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Low Insertion Loss 0.3 dB Typ. @ 2.4 GHz
Moderate Isolation 21 dB @ 2.4 GHz
Low Power Consumption <5 碌A @ +2.3V
Low Cost Plastic SOT-363 Package
Functional Schematic
C=39pF
V1
RFC
V2
Description
M/A-COM鈥檚 SW -485 is a GaAs PHEMT MMIC SPDT
switch in a low cost SC-70 (SOT-363) surface mount plas-
tic package. The SW-485 is ideally suited for applications
where very small size and low cost are required. Typical
applications are dual band systems where switching b e-
tween small signal components is required such as filter
banks, single-band LNAs, converters, etc. This part can be
used for low power, low loss requirements in the all sys-
tems operating up to 3 GHz, including PCS, GSM, DCS,
Blue Tooth, and other Rx chain applications.
The SW -485 is fabricated using a 0.5 micron gate length
GaAs PHEMT process. The process features full passiv a-
tion for performance and reliability.
RF1
GND
RF2
PIN 1
C=39pF
C=39pF
Pin Configuration
Pin No.
1
2
3
4
5
6
Function
RF1
GND
RF2
V2
RFC
V1
Description
RF Port 1
Ground
RF Port 2
Control 2
RF Input
Control 1
Handling Procedures
The following precautions should be observed to avoid
damage:
Static Sensitivity
Gallium Arsenide Integrated Circuits are ESD sensitive and
can be damaged by static electricity. Proper ESD tech-
niques should be used when handling these devices.
Absolute Maximum Ratings
1
Parameter
Max Input Power (0.5 - 3.0 GHz)
3 V Control
5 V Control
Operating Voltage
Operating Temperature
Storage Temperature
+32 dBm
+34 dBm
+8.5 volts
-40 掳C to +85 掳C
-65 掳C to +150 掳C
Absolute
Maximum
Truth Table
Mode
(Control)
Positive
1
2
Control
V1
Control RFC- RF1 RFC-RF2
V2
On
Off
Off
On
0 卤 0.2V +2.3 to +5V
+2.3 to +5V 0 卤 0.2V
2. External DC blocking capacitors are required on all RF
ports.
1. Exceeding any one or combination of these limits may
cause permanent damage.
1
2
3
