9-11
Product Description
Ordering In formation
Typical Applications
Features
Functional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching® Applied
Si BJT GaAs MESFETGaAs HBT
Si Bi-CMOS SiGe HBT Si CMOS
InGaP/HBT GaN HEMT SiGe Bi-CMOS
RX OUT
GND
TX IN TX/RX
ANT I/O1
2
3 4
5
RF2436
TRANSMIT/RECEIVE SWITCH
• Cordless Phones
• Wireless Computer Per ipherals
• Wireless Security Systems
• General Purpose RF Switching
• Commercial and Consu mer Systems
The RF2436 is a very low-cost transmit/receive GaAs
MESFET switch. The device can handle power levels as
high as +28 dBm and spans a frequency range from DC
to 2500 MHz. The switch will operate from power supply
voltages as low as 1.5V and as high as 6V with a CMO S
logic driver for the control input. No negative voltage is
required, and current consumption is very low. VSWR for
the active channel (transmit or receive) is 1.1:1. The
device is housed in a very small industry-standard SOT
5-lead plastic package.
• Single Positive Power Supply
• Low Current Consumption
• 1dB Insertion Loss at 900MHz
• 24dB Crosstalk Isolation at 900MHz
• +27dBm Output P1dB
RF2436 Transmit/Receive Switch
RF2436 PCBA Fully Assembled Evaluation Board
0
Rev A4 030122
1
1.60
+ 0.01
0.400
2.80
+ 0.20
2.90
+ 0.10
0.45
+ 0.10
3° MAX
0° MIN 0.127
0.15
0.05
1.44
1.04
Dimensions in mm.
0.950
Package Style: SOT-5
!
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RF2436
Rev A4 030122
Absolute Maximum Ratings
Parameter Rating Unit
Supply Voltage 0 to +8.0 VDC
Control Voltage -1.0 to +6.0 V
Input RF Power +30 dBm
Operating Ambient Temperature -40 to +85 °C
Storage Temperature -40 to +150 °C
Parameter Specification Unit Condition
Min. Typ. Max.
Overall T=25°C, VDD=3.0V, Freq=900MHz
Frequency Range DC to 2500 MHz
Insertion Loss 1 2 dB Transmit or rec ei ve mode.
Isolation 20 22 dB Receive mode; ANT I/O to TX IN crosstalk
20 24 dB Transmit mode; ANT I/O to RXOUT crosstalk
RX OUT VSWR 1.1:1 Receive mode.
TX IN VSWR 1.1:1 Transmit mode.
Output P1dB +27 dBm
Output IP3 +39 dBm
Control Logic
CTRL Logic “Low” Voltage 0 V Receive mode.
CTRL Logic “High” Voltage 0.7 V Transmit mode.
Power Supply
Voltage 3 V Specifications
1.5 to 6 V Operating Limits
Current 5 10 µA Receive mode.
0.5 1 mA Transmit mode.
Caution! ESD sensitive device.
RF Micro Device s believ es the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).
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RF2436
Rev A4 030122
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
Pin Function Description Interface Schematic
1RX OUT
Output pin for Receive mode. VSWR is 1.1:1 when Receive mode is
selected and highly capacitive when Transmit mode is selected.
2GND
Ground connection. For best performance, k eep traces physically short
and connect immediately to the ground plane.
3TX IN
Input pin for Transmit mode. The input VSWR is 1.1:1 when Transmit
mode is selected and highly capacitive when Receive mode is
selected.
4TX/RX
Transmit Mode/Receive Mode control pin. A “low” level chooses
Receive mode; a “high” lev el chooses Transmit mode. CMOS logic may
be used to drive the control i nput.
5 ANT I/O Input/Output pin from/to antenna and power supply pin. This pin must
be biased with VDD through a resistor.
2436400-
1
2
3
5
4
C1
1 nF
C2
1 nF
C3
1 nF 50 Ω µstrip
TX/RX
J3
ANT I/O
VDD
R1
2 kΩ
50 Ω µstrip
50 Ω µstrip
J1
RX OUT
J2
TX IN
P1-3 TX/RX
GND
P1-1 C4
1 µF
+VDD
P1
1
2
3
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RF2436
Rev A4 030122
Evaluation Board Layout
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RF2436
Rev A4 030122
ANT to RX OUT, TX IN Terminated
Frequency Response= 100MHz-3000MHz, Temp=-40°C/25°C/85°C,
Input Power= -30dBm, VCC=3V,
-34.5
-34.0
-33.5
-33.0
-32.5
-32.0
-31.5
-31.0
-30.5
0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 3500.0
Fr equency (MHz)
Output Amplitude (dBm)
+85c
+25c
-40c
+
Output V ariation wi th Term inati o n of Un used Port
Freq u en cy Resp o nse=900MHz -250 0M Hz , T em p =25°C,
Input Power= -30dBm, V CC=3V
-33.0
-32.8
-32.6
-32.4
-32.2
-32.0
-31.8
-31.6
-31.4
0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0
Fr equency (MHz)
Output Amplitude (dBm)
Unused Port
Terminated
Unused Port
Un-terminated
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RF2436
Rev A4 030122
