MICROWAVE CORPORATION
14 - 142
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
SWITCHES - SMT
14
HMC253QS24
GaAs MMIC SP8T NON-REFLECTIVE
SWITCH, DC - 2.5 GHz
v03.0701
General Description
Features
Functional Diagram
Low Insertion Loss (2 GHz): 1.3dB
Single Positive Supply: Vdd = +5V
Integrated 3:8 TTL Decoder
24 Lead QSOP Package
Electrical Specifi cations,
T
A
= +25 C, For TTL Control and Vdd = +5V in a 50 Ohm system
Typical Applications
The HMC253QS24 is ideal for
DC - 2.5 GHz applications:
CATV/DBS
CDMA
Cellular/PCS
The HMC253QS24 is a low-cost non-refl ective
SP8T switch in a 24-lead QSOP package featur-
ing wideband operation from DC to 2.5 GHz.
The switch offers a single positive bias and true
TTL/CMOS compatibility. A 3:8 decoder is inte-
grated on the switch requiring only 3 control lines
and a positive bias to select each path. The
HMC253QS24 SP8T will replace multiple confi g-
urations of SP4T and SPDT MMIC switches.
Parameter
Frequency
Min.
Typ.
Max.
Units
Insertion Loss
DC - 1.0 GHz
DC - 2.0 GHz
DC - 2.5 GHz
1.1
1.3
1.8
1.5
1.7
2.4
dB
dB
dB
Isolation
DC - 1.0 GHz
DC - 2.0 GHz
DC - 2.5 GHz
32
26
24
36
30
28
dB
dB
dB
Return Loss
"On State"
DC - 1.0 GHz
DC - 2.0 GHz
DC - 2.5 GHz
14
9
6
18
12
8
dB
dB
dB
Return Loss (RF1-8)
"Off State"
0.3 - 2.5 GHz
0.5 - 2.5 GHz
7
10
10
13
dB
dB
Input Power for 1 dB Compression
0.3 - 2.5 GHz
20
23
dBm
Input Third Order Intercept
(Two-Tone Input Power = +7 dBm Each Tone)
0.3 - 2.5 GHz
40
43
dBm
Switching Characteristics
0.3 - 2.5 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
30
100
ns
ns
MICROWAVE CORPORATION
14 - 143
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
14
SWITCHES - SMT
-3
-2.5
-2
-1.5
-1
-0.5
0
0
1
2
3
INSERTION LOSS (dB)
FREQUENCY (GHz)
+85 C
-40 C
+25 C
-30
-25
-20
-15
-10
-5
0
0
1
2
3
RETURN LOSS (dB)
FREQUENCY (GHz)
RF1-6 On
RF1-6 Off
RFC
GaAs MMIC SUB-HARMONICALLY PUMPED MIXER 17 - 25 GHz
HMC253QS24
Return Loss
Insertion Loss
Isolation
v03.0701
GaAs MMIC SP8T NON-REFLECTIVE
SWITCH, DC - 2.5 GHz
-70
-60
-50
-40
-30
-20
-10
0
0
1
2
3
ISOLATION (dB)
FREQUENCY (GHz)
RF6, RF3
RF1, RF2, RF4, RF5, RF7, RF8
TTL/CMOS Control Voltages
Bias Voltage & Current
Vdd Range = +5.0 Vdc 10%
Vdd
(Vdc)
Idd (Typ.)
(mA)
Idd (Max.)
(mA)
+5.0
6.0
9.0
State
Bias Condition
Low
0 to +0.8 Vdc @ 5 uA Typ.
High
+2.0 to +5.0 Vdc @ 70 uA Typ.
Truth Table
Control Input
Signal Path State
A
B
C
RFCOM to:
Low
Low
Low
RF1
High
Low
Low
RF2
Low
High
Low
RF3
High
High
Low
RF4
Low
Low
High
RF5
High
Low
High
RF6
Low
High
High
RF7
High
High
High
RF8
MICROWAVE CORPORATION
14 - 144
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
SWITCHES - SMT
14
v03.0701
HMC253QS24
GaAs MMIC SP8T NON-REFLECTIVE
SWITCH, DC - 2.5 GHz
Absolute Maximum Ratings
NOTE:
DC Blocking capacitors are required at ports RFC and RF1,
2, 3, 4, 5, 6, 7, 8.
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED
PLASTIC SILICA AND SILICON IMPREGNATED.
2. LEADFRAME MATERIAL: COPPER ALLOY
3. LEADFRAME PLATING: Sn/Pb SOLDER
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
6. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
7. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND.
Bias Voltage Range (Port Vdd)
+7.0 Vdc
Control Voltage Range (A, B, C)
-0.5V to Vdd +1Vdc
Storage Temperature
-65 to +150 C
Operating Temperature
-40 to +85 C
Maximum Input Power
Vdd = +5V
+20 dBm (0.05 - 0.5 GHz)
+24 dBm (0.5 - 2.5 GHz)
MICROWAVE CORPORATION
14 - 145
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
14
SWITCHES - SMT
v03.0701
HMC253QS24
GaAs MMIC SP8T NON-REFLECTIVE
SWITCH, DC - 2.5 GHz
Evaluation Circuit Board
The circuit board used in the fi nal application should be generated with proper RF circuit design techniques. Signal
lines at the RF ports should have 50 ohm impedance while the package ground leads should be connected directly to
the ground plane similar to that shown above. A suffi cient number of VIA holes should be used to connect the top and
bottom ground planes. The evaluation circuit board shown above is available from Hittite Microwave Corporation upon
request.
List of Material
Item
Description
J1 - J9
PC Mount SMA Connector
J10 - J14
DC Pin
C1 - C9
100 pF Capacitor, 0402 Pkg.
C10
0.01 uF Capacitor, 0603 Pkg.
U1
HMC253QS24 SP8T Switch
PCB*
103704 Eval Board
* Circuit Board Material: Rogers 4350
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