Datasheet

AISG Integrated Transceiver
MAX9947
_______________________________________________________________________________________ 9
Pin Description
Pin Configuration
PIN NAME FUNCTION
1 SYNCOUT Sync Output. Open-drain output that outputs the 8.704MHz clock to synchronize other devices.
2 TXIN Digital Signal Input
3 V
L
Logic Supply Voltage
4 RXOUT Digital Signal Output
5 DIR Direction Output. DIR is asserted high when the data stream is seen at the receiver (RXIN).
6 DIRMD2 Duration Mode Select Input 2
7 DIRMD1 Duration Mode Select Input 1
8, 16 GND Ground
9 RES External Resistors’ Connection to Set the Output Power Level
10 BIAS
Output Bias Reference. Used with RES to set the output power level. Decouple BIAS with 1FF to GND.
11 RXIN OOK-Modulated Input Signal
12 TXOUT OOK-Modulated Output Signal
13 V
CC
Analog Supply Voltage
14 XTAL1
External Crystal Input Terminal. Feed with 8.704MHz (Q30ppm) input clock for external synchronization.
15 XTAL2 External Crystal Input Terminal. Connect to GND for external synchronization.
— EP Exposed Pad. Connect EP to GND to enhance thermal dissipation.
15
16
14
13
6
5
7
TXIN
RXOUT
8
SYNCOUT
RXIN RES TXOUT
1 2
XTAL1
4
12 11 9
XTAL2
GND
+
EP*
GND
DIRMD2
DIRMD1
THIN QFN
(3mm x 3mm)
*EP = EXPOSED PAD. CONNECT EP TO GND TO ENHANCE THERMAL DISSIPATION.
DIR
MAX9947
V
L
BIAS
3
10
V
CC
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