TH72036
868/915MHz
FSK/ASK Transmitter
3 Pin Definition and Description
Pin No.
Name
I/O Type
Functional Schematic
Description
0: ENTX=1
1: ENTX=0
FSK data input,
CMOS compatible with in-
ternal pull-up circuit
1
FSKDTA
input
FSKDTA
1
1.5k
Ω
TX standby: no pull-up
TX active: pull-up
2
3
FSKSW
ROI
analog I/O
analog I/O
XOSC FSK pulling pin,
MOS switch
FSKSW
2
XOSC connection to XTAL,
Colpitts type crystal oscillator
25k
ROI
3
36p
36p
mode control input,
CMOS-compatible with in-
ternal pull-down circuit
4
5
6
7
8
EN
input
EN
4
1.5k
Ω
clock output,
CMOS-compatible
CKOUT
PSEL
CKDIV
OUT
output
analog I/O
input
CKOUT
5
400
Ω
power select input, high-
impedance comparator logic
8µA
PSEL
6
1.5k
Ω
TX standby: IPSEL = 0
TX active: IPSEL = 8µA
clock divider control input,
CMOS compatible with in-
ternal pull-down circuit
CKDIV
1.5k
Ω
7
TX standby: no pull-down
TX active: pull-down
0: ENTX=0
1: ENTX=1
VCC
OUT
8
output
power amplifier output,
open collector
VEE
VEE
9
VEE
VCC
ground
supply
negative power supply
positive power supply
10
3901072036
Rev. 005
Page 7 of 16
Data Sheet
June/07
MELEXIS [ Melexis Microelectronic Systems ]
