Princeton Technology Corp.
Infrared Remote Control Receiver
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2249A / PT2250A Series
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 types of
machines and apparatus
Digital Filtering and Code Checking prevent interference from light
sources such as PL Lamp without sacrificing the receiving sensitivity
!
!
!
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Applications
!
!
!
Audio Equipment Remote Control
Television (TV) Remote Control
Video Cassette Recorder (VCR) Remote Control
PT2249A/50A v 2.3
Page 1
Revised Dec. 1999
Princeton Technology Corp.
Infrared Remote Control Receiver
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2249A / PT2250A Series
Pin Configurations
V
SS
RXIN
HP1
HP2
HP3
HP4
HP5
SP5
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
OSC
CODE2
CODE3
SP1
SP2
SP3
SP4
V
SS
RXIN
HP1
HP2
HP3
HP4
HP5
CP2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
OSC
CODE2
CODE3
SP1
SP2
SP3
CP1
(16 PDIP 300 mil)
(16 PDIP 300 mil)
PT2249A
PT2249AI / PT2249AIN
PT2249AL / PT2249ALN
PT2249AH / PT2249AHN
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
OSC
CODE1
CODE2
SP1
SP2
SP3
SP4
SP5
SP6
SP7
SP8
V
SS
RXIN
HP1
HP2
HP3
HP4
HP5
HP6
CP2
CP1
SP10
SP9
1
2
3
4
5
6
7
8
9
10
11
12
(24 PDIP 600 mil)
PT2250A /PT2250AN
PT2250AL / PT2250ALN
A
-
N
-
I
-
L
-
H
-
A d vanced Version
Inv ersed R X IN Input
In dependent C yclic (Toggle) O utputs
A d vanced D epend en t C y clic (Tog gle) O utp uts)
O u tpu t Fo rm at sam e as "L", except that
w h en H P 1 or H P2 is active, it w ill clear C P 1.
PT2249A/50A v 2.3
Page 2
Revised Dec. 1999
Princeton Technology Corp.
Infrared Remote Control Receiver
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2249A / PT2250A Series
Application Circuit
Vcc
CONTROL
SIGNAL
OUTPUT
1000pF
39K
PT2249A
CONTROL
SIGNAL
OUTPUT
RX
INPUT
Vcc
CONTROL SIGNAL OUTPUT
1000pF
39K
PT2250A
CONTROL SIGNAL OUTPUT
RX
INPUT
PT2249A/50A v 2.3
Page 3
Revised Dec. 1999
Princeton Technology Corp.
Infrared Remote Control Receiver
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2249A / PT2250A Series
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)
2)
3)
4)
“0”, “0” (This combination is not available with TC9149.)
“0”, “1”
“1”, “0”
“1”, “1”
c) To set Code Bit to “1” on PT2248, diodes must be connected to Code
Terminal from the T1 ~ T3 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
C2
C3
0
0
0
1
1
0
1
1
PT2249A Series
C2
C3
0
0
0
1
1
0
1
1
C1
1
1
1
1
f) Example : (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,
PT2249A/50A v 2.3
Page 4
Revised Dec. 1999
Princeton Technology Corp.
Infrared Remote Control Receiver
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2249A / PT2250A Series
C3 = 0. ) In this way, the PT2249A Series can match the C2, C3 Code Bits
of PT2248 and correctly decode the remote commands.
PT2248
CODE
T3
T2
T1
K6
C3=0
PT2249A Series
CODE3 CODE2 OSC
Vcc
C2=1
C2=1
C3=0
C1=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)
2)
3)
4)
“0”, “0” (This combination is not available with TC9150.)
“0”, “1”
“1”, “0”
“1”, “1”
c) To set Code Bit to “1” on PT2248, diodes must be connected to Code
Terminal from the T1 ~ T3 terminals.
d) To set Code Bit to “0” on PT2248, the terminals must be kept floating.
PT2249A/50A v 2.3
Page 5
Revised Dec. 1999
