Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Transmitter
PT2248
BLOCK DIAGRAM
VS S
1
VCC
16
XT
/XT
2
OSC
3
DIi vi der
O u tput
Sy nthe si zi ng
Ci rc ui t
15
/TX OUT
K1
K2
K3
K4
K5
K6
4
De co der
5
6
7
8
9
K ey
In put
Ci rc ui t
Ti min g Si gna l
G e ner ati ng
Ci rc ui t
Hol d Si gna l
G e ner ato r
14
/TE ST
C ode B it
Si gna l
G e ner ati ng
Ci rc ui t
10
11
12
13
T1
T2
T3
CODE
PIN CONFIGURATION
VS S
XT
/XT
K1
K2
K3
K4
K5
1
2
3
4
5
6
7
8
PT2248
16
15
14
13
12
11
10
9
VCC
/TX OUT
/TE ST
CODE
T3
T2
T1
K6
PT2248 V2.7
-2-
June, 2005