272-M2S PT2272-M3S PT2272-M4S PT2272-M5S PT2272-M6S PT2272A-L2S PT2272A-M2S
Note: *=use VT (Valid Transmission).
PT2272 V3.7
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June, 2008
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Remote Control Decoder
PT2272
PACKAGE INFORMATION
18 PINS, SOP, 300MIL
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 BASIC
PT2272 V3.7
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Remote Control Decoder
PT2272
Notes: 1. Dimensioning and tolerancing per ANSI Y14.5-1982. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold Flash. protrusion or gate burrs shall not exceed 0.15mm (0.006 in) per side. 3. Dimension "E" does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm (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 substrate. 6. "N" is the number of terminal positions. (N=18) 7. The lead width "B" as measured 0.36mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (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.
PT2272 V3.7
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June, 2008
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Remote Control Decoder
PT2272
18 PINS, DIP, 300MIL
PT2272 V3.7
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Remote Control Decoder
PT2272
Symbol A A1 A2 b b2 b3 c D D1 E E1 e eA eB eC L
Min. 0.15 0.115 0.014 0.045 0.03 0.008 0.88 0.005 0.30 0.24
Nom.
Max. 0.21 0.195 0.022 0.07 0.045 0.014 0.92 0.325 0.28 0.43 0.60 0.15
0.13 0.018 0.06 0.039 0.01 0.90 0.31 0.25 0.1 BASIC 0.3 BASIC 0.13
0.00 0.115
Notes: 1. All dimensioning are in INCHES. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension"A","A1"and "L" are measured with 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 leads unconstrained. 7. "N" is the number of terminal position (N=18). 8. Pointed or rounded lead tips are preferred to ease insertion. 9. "b2" and "b3" maximum dimensions are not include dambar protrusions. Damber protrusions shall not exceed 0.010 inch (0.25mm) 10. Distance between leads including Damber 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.
PT2272 V3.7
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Remote Control Decoder
PT2272
20PINS, SOP, 300 MIL
Symbol A A1 B C D E e H h L
Min. 2.35 0.10 0.33 0.23 12.60 7.40 10.00 0.25 0.40 0
Nom.
Max. 2.65 0.30 0.51 0.32 13.00 7.60 10.65 0.75 1.27 8
1.27 bsc.
PT2272 V3.7
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Remote Control Decoder
PT2272
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=20) 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 AC. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2272 V3.7
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