7 - 26
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Web Site: www.hittite.com
M I C R O W A V E C O R P O R A T I O N
F
EBRUARY
2001
'99
new!
S
WITCHES
7
SP6T
SMT
Features
GaAS MMIC SP6T SWITCH DC TO 2.5 GHz
LOW INSERTION LOSS (1 GHz): 0.6dB
INTEGRATED 3:6 DECODER
24 LEAD QSOP PACKAGE
General Description
The HMC172QS24 is a low-cost SP6T switch in
a 24-lead QSOP package for use in antenna
diversity, switched filter banks, gain/attenuation
selection, and general channel multiplexing ap-
plications. The switch can control signals up to
2.5 GHz and is especially suited for 800-1000
MHz and 1700-2000 MHz basestation applica-
tions. A 3:6 decoder is integrated on the switch,
requiring only 3 control lines and a negative bias
to select each RF path. The 3:6 decoder re-
places 12 control lines normally required by
GaAS SP6T switches. Switch outputs are
reflective shorts when "off". The QSOP24 pack-
age occupies the same area as a 14-lead SOIC.
See positive bias/TTL SP6T version
HMC252QS24.
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Guaranteed Performance
For 0/-5V Control and Vee = -5V in a 50 Ohm system, -40 to +85 deg C
HMC172QS24
V
01.0101
7 - 27
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Web Site: www.hittite.com
M I C R O W A V E C O R P O R A T I O N
F
EBRUARY
2001
'99
new!
7
S
WITCHES
SP6T
SMT
-40
-35
-30
-25
-20
-15
-10
-5
0
0
1
2
3
RET
URN
L
O
SS
(
d
B)
FREQUENCY (GHz)
S11 RFC
S22
HMC172QS24 SP6T SWITCH DC TO 2.5 GHz
-3
-2.5
-2
-1.5
-1
-0.5
0
0
1
2
3
I
N
SERTI
O
N
L
O
SS
(
d
B)
FREQUENCY (GHz)
-60
-50
-40
-30
-20
-10
0
0
1
2
3
IS
OLA
T
ION
(
dB
)
FREQUENCY (GHz)
Insertion Loss
Isolation
Return Loss
-60
-50
-40
-30
-20
0
1
2
3
IS
OLA
T
ION
(
dB
)
FREQUENCY (GHz)
RF1-2
RF4-5
RF6-5
RF3-2
RF2-3
RF5-4
Isolation Between Several RF I / Os
HMC172QS24
V
01.0101
7 - 28
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Web Site: www.hittite.com
M I C R O W A V E C O R P O R A T I O N
F
EBRUARY
2001
'99
new!
S
WITCHES
7
SP6T
SMT
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Absolute Maximum Ratings
Truth Table
Control Voltages
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HMC172QS24 SP6T SWITCH DC TO 2.5 GHz
Functional Diagram
HMC172QS24
V
01.0101
7 - 29
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Web Site: www.hittite.com
M I C R O W A V E C O R P O R A T I O N
F
EBRUARY
2001
'99
new!
7
S
WITCHES
SP6T
SMT
XXXXX
YYWW
PIN 1
CTL B
CTL A
(0.64)
TYP
(0.23/0.36)
0.058/0.068
(1.47/1.73)
(0.10/0.25)
O/C O/C GND GND RF1 GND RF2 GND RF3 GND
GND RFC GND GND RF6 GND RF5 GND RF4 GND VEE
CTL C
(8.53/8.74)
(BOTTOM VIEW)
(0.381 X45 DEG)
0.228/0.244
0.150/0.157
(3.81/3.99)
(5.79/6.20)
PIN 1 (REF)
0.015 X45 DEG
0.336/0.344
0.009/0.014
0.025
0.004/0.010
0.015
(0.38)
MIN
0.008/0.013
(0.20/0.33)
0/8 DEG
DATE CODE
TYP
LOT NUMBER
YY= YEAR
WW= WEEK
HMC172
Vcc
Vee
-5 VDC
10K
Ohm
To A
TTL Control A
74HCT04 (1/6)
5.1V
Zener
74HCT04 (1/6)
TTL Control C
Vee
-5 VDC
10K
Ohm
Vcc
To C
5.1V
Zener
74HCT04 (1/6)
TTL Control B
Vee
-5 VDC
10K
Ohm
Vcc
To B
5.1V
Zener
Outline
TTL Interface Circuit
Note:
Control inputs A, B and C can be driven directly with TTL
logic with -5 Volts applied to the HCT logic gate Vee and to pin 11 (Vee) of the RF switch.
HMC172QS24 SP6T SWITCH DC TO 2.5 GHz
1)
MATERIAL:
A) PACKAGE BODY: LOW STRESS INJECTION MOLDED PLASTIC, SILICA & SILICONE IMPREGNATED
B) LEADFRAME MATERIAL: COPPER ALLOY
2 .
PLATING: LEAD-TIN SOLDER PLATE
3.
DIMENSIONS ARE IN INCHES (MILLIMETERS) UNLESS OTHERWISE SPECIFIED TOL. ARE 0.005(0.13)
HMC172QS24
V
01.0101
PDF 
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