Ptc Pt2262 User manual

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Remote Control Encoder PT2262

PT2262 v3.3 Page 1Revised May 1998

Princeton Technology

Corp.

PT2262 is a remote control encoder paired with PT2272 utilizing CMOS

Technology. It encodes data and address pins into a serial coded waveform suitable

for RF or IR modulation. PT2262 has a maximum of 12 bits of tri-state address pins

providing up to 531,441 (or 312) address codes; thereby, drastically reducing any

code collision and unauthorized code scanning possibilities.

rCMOS Technology

rLow Power Consumption

rVery High Noise Immunity

rUp to 12 Tri-State Code Address Pins

rUp to 6 Data Pins

rWide Range of Operating Voltage: Vcc = 4 ~ 15 Volts

rSingle Resistor Oscillator

rLatch or Momentary Output Type

rAvailable in DIP and SO Package

rCar Security System

rGarage Door Controller

rRemote Control Fan

rHome Security/Automation System

rRemote Control Toys

rRemote Control for Industrial Use

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Remote Control Encoder PT2262

PT2262 v3.3 Page 2Revised May 1998

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Remote Control Encoder PT2262

PT2262 v3.3 Page 3Revised May 1998

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Pin Name I/O Description Pin No.

18 Pins 20 Pins

A0 ~ A5 ICode Address Pin Nos.0 ~ 5

These six tri-state pins are detected by PT2262 to

determine the encoded waveform bit 0 ~ bit 5. Each

pin can be set to “0”, “1” or “f” (floating ).

1 ~ 6 1 ~ 6

A6/D5 ~ A11/D0 ICode Address Pin Nos.6 ~ 11/Data Pin Nos.5 ~ 0.

These six tri-state pins are detected by PT2262 to

determine the encoded waveform bit 6 ~ bit 11.

When these pins are used as address pins, they can

be set to “0”, “1”, or “f” (floating).

When these pins are used as data pins, they can be

set only to “0” or “1”.

7 ~ 8

10 ~ 13 7 ~ 8

12 ~ 15

TE ITransmission Enable.

Active Low Signal. PT2262 outputs the encoded

waveform to DOUT when this pin is pulled to low.

14 16

OSC 1 OOscillator Pin No.1 A resistor connected

between these two pins 15 17

OSC 2 IOscillator Pin No.2 determine the

fundamental frequency

of the PT2262.

16 18

DOUT OData Output Pin.

The encoded waveform is serially outputted to this

pin. When PT2262 is not transmitting, DOUT

outputs low (Vss) voltage.

17 19

Vcc -Positive Power Supply 18 20

Vss -Negative Power Supply 9 9

PT2262 encodes the code address and data set at A0 ~ A5 and A6/D5 ~ A11/D0

into a special waveform and outputs it to the DOUT when TE is pulled to “0” (Low

State). This waveform is fed to either the RF modulator or the IR transmitter for

transmission. The transmitted radio frequency or infrared ray is received by the RF

demodulator or IR receiver and reshaped to the special waveform. PT2272 is then

used to decode the waveform and set the corresponding output pin(s). Thus

completing a remote control encoding and decoding function.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 4Revised May 1998

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ACode 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.

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

Bit "0"

Bit "1"

Bit "f"

Floating

αα

1 bit = 32 αα

4 αα

12 αα

where : αα= Oscillating Clock Period

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 αα

4 bits width = 128 αα

Note : 1 bit = 32 αα

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Remote Control Encoder PT2262

PT2262 v3.3 Page 5Revised May 1998

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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 determined by the

corresponding states of A0 ~ A5 and A6/D5 ~ A11/D0 pins at the time of

transmission. When Data Type of PT2262 is used, the address bits will

decrease accordingly.

For example: In the 3 Data Type where the address has nine (9) bits, the

transmitting format is:

9 Address Bits 3 Data Bits Sync. Bit

PT2262 / PT2272 has a maximum of twelve (12) Address Bits including

the six (6) Address/Data bits. The following diagram shows the code bits

with their corresponding pins.

