TH7107
315/433MHz
FSK/FM/ASK Transmitter
3 Pin Definition and Description
Pin No. Name
1 LF1
I/O Type
output
Functional Schematic
LF1
200Ω
1
Description
charge pump output, con-
nection to loop filter
2 SUB
3 DATA
ground
input
DATA
1.8k
3
negative power supply, sub-
strate connection
FSK data input,
CMOS-compatible
4 RO2
5 RO1
6 ENTX
analog I/O
RO2
4
analog I/O
RO1
5
37k
28p
28p
input
ENTX
1.1k
6
7 ENCK
input
ENCK
1.1k
7
XOSC FSK pulling pin,
MOS switch
XOSC connection to XTAL,
Colpitts type crystal oscilla-
tor
mode control input, CMOS-
compatible with internal pull-
down
mode control input, CMOS-
compatible with internal pull-
down
3901007107
Rev. 008
Page 5 of 16
Data Sheet
May/03