TH72012 Datasheet, PDF (7/20 Pages) Melexis Microelectronic Systems – 433MHz ASK Transmitter

3 Pin Definition and Description
Pin No. Name
1 ASKDTA
I/O Type
input
Functional Schematic
0: ENTX=1
1: ENTX=0
ASKDTA
1
1.5kΩ
2 n. c.
3 ROI
4 ENTX
analog I/O
input
25k
ROI
3
36p
36p
ENTX
4
1.5kΩ
TH72012
433MHz
ASK Transmitter
Description
ASK data input,
CMOS compatible with op-
eration mode dependent
pull-up circuit
TX standby: no pull-up
TX active: pull-up
no connection
XOSC connection to XTAL,
Colpitts type crystal oscilla-
tor
mode control input,
CMOS-compatible with in-
ternal pull-down circuit
5 PSEL
6 VCC
7 OUT
analog I/O
supply
output
PSEL
5
1.5kΩ
OUT
7
power select input, high-
impedance comparator logic
I _PSEL
TX standby: I_PSEL = 0
TX active: I_PSEL = 8µA
positive power supply
VCC
power amplifier output,
open collector
VEE
8
VEE
ground
VEE
negative power supply
39010 72012
Rev. 009
Page 7 of 20
Data Sheet
July/06