First bit transmitted

↓↓

A0 A1 A2 A3 A4 A5 A6

/D5 A7

/D4 A8

/D3 A9

/D2 A10

/D1 A11

/D0 SYNC

BIT

One Complete Code Word

0 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 Sync.Bit

1 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 D0 Sync.Bit

2 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 D1 D0 Sync.Bit

3 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 D2 D1 D0 Sync.Bit

4 Data A0 A1 A2 A3 A4 A5 A6 A7 D3 D2 D1 D0 Sync.Bit

5 Data A0 A1 A2 A3 A4 A5 A6 D4 D3 D2 D1 D0 Sync.Bit

6 Data A0 A1 A2 A3 A4 A5 D5 D4 D3 D2 D1 D0 Sync.Bit

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Remote Control Encoder PT2262

PT2262 v3.3 Page 6Revised May 1998

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The Code Bits A0 ~ A5 and A6/D5 ~ A11/D0 are determined by the states

of A0 ~ A5 and A6/D5 ~ A11/D0 pins. For example, when the A0 (Pin

No. 1) is set to “1” (Vcc), the Code Bit A0 is synthesized as “1” bit. In the

same manner, when it (A0 Pin) is set to “0” (Vss) or left floating, the Code

Bit A0 is synthesized as a “0” or “f” bit respectively.

A Code Frame consists of four (4) continuous Code Words. When

PT2262 detects “0” on the TE (meaning, the TE is active “low”), it

outputs a Code Frame at DOUT. If TE is still active at the time the Code

Frame transmission ends, PT2262 outputs another Code Frame. It should

be noted that the Code Frame is synthesized at the time of transmission.

The built–in oscillator circuitry of PT2262 allows a precision oscillator to

be constructed by connecting an external resistor between OSC1 and OSC2

pins. For PT2272 to decode correctly the received waveform, the

oscillator frequency of PT2272 must be 2.5 ~ 8 times that of transmitting

PT2262. The typical oscillator frequency with various resistor values for

both PT2262 and PT2272 are shown below :

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Remote Control Encoder PT2262

PT2262 v3.3 Page 7Revised May 1998

Princeton Technology

Corp.

Suggested oscillator resistor values are shown below.

PT2262 PT2272

4.7 MΩ820 KΩ*

3.3 MΩ680 KΩ*

1.2 MΩ200 KΩ**

Note: * -- Operates when PT2272 's Vcc=5V to 15V

** -- Operates when PT2272's Vcc=3V to 15V

This means that if PT2272 supply voltage is lower than 5 Volts, you need to use a

lower oscillator resistor value for both PT2262 and PT2272.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 8Revised May 1998

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Corp.

In the IR Type of Operation, the functions are similar to the above descriptions

except for the output waveform that has a carrier frequency of 38 KHz. Details are

as follows:

The Code Bits are further modulated with a 38 KHz carrier frequency and

can be “0” , “1” or “f” bit. Their waveforms are shown in the diagram

below.

Note : λλ = 2 clock lengths

A Code Word is made up of code bits and the format is the same as that of

the RF Code Word.

Likewise, a Code Frame is made up of Code Words and the format is the

same as that of RF Type of Operation.

The Oscillator Frequency for the IR Type of Operation is twice the carrier

frequency. Thus, the oscillator frequency should be kept at 76 kHz. A 430K

~ 470KΩoscillator resistor between OSC 1 and OSC 2 pins is

recommended. It should be noted that the carrier is a 50% duty cycle

frequency.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 9Revised May 1998

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Remote Control Encoder PT2262

PT2262 v3.3 Page 10 Revised May 1998

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UHF Band 4 Data Transmitter Circuit is recommended.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 11 Revised May 1998

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UHF Band Address-only (Zero Data) Transmitter Circuit is recommended.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 12 Revised May 1998

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UHF Band Address-only (Zero Data) Zero-Stand-by Transmitter Circuit is

recommended.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 13 Revised May 1998

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Infrared Ray 6-Data Circuit. Adjust Rosc to get 38 KHz Carrier Pulse at DOUT Pin

is recommended.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 14 Revised May 1998

