Princeton Technology Corp. Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Receiver PT2249A / PT2250A Series
PT2249A/50A v 2.3 Page 1 Revised Dec. 1999
Description
The PT2249A / PT2250A Series are infra-red remote control receivers utilizing
CMOS Technology. Remote Control System can be constructed together with the
PT2248 remote control encoder. The PT2249A Series are packaged in 16 pins
DIP and are capable of controlling 10 functions while the PT2250A Series are
packaged in 24 pins DIP and are capable of controlling 18 functions. Several
options, inverting/non-inverting IR signal input and/or dependent/independent
cyclic (toggle) outputs, are provided to fit different application needs.
Features
!CMOS Technology
!Low Power Consumption
!Very High Noise Immunity
!Able to output parallel multiple keying signals sent from the transmitter
(PT2249A is able to output up to 5 functions simultaneously while
PT2250A is able to output up to 6 functions simultaneously)
!Outputs for single pulse, hold pulse and cyclic pulse are provided
!A single terminal type oscillator by means of RC is provided
!Code Detection Circuit prevents interference from various ty pes of
m achines and apparatus
!Digital Filtering and Code Checking prevent interference from light
sources such as PL Lamp without sacrificing the receiving sensitivity
Applications
!Audio Equipment Remote Control
!Television (TV) Rem ote Control
!Video Cassette Recorder (VCR) Rem ote Control
Princeton Technology Corp. Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Receiver PT2249A / PT2250A Series
PT2249A/50A v 2.3 Page 2 Revised Dec. 1999
Pin Configurations
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
RXIN
HP1
HP2
HP3
HP4
HP5
SP5
SS
V
OSC
CODE2
CODE3
SP1
SP2
SP3
SP4
CC
PT2249A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
RXIN
HP1
HP2
HP3
HP4
HP5
CP2
SS
V
OSC
CODE2
CODE3
SP1
SP2
SP3
CP1
CC
PT2249AI / PT2249AI N
PT2249A L / PT224 9ALN
PT2249AH / PT2249AHN
(16 PDIP 300 mil) (16 PDIP 300 mil)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
RXIN
HP1
HP2
HP3
HP4
HP5
HP6
CP2
CP1
SP10
SP9
SS
V
OSC
CODE1
CODE2
SP1
SP2
SP3
SP4
SP5
SP6
SP7
SP8
CC
PT2250A /PT2250AN
PT2250 A L / P T2250ALN
(24 PDIP 600 mil)
A
N
I
L
H
A dvanced Version
Inv ersed R X IN Input
Independent Cyclic (Toggle) O utputs
Advanced Dependent Cyclic (Toggle) O utputs)
O utput Format sam e as "L", except that
wh en H P1 or HP 2 is a ctiv e , it will clea r C P 1 .
-
-
-
-
-
Princeton Technology Corp. Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Receiver PT2249A / PT2250A Series
PT2249A/50A v 2.3 Page 3 Revised Dec. 1999
Application Circuit
PT2249A
CONTROL
SIGNAL
OUTPUT
CONTROL
SIGNAL
OUTPUT
Vcc
1000pF
RX
INPUT
39K
PT2250A
CONTROL SIGNAL OUTPUT
CONTROL SIGNAL OUTPUT
RX
INPUT
Vcc
1000pF 39K
Princeton Technology Corp. Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Receiver PT2249A / PT2250A Series
PT2249A/50A v 2.3 Page 4 Revised Dec. 1999
Application Note:
1. Combination of PT2248/PT2249A Series Code Bits
a) PT2249A Series Code Bit C1 is internally pulled high and thereby set
at a default value of “ 1”. Thus, PT2248 Code Bit C1 must be set at “1”.
b) PT2249A Series Code Bits C2 and C3 may be programmed as follows:
1) “ 0”, “0” (This combination is not available with TC9149.)
2) “0”, “1”
3) “1”, “0”
4) “1”, “1”
c) To set Code Bit to “1” on PT2248, diodes must be connected to Code
Terminal from the T1 ~ T 3 terminals.
d) To set Code Bit to “0” on PT2248, the terminals must be kept floating,
except C1 - add one diode.
e) The Code Bits Combinations of PT2248 and PT2249A Series are shown
below:
PT2248 PT2249A Series
C1 C2 C3 C2 C3
10000
10101
11010
11111
f) Exam ple : (Refer to Example 1 diagram)
The following example shows the case when PT2248 Code Bits C1 = 1,
C2 = 1, and C3 = 0. The CODE2 Pin of the PT2249A Series is
programmed in floating state and CODE3 pin is connected to Vss (C2 = 1,
Princeton Technology Corp. Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Receiver PT2249A / PT2250A Series
PT2249A/50A v 2.3 Page 5 Revised Dec. 1999
C3 = 0. ) In this way, the PT2249A Series can match the C2, C3 Code Bits
of PT2248 and correctly decode the remote commands.
CODE T3 T2 T1 K6
PT2248
C3=0
C2=1
C1=1
CODE3 CODE2 OSC Vcc
PT224 9A Series
C3=0
C2=1
Example 1
Circuit Diagram when Code Bit C2 = 1 and C3 = 0
2. Combination of PT2248/PT2250A Series Code Bits
a) PT2250A Series Code Bit C3 is internally pulled high and thereby set at
a default value of “ 1”. Thus, PT2248 Code Bit C3 must be set at “1”.
b) PT2250A Series Code Bits C2 and C3 may be programmed as follows:
1) “ 0”, “0” (This combination is not available with TC9150.)
2) “0”, “1”
3) “1”, “0”
4) “1”, “1”
c) To set Code Bit to “1” on PT2248, diodes must be connected to Code
Terminal from the T1 ~ T 3 terminals.
d) To set Code Bit to “0” on PT2248, the terminals must be kept floating.
Princeton Technology Corp. Tel: 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Receiver PT2249A / PT2250A Series
PT2249A/50A v 2.3 Page 6 Revised Dec. 1999
e) The Code Bits Combinations of PT2248 and PT2250A Series are shown
below:
PT2248 PT2250A Series
C1 C2 C3 C1 C2
001 0 0
011 0 1
101 1 0
111 1 1
f) Exam ple : (Refer to Example 2 diagram)
The following example shows the case when PT2248 Code Bits C1 = 0,
C2 = 0, and C3 = 1. The CODE1 and CODE2 pins of the PT2250A Series
are connected to the Vss (C1=0 and C2=0). In this w a y, the PT2250A or
any of its series matches the C1 and C2 Code Bits of PT2248; thus, the
rem ote commands are correctly decoded.
CODE T3 T2 T1 K6
C1=0 C2=0
PT2248
CODE1 CODE2 OSC Vcc
PT22 50 A Se rie s
+5V
C1=0 C2=0
Example 2
Circuit Diagram when Code Bit C1= 0 and C2 = 0
