15
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - MULTI-THROW - SMT
15 - 1
HMC344LP3 / 344LP3E
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
v06.1210
General Description
Features
Functional Diagram
The HMC344LP3 & HMC344LP3E are broadband
non-reective 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 and extends the frequency coverage
of Hittite’s SP4T switch product line. This switch also
includes an on board binary decoder circuit which
reduces the required logic control lines to two. The
switch operates using a negative control voltage of
0/-5V, and requires a xed bias of -5V.
Broadband Performance: DC - 8 GHz
High Isolation: 40 dB@ 6 GHz
Low Insertion Loss: 1.8 dB@ 6 GHz
Integrated 2:4 TTL Decoder
16 Lead 3x3mm QFN Package: 9 mm
Electrical Specications, 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
Parameter Frequency Min. Typ. Max. Units
Insertion Loss
DC - 2.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
1.6
1.8
2.1
2.0
2.2
2.5
dB
dB
dB
Isolation
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
43
36
34
31
48
41
40
36
dB
dB
dB
dB
Return Loss “On State”
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
12
9
8
5
15
12
11
8
dB
dB
dB
dB
Return Loss “Off State” DC - 8.0 GHz 7 10 dB
Input Power for 1 dB Compression 0.5 - 8.0 GHz 17 21 dBm
Input Third Order Intercept
(Two-Tone Input Power = +7 dBm Each Tone) 0.5 - 8.0 GHz 37 40 dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
DC - 8.0 GHz 35
150
ns
ns
15
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - MULTI-THROW - SMT
15 - 2
HMC344LP3 / 344LP3E
Input Third Order Intercept Point
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
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.
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Bias Voltage & Current
Control Voltages
State Bias Condition
Low -3V to 0 Vdc @ 60 µA Typical
High -5 to -4.2 Vdc @ 5 µA Typical
Vee Range = -5.0 Vdc ± 10%
Vee
(Vdc)
Iee (Typ.)
(mA)
Iee (Max.)
(mA)
-5.0 3.0 6.0
-5
-4
-3
-2
-1
0
0 1 2 3 4 5 6 7 8 9
+25 C
+85 C
-40 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
35
37
39
41
43
45
123456789
RF1
RF2
RF3
RF4
INPUT THIRD ORDER INTERCEPT (dBm)
FREQUENCY (GHz)
10
13
16
19
22
25
2 3 4 5 6 7 8 9
1.0dB Compression Point
0.1dB Compression Point
INPUT COMPRESSION POINT (dBm)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
0 1 2 3 4 5 6 7 8 9
RFC
RF1,2,3,4 On
RF1,2,3,4 Off
RETURN LOSS (dB)
FREQUENCY (GHz)
-70
-60
-50
-40
-30
-20
-10
0
0 1 2 3 4 5 6 7 8 9 10
RF1
RF2
RF3
RF4
ISOLATION (dB)
FREQUENCY (GHz)
15
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - MULTI-THROW - SMT
15 - 3
Truth Table
Outline Drawing
Control Input Signal Path State
A B RFCOM to:
High High RF1
Low High RF2
High Low RF3
Low Low RF4
Absolute Maximum Ratings
Bias Voltage Range (Vee) -7.0 Vdc
Control Voltage Range (A & B) Vee -0.5V to +1.0 Vdc
Channel Temperature 150 °C
Thermal Resistance
(Insertion Loss Path) 143 °C/W
Thermal Resistance
(Terminated Path) 1,030 °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
HMC344LP3 / 344LP3E
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
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Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC344LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 344
XXXX
HMC344LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 344
XXXX
[1] Max peak reow temperature of 235 °C
[2] Max peak reow temperature of 260 °C
[3] 4-Digit lot number XXXX
Package Information
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 PCB LAND
PATTERN.
15
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - MULTI-THROW - SMT
15 - 4
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 if RF line potential is not equal to 0V.
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 VEE Supply Voltage -5V ± 10%
7 CTLB See truth table and control voltage table.
8 CTLA See truth table and control voltage table.
Pin Descriptions
HMC344LP3 / 344LP3E
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
v06.1210
15
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - MULTI-THROW - SMT
15 - 5
TTL Interface Circuit
HMC344LP3 / 344LP3E
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
v06.1210
15
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - MULTI-THROW - SMT
15 - 6
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.
List of Materials for Evaluation PCB 105311 [1]
Item Description
J1 - J7 PCB Mount SMA RF Connector
J8 - J11 DC Pin
C1 - C7 0 ohm res, 0402 Pkg. [3]
C8 10k pF Capacitor, 0603 Pkg.
U1 HMC344LP3 / HMC344LP3E
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
[3] Select and replace with a suitable capacitor value for applicable
operating frequency range.
HMC344LP3 / 344LP3E
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
v06.1210
