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PDF PT2294 Data sheet ( Hoja de datos )
| Número de pieza | PT2294 | |
| Descripción | Remote Control Decoder IC | |
| Fabricantes | PTC | |
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Remote Control Decoder IC
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2294
DESCRIPTION
PT2294 is a remote control decoder paired with PT2264 utilizing CMOS Technology. It has 12 bits 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. PT2294 is available in
several options to suit every application needs: variable number of data output pins, latch or
momentary output type.
When paired with PT2264, this encoder/decoder (PT2264 / PT2294) pair can operate at very wide
temperature range (-40℃ ~ +85℃). See also PT2264 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 4 data pins
• Operating voltage: VCC=2.2 ~ 7V
• Single resistor oscillator
• Latch or momentary output type
APPLICATIONS
• Remote control fan
• Home security/Automation system
www.•DataRSehemet4oUte.cocmontrol toys
• Remote control for industrial use
• Remote control for door bell
PT2294 V1.2
-1-
April, 2006
1 page  
Remote Control Decoder IC
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2294
FUNCTION DESCRIPTION
PT2294 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, PT2294
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
BIT 0
BIT 1
BIT f
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4α
12 α
1 bit = 32α
4α
where:
α=Oscillating Clock Period
Bit “f” is only available for Address Bits
SYNCHRONOUS (SYNC.) BIT WAVEFORM
The Synchronous Bit Waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram
below:
Note: 1 bit = 32α
1/8 b it w idth =4 α
4 bit width=128α
PT2294 V1.2
-5-
April, 2006
5 Page 
Remote Control Decoder IC
Power On
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2294
Stand-by Mode
No
Signal In?
Disable VT &
Reset Output Data
(For Momentary Type)
Disable VT &
Sustain Output Data
(For Latch Type)
Yes
Address Bits
Match?
No
Yes Momentary Type? No
Yes
Store Data Bits
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Match Previous
Data?
No
Yes
No Address Bits
Match?
Yes
Store Data Bits
Match Previous
Data?
Yes
Data Bits Output
& Activate VT
No
PT2294 V1.2
Yes Address Still
Match?
No
Yes Address Still No
Match?
- 11 -
April, 2006
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet PT2294.PDF ] | |
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