TH71111
868/915MHz
FSK/FM/ASK Receiver
Pin No.
Name
RSSI
I/O Type
Functional Schematic
Description
21
analog
output
RSSI output, for RSSI and
ASK detection, approx.
36kΩ output impedance
I (Pi)
RSSI
50Ω
21
36k
22
23
VEE_BIAS ground
ground of general
bias system and OA
OUTP
OUTN
analog
output
FSK/FM positive output,
output impedance of
100kΩ to 300kΩ
OUTP
OUTN
50Ω
24
analog
output
FSK/FM negative output,
output impedance of
100kΩ to 300kΩ
23
24
20µA
20µA
25
26
VEE_RO
RO
ground
ground of DIV, PFD, RO
and charge pump
analog
input
RO input, Colpitts type
oscillator with internal feed-
back capacitors
50k
RO
26
30p
30p
27
28
VCC_PLL
ENRX
supply
positive supply of DIV, PFD,
RO and charge pump
digital
input
mode control input,
CMOS-compatible with
internal pull-down circuit
ENRX
28
1.5k
29
LF
analog I/O
charge pump output and
VCO1 control input
LF
29
200Ω
400Ω
4p
30
32
VEE_LNA
VCC_LNA
ground
supply
ground of LNA biasing
positive supply of
LNA biasing
39010 71111
Rev. 013
Page 8 of 22
Data Sheet
June/07
MELEXIS [ Melexis Microelectronic Systems ]
