TH71221 Datasheet, PDF (7/44 Pages) Melexis Microelectronic Systems – 27 to 930MHz FSK/FM/ASK Transceiver

TH71221
27 to 930MHz
FSK/FM/ASK Transceiver
Pin No. Name I/O Type
8 OUT_DTA output
9
VEE_RO ground
10
RO analog I/O
11 FSK_SW analog I/O
12
IN_DTA
input
13 ASK/FSK input
14 VCC_DIG supply
15 RE/SCLK input
16 TE/SDTA input
Functional Schematic
VCC
OUT_DTA
8
VEE
VCC
2.6µA
36p
RO
36p
10
39k
VEE
VCC
FSK_SW
11
VEE
VCC
IN_DTA
12
120
120k
VEE
VCC
ASK/FSK
13
120
VEE
RE/SCLK
15
TE/SDTA
16
VCC
120
120k
VEE
VCC
120
120k
VEE
Description
OA1 output, high impedance
in transmit and idle mode
ground of RO
RO input, base of bipolar
transistor
FSK pulling pin, switch to
ground or OPEN
The switch is open in re-
ceive and idle mode
ASK/FSK modulation data
input, pull down resistor
120kΩ
ASK/FSK mode select input
positive supply of serial port
and control logic
receiver enable input / clock
input for the shift register,
pull down resistor 120kΩ
transmitter enable input /
serial data input, pull down
resistor 120kΩ
39010 071221
Rev. 005
Page 7 of 44
Data Sheet
June/07