Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2604
DESCRIPTION
PT2604 is a tri-state remote control decoder IC utilizing CMOS Technology. It provides 10 address
pins and 4 data pins. Code Format Compatible with HT604L, PT2604 is housed in 20 pins, DIP or SOP
Package and supports the Latch Data Output Type. It may be paired with PT2607 to provide a powerful
high performance remote control system. Pin assignments and application circuit are optimized for
easy PCB Layout and cost saving advantage.
FEATURES
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CMOS technology
Low power consumption
Low standby current
Operating voltage: 3 to 15V
Provides 10 address pins & 4 data pins
Built-in oscillator
Latch data output type
Least external components
Easy to use
Available in 20 pins, SOP or DIP
May be paired with PT2607
APPLICATIONS
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Car/Motorcycle security system
Home/Office security system
Garage door remote controller
Personal alarm system
Cordless telephone
Remote control for industrial use
Remote switch
PT2604 V1.1
-1-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2604
BLOCK DIAGRAM
OSC2 OSC1
O scillation
Circuit
Divider
Data Shift
Register
D12
Latch Circuit
D13
D14
D15
DIN
Buffer
Data Detector
Start Bit
Detector
Comparator
Comparator
Control Logic
Transmission Gate
Buffer
VT
A0 A1 A2 A3 A4 A6 A7 A8 A9 A11
VDD
VSS
PT2604 V1.1
-2-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2604
PIN CONFIGURATION
A 11
D 12
D 13
D 14
D 15
VT
DIN
OS C2
OS C1
1
2
3
4
5
6
7
8
9
20
19
18
17
VD D
A9
A8
A7
A6
A4
A3
A2
A1
A0
PT26 04
16
15
14
13
12
11
V SS 1 0
PIN DESCRIPTION
Pin Name
A11,
A0 ~ A4,
A6 ~ A9
D12 ~ D15
VT
DIN
OSC2
OSC1
VSS
VDD
I/O
I
O
O
I
O
I
-
-
Description
Address Input Pins
These pins may be externally set to “1”, “0” or “f”.
Data Output Pin
Valid Transmission Active High
Serial Data Input Pin
Oscillator Output Pin
Oscillator Input Pin
Negative Power Supply
Positive Power Supply
Pin No.
1,
11 ~ 15,
16 ~ 19
2~5
6
7
8
9
10
20
PT2604 V1.1
-3-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2604
FUNCTION DESCRIPTION
PT2604 may be paired with our remote control encoder -- PT2607. When PT2604 receives data
transmitted by encoders such as PT2607, it deciphers the 12 address bits and the 6 data bits. The DIN
Pin Signal activates the oscillator which in turn decodes the incoming address and data bits. Please
note under the Standby Mode, the oscillator is disabled. It is activated only if the DIN Pin is receiving
data.
PT2604 then compares the address which was received twice in a consecutive manner with its local
address. If all the data received match the local address of PT2607, the 6 bits of data are decoded and
transferred to the output pins. The VT Pin then is set to “HIGH” to indicate a that transmission is valid
until no signal or unmatched address codes are received. Please note the VT Pin is set to “HIGH” only
when there is valid transmission, otherwise, it is in “LOW” State.
Please refer to the Operation Flowchart diagram.
OPERATION FLOWCHART
Power On
Standby Mode
Disable VT &
Ignore the Res t of
This Word
Code In?
NO
YES
NO
Address Bits
Match?
YES
Store Data
YES
Match
with Previously
Stored Data?
YES
NO
Cons ecutive
Checking?
NO
YES
Latch Data to O utput
& Activate VT
NO
Address or
Data Error?
YES
PT2604 V1.1
-4-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Decoder IC
PT2604
CODE WORD
A Code Word consists of a Start Bit, 12 Address Bits and 6 Data Bits. Please refer to the diagram
below.
Start Bit
12 Address Bits
6 Data Bits
ADDRESS BITS & DATA BITS
Both Address and Data Bits can be designated as Bit “0”, “1” of “f”, if it is in “Low”, “High”, or “Floating”
State respectively. One bit waveform consists of 2 pulse cycles. Each pulse cycle has 48 oscillating
time periods. For further details, please refer to the diagram below.
OSC
1 bit=96
α
Bit "1"
32α
Bit "0"
16α
Bit "f"
32α
16α
where:
α=Oscillating
Clock Period
The Data Input Floating State is interpreted as “LOW” by the decoders since the decoder output only
provides for two states.
START BIT
The Start Bit consists of a pilot period (1,216α), followed by a 1/6 bit width pulse and 2-bit.
1/6 bit width=16α
1216
α
1424
α
PT2604 V1.1
-5-
April, 2006
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