Datasheet

AISG Integrated Transceiver
MAX9947
14 _____________________________________________________________________________________
Typical Application Circuit (Connectivity at the Tower)
Chip Information
PROCESS: BiCMOS
MAX9947
MAX13486E
MAX13485E
BANDPASS FILTER
RXIN
SYNCOUT
Tx POWER:
+1dBm TO
+6dBm
TXOUT
50I
COAX
CABLE
AC-
COUPLING
1.5V
REF
-15dBm
BANDPASS FILTER
+7dBm TO +12dBm
RES
BIAS
OOK
DEMODULATOR
DIRECTION
DETECTION
STATE MACHINE
ANALOG
SWITCH
POWER
SUPPLY
GND
DI
DE
RO
GND
B
A
RXOUT
DIR
5V
12V
3.3V
0.1FF 0.1FF
1FF
R2
R1
5.0V
8.704MHz
DIRMD2
RS-485 BUS
TO TMA/RET
DIRMD1
TXIN
XTAL2
XTAL1
V
CC
V
CC
V
L
RE
C
F
= 470pF