Preliminary
8-38
RF3404
Rev A1 010918
8
Pin
Function
Description
Interface Schematic
1PCS LO
OUT
PCS LO output. Internal DC block.
2CELL LO
OUT
Cellular LO output. Internal DC block.
3GND
Low-inductance ground required.
4
MIXER
GAIN
Logic input. Controls switch around mixer preamp. High selects maxi-
mum mixer gain.
5GND
Low-inductance ground required.
6GND
Low-inductance ground required.
7GND
Low-inductance ground required.
8
VCC2
PCS LNA VCC. External bypass capacitor between 10pF and 47nF
required.
9GND
Low-inductance ground required.
10
GND
Low-inductance ground required.
11
CELL LNA
IN
Cellular LNA input. Internally matched to 50
Ω. DC-blocking internal to
module.
12
PCS LNA IN PCS LNA input. Internally matched to 50Ω. DC-blocking internal to
module.
13
GND
Low-inductance ground required.
14
GND
Low-inductance ground required.
15
GND
Low-inductance ground required.
16
VCC1
Cellular LNA VCC. External bypass may be required.
17
GND
Low-inductance ground required.
18
GND
Low-inductance ground required.
19
GND
Low-inductance ground required.
20
GND
Low-inductance ground required.
21
GND
Low-inductance ground required.
22
CDMA IF+
CDMA IF output. Open collector. “Current combiner” IF interface to
SAW filter recommended.
23
CDMA IF-
CDMA IF output. Open collector. “Current combiner” IF interface to
SAW filter recommended.
See pin 22.
MIX GAIN
CELL LNA IN
V
CC
PCS LNA IN
V
CC
CDMA+
CDMA-
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