SWITCHES - SMT
10
10 - 208
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC345LP3 / 345LP3E
GaAs MMIC SP4T NON-REFLECTIVE
POSITIVE CONTROL SWITCH, DC* - 8 GHz
v04.0805
General Description
Features
Functional Diagram
The HMC345LP3 & HMC345LP3E are broadband
non-re ective GaAs MESFET SP4T switches in low
cost leadless surface mount packages. Covering DC
to 8 GHz, this switch offers high isolation and low
insertion loss. This switch also includes an on board
binary decoder circuit which reduces the required
logic control lines to two. The switch operates using a
positive control voltage of 0/+5V, and requires a xed
bias of +5V.
Broadband Performance: DC - 8 GHz
High Isolation: 35 dB@ 6 GHz
Low Insertion Loss: 2.2 dB@ 6 GHz
Integrated Positive Supply 2:4 TTL Decoder
3 x 3 mm SMT Package
Electrical Speci cations, TA = +25° C, With 0/+5V Control, 50 Ohm System
Typical Applications
This switch is suitable for usage in DC - 8.0 GHz 50-
Ohm or 75-Ohm systems:
• Broadband
• Fiber Optics
• Switched Filter Banks
• Wireless below 8 GHz
* Blocking capacitors are required at ports RFC and RF1,
2, 3, & 4. Their value will determine the lowest transmission
frequency.
Parameter Frequency Min. Typ. Max. Units
Insertion Loss
DC - 2.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
2.0
2.2
2.4
2.4
2.6
2.9
dB
dB
dB
Isolation
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
37
32
31
27
42
37
35
32
dB
dB
dB
dB
Return Loss “On State”
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
10
8
7
6
13
11
10
9
dB
dB
dB
dB
Return Loss (RF1 - RF4) “Off State” 2.0 - 8.0 GHz 6 10 dB
Input Power for 1 dB Compression 2.0 - 8.0 GHz 17 21 dBm
Input Third Order Intercept
(Two-Tone Input Power = +7 dBm Each Tone, 1MHz Tone Separation) 2.0 - 8.0 GHz 37 45 dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
DC - 8.0 GHz 50
120
ns
ns
SWITCHES - SMT
10
10 - 209
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Input Third Order Intercept Point
Return Loss 0.1 and 1 dB Input Compression Point
Insertion Loss vs. Temperature Isolation
* Isolation is recorded above insertion loss & measured at output of switch.
HMC345LP3 / 345LP3E
GaAs MMIC SP4T NON-REFLECTIVE
POSITIVE CONTROL SWITCH, DC* - 8 GHz
v04.0805
-5
-4
-3
-2
-1
0
0123456789
+25 C
-40 C
+85 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
30
35
40
45
50
55
60
12345678
RF1
RF2
RF3
RF4
INPUT THIRD ORDER INTERCEPT (dBm)
FREQUENCY (GHz)
10
13
16
19
22
25
12345678
0.1dB Compression Point
1.0dB Compression Point
INPUT COMPRESSION POINT (dBm)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
0123456789
RFC
RF1-RF4 ON
RF1-RF4 OFF
RETURN LOSS (dB)
FREQUENCY (GHz)
-70
-60
-50
-40
-30
-20
-10
0
0123456789
RF1
RF2
RF3
RF4
ISOLATION (dB)
FREQUENCY (GHz)
SWITCHES - SMT
10
10 - 210
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Truth Table
Bias Voltage & Current
Control Voltages
Absolute Maximum Ratings
Note: DC blocking capacitors are required at ports RFC
and RF1, 2, 3, & 4. Their value will determine the lowest
transmission frequency.
Control Input Signal Path State
A B RFCOM to:
Low Low RF1
High Low RF2
Low High RF3
High High RF4
Vdd Range = +5.0 Vdc ± 10%
Vdd
(Vdc)
Idd (Typ.)
(mA)
Idd (Max.)
(mA)
+5.0 3.0 6.0
State Bias Condition
Low 0 to +0.8 Vdc @ 5 uA Typical
High +2.0 to +5.0 Vdc @ 60 uA Typical
Bias Voltage Range (Vdd) +7.0 Vdc
Control Voltage Range
(A & B) -0.5V to Vdd +1.0 Vdc
Channel Temperature 150 °C
Thermal Resistance
(Insertion Loss Path) 143 °C/W
Thermal Resistance
(Terminated Path) 1030 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
Maximum Input Power +24 dBm
ESD Sensitivity (HBM) Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
HMC345LP3 / 345LP3E
GaAs MMIC SP4T NON-REFLECTIVE
POSITIVE CONTROL SWITCH, DC* - 8 GHz
v04.0805
SWITCHES - SMT
10
10 - 211
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Outline Drawing
HMC345LP3 / 345LP3E
GaAs MMIC SP4T NON-REFLECTIVE
POSITIVE CONTROL SWITCH, DC* - 8 GHz
v04.0805
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS]
3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE
SOLDERED TO PCB RF GROUND.
7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED
LAND PATTERN.
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC345LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 345
XXXX
HMC345LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 345
XXXX
[1] Max peak re ow temperature of 235 °C
[2] Max peak re ow temperature of 260 °C
[3] 4-Digit lot number XXXX
Package Information
SWITCHES - SMT
10
10 - 212
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Pin Number Function Description Interface Schematic
1, 4,
9, 12, 15
RF4, RF3,
RF2, RF1, RFC
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
2, 3,
10, 11, 13 N/C This pin should be connected to PCB RF
ground to maximize isolation.
5, 14, 16 GND Package bottom has exposed metal paddle that
must also be connected to PCB RF ground.
6 VDD Supply Voltage +5V ± 10%
7 CTLB See truth table and control voltage table.
8 CTLA See truth table and control voltage table.
Pin Descriptions
HMC345LP3 / 345LP3E
GaAs MMIC SP4T NON-REFLECTIVE
POSITIVE CONTROL SWITCH, DC* - 8 GHz
v04.0805
SWITCHES - SMT
10
10 - 213
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Evaluation PCB
The circuit board used in the nal application
should be generated with proper RF circuit design
techniques. Signal lines at the RF port should have
50 ohm impedance and the package ground leads
and backside ground slug should be connected
directly to the ground plane similar to that shown
above. The evaluation circuit board shown above is
available from Hittite Microwave Corporation upon
request.
Item Description
J1 - J7 PCB Mount SMA RF Connector
J8 - J11 DC Pin
C1 - C7 100 pF Capacitor, 0402 Pkg.
C8 10k pF Capacitor, 0603 Pkg.
U1 HMC345LP3 / HMC345LP3E
SP4T Switch
PCB [2] 104708 Evaluation PCB 1.29”x1.55”
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
HMC345LP3 / 345LP3E
GaAs MMIC SP4T NON-REFLECTIVE
POSITIVE CONTROL SWITCH, DC* - 8 GHz
v04.0805
List of Materials for Evaluation PCB 108333 [1]
