TH7121 Datasheet, PDF (5/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
Pin No. Name I/O Type
9 VEE_RO ground
Functional Schematic
Description
ground of RO
10 RO
analog I/O
VCC
2.6µA
RO input, base of bipolar
transistor
40p
RO
40p
10
39k
VEE
11 FSK_SW analog I/O
VCC
FSK pulling pin, switch to
ground or OPEN
12
15
16
13
17
PRELIMINARY ^{IN_DTA input}
RE/SCLK input
TE/SDTA input
ASK/FSK input
FS0/SDEN input
FSK_SW
11
VEE
IN_DTA
12
RE/SCLK
15
16
TE/SDTA
VCC
120
120k
VEE
ASK/FSK
13
17
VCC
120
ASK/FSK modulation data
input, pull down resistor
120kΩ
receiver enable input / clock
input for the shift register,
pull down resistor 120kΩ
transmitter enable input /
serial data input, pull down
resistor 120kΩ
ASK/FSK mode select input
frequency select input / se-
FS0/SDEN
rial data enable input
VEE
14 VCC_DIG supply
positive supply of serial port
and control logic
18 VEE_DIG ground
ground of serial port and
control logic
19 FS1/LD input
VCC
FS1/LD
frequency select input / lock
detector output
19
120
20 VCC_PLL supply
22 VEE_PLL ground
VEE
positive supply of PLL fre-
quency synthesizer
ground of PLL frequency
synthesizer
3901007121
Rev. 001
Page 5 of 28
Data Sheet
Jan. 2002