The circuit has 10 functions ombining with BL9149 while it has 18 functions combining with BL9150.And total 75 commands can be transmitted: 63 commands by continuous keys, as multiple ke
Trang 1Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233
BL9148 General infrared Ray Remote Control Transmitter
Description
The BL9148 is CMOS LSI developed for use n the general infrared ray remote control transmitter The circuit has 10 functions ombining with BL9149 while it has 18 functions combining with BL9150.And total
75 commands can be transmitted: 63 commands by continuous keys, as multiple keying is possible, and 12 commands by single-shot keys
Pin Assignment
XT
3
K K
K5
4
K
K
2 1
XT GND
DIP 16 PIN
14 3
13 12 11 9 10
6 7 8
4 5
K2
K
K
0 1
K3
16 15 2
1
TX
DD
V
OUT
TEST Code
Features
● Wide range of operating supply voltage
(VDD=2.2~5.5V)
● CMOS structure assures extremely low
power dissipation
● Multiple Keying is possible
● Less external parts
● Adaptable to other models as code bits are available
● An oscillator can be constructed only by connecting an LC or ceramic resonator
Applications
Use as remote control transmitters in audios, air conditioners, toys and others
Trang 2Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233
BL9148 General infrared Ray Remote Control Transmitter
Application Circuit
9 10 11 12
GND XTXT K K1 K2 K3 K4 5
DD
V TXOUT TEST Code K K3 K2 K1 0
BL9148
5 11
12 6
16 10 4
15
3 9 14 8 2
13
1 7 T1~T3
K1~K6
KEY MATRIX
XOUT T1
V =3VDD
47µF
2SA1015
10
TLN105