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For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
1
HMC344LC3
v03.0514
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
General Description
Features
Functional Diagram
The HMC344LC3 is a broadband non-reective GaAs
MESFET SP4T switch in a ceramic 3x3 mm leadless
surface mount package. Covering DC to 8 GHz, this
switch offers high isolation and low insertion loss. The
HMC344LC3 includes an integrated 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. Simple external level shifting circuitry allows this
switch to be controlled with most TTL/CMOS positive
logic families.
Broadband Performance: DC - 8 GHz
Integrated 2:4 TTL Decoder
High Isolation: 40 dB@ 6 GHz
Low Insertion Loss: 2 dB@ 6 GHz
Non-Reective Topology
Electrical Specications, TA = +25° C, With 0/-5V Control, 50 Ohm System
Typical Applications
The HMC344LC3 is ideal for:
• Broadband, Military, Radar & ECM
• Fiber Optics
• Switched Filter Banks
• Wireless below 8 GHz
• Test Instrumentation
Parameter Frequency Min. Typ. Max. Units
Insertion Loss
DC - 2.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
1.6
2.0
2.5
2.0
2.8
3.0
dB
dB
dB
Isolation
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
43
35
32
30
50
45
45
40
dB
dB
dB
dB
Return Loss “On State”
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
15
12
12
12
17
16
16
17
dB
dB
dB
dB
Return Loss “Off State” DC - 8.0 GHz 12 15 dB
Input Power for 0.1 dB Compression 0.5 - 8.0 GHz 22 26 dBm
Input Third Order Intercept
(Two-Tone Input Power = +7 dBm Each Tone) 0.5 - 8.0 GHz 43 dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
DC - 8.0 GHz 20
70
ns
ns
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
2
HMC344LC3
v03.0514
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
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.
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 (Ty p.)
(mA)
Iee (Max.)
(mA)
-5.0 3.0 6.0
-5
-4
-3
-2
-1
0
0123456789
+25 C
+85 C
-40 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
35
37
39
41
43
45
47
49
0123456789
RF1
RF2
RF3
RF4
iNPUT THIRD ORDER INTERCEPT (dBm)
FREQUENCY (GHz)
18
20
22
24
26
28
30
32
23456789
1.0 dB
0.1 dB
INPUT COMPRESSION POINT (dBm)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
0123456789
RFC
RF1,2,3,4 On
RF1,2,3,4 Off
RETURN LOSS (dB)
FREQUENCY (GHz)
-70
-60
-50
-40
-30
-20
-10
0
012345678910
RF1
RF2
RF3
RF4
ISOLATION (dB)
FREQUENCY (GHz)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
3
HMC344LC3
v03.0514
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
Truth Table
Outline Drawing
Control Input Signal Path State
A B RFC to:
High High RF1
Low High RF2
High Low RF3
Low Low RF4
Absolute Maximum Ratings
Bias Voltage Range (Vee) -7.0 Vd c
Control Voltage Range (A & B) Vee -0.5V to +1.0 Vdc
Channel Temperature 150 °C
Thermal Resistance
(Insertion Loss Path) 100 °C/W
Thermal Resistance
(Terminated Path) 180 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
Maximum Input Power
(Low Loss State) +28 dBm
ESD Sensitivity (HBM) Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
NOTES:
1. PACKAGE BODY MATERIAL: ALUMINA
2. LEAD AND GROUND PADDLE PLATING: 30-80 MICROINCHES GOLD
OVER 50 MICROINCHES MINIMUM NICKEL.
3. DIMENSIONS ARE IN INCHES [MILLIMETERS].
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm DATUM -C-
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO
PCB RF GROUND.
Package Information
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC344LC3 Alumina, White Gold over Nickel MSL3 [1] H344
XXXX
[1] Max peak reow temperature of 260 °C
[2] 4-Digit lot number XXXX
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
4
HMC344LC3
v03.0514
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
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, 5, 10, 11,
14, 16 GND Package bottom has exposed metal paddle that
must also be connected to PCB RF ground.
6Vee Supply Voltage -5V ± 10%
7CTLB See truth table and control voltage table.
8CTLA See truth table and control voltage table.
13 N/C This pin should be connected to PCB RF
ground to maximize isolation.
Pin Descriptions
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
5
HMC344LC3
v03.0514
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
TTL Interface Circuit
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
6
HMC344LC3
v03.0514
GaAs MMIC SP4T NON-REFLECTIVE
SWITCH, DC - 8 GHz
Evaluation PCB
The circuit board used in the application should
be generated with proper RF circuit design tech-
niques. 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 - C5 0Ω Resistor, 0402 Pkg.[3]
C6 1000 pF Capacitor, 0402 Pkg.
U1 HMC344LC3
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.