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SYMBOL PARAMETER CONDITION RATING UNIT

Vcc Supply Voltage –0.3 ~ 16.0 Volt

VI Input Voltage –0.3 ~ Vcc+0.3 Volt

VO Output Voltage –0.3 ~ Vcc+0.3 Volt

Pa Maximum Power

Dissipation Vcc = 12 Volt 300 mW

Topr Operating

Temperature –20 ~ 70 °C

Tstg Storage Temperature –40 ~ 125 °C

PARAMETER SYMBOL TEST

CONDITION MIN. TYP. MAX. UNIT

Supply Voltage Vcc 4 15 Volt

Stand-by Current ISB Vcc=12 Volt

OSC2=12 Volts

A0 ~ A11 Open

0.1 1µA

DOUT Output

Driving Current IOH Vcc = 5 Volt

VOH = 3 Volt

-3 mA

Vcc = 8 Volt

VOH = 4 Volt -6 mA

Vcc = 12 Volt

VOH = 6 Volt

-10 mA

DOUT Output

Sinking Current IOL Vcc = 5 Volt

VOL=3 Volt 2mA

Vcc = 8 Volt

VOL = 4 Volt 5mA

Vcc = 12 Volt

VOL = 6 Volt

9mA

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Remote Control Encoder PT2262

PT2262 v3.3 Page 15 Revised May 1998

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Corp.

Valid Product No. Package

PT2262 18 Pins, DIP

PT2262-S18 18 Pins, SO

PT2262-IR 18 Pins, DIP

PT2262-S 20 Pins, SO

PT2262-IR-S 20 Pins, SO

PT 2262 - XX - X

Package Code :

Output Type :

Product Number

PTC Prefix

P : Plastic DIP (this code can be omitted)

S : Small Outline, 20 Pins

S18 : Small Outline, 18 Pins

RF : RF Application (can be omitted)

IR : IR Application

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Remote Control Encoder PT2262

PT2262 v3.3 Page 16 Revised May 1998

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Symbol Dimension in Mil

A900

B60

C60

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Remote Control Encoder PT2262

PT2262 v3.3 Page 17 Revised May 1998

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Symbol Dimensions in Inches

Min Nom Max

A0.095 0.100 0.105

A1 0.004 -0.011

A2 -0.092 -

B-0.016 REF -

C-0.010 REF -

D0.452 0.455 0.458

E (Bottom) 0.292 0.295 0.298

E (Top) -0.293 -

e-0.050 BSC -

H0.396 0.406 0.416

L-0.03 -

S0.0225 0.0275 0.0325

Note: 1. Controlling Dimension: Inch

2. Tolerance: .x +

.xx +.01

.xxx +.002

Angular +3o

3. Otherwise dimensions follow acceptable spec.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 18 Revised May 1998

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Symbol

Dimensions in

Millimeter Dimensions in Inches

Min Nom Max Min Nom Max

A2.36 2.49 2.64 0.093 0.098 0.104

A1 0.10 -0.30 0.004 -0.012

A2 -2.31 - - 0.091 -

B0.33 0.41 0.51 0.013 0.016 0.020

C0.18 0.23 0.28 0.007 0.009 0.011

D12.60 12.80 12.90 0.496 0.504 0.508

E7.39 7.49 7.59 0.291 0.295 0.299

e-1.27 - - 0.050 -

H10.01 10.31 10.64 0.394 0.406 0.419

L0.38 0.81 1.27 0.015 0.032 0.050

y- - 0.10 - - 0.004

θ0O-8O0O-8O

Note: 1. Controlling Dimension : Inch

2. Lead Frame Material : Copper 194

3. After solder plating lead thickness will be 0.015” max.

4. Dimension “D” does not include mold flash, protrusions or gate burrs.

5. Dimension “E” does not include interlead flash or protrusions.

6. Tolerance : ± 0.010” unless otherwise specified.

7. Otherwise dimensions follow acceptable spec.

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PTC PT2262 User manual

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