DATA SHEET
SMS3925-079, SMS3925-079LF: Low Capacitance,
High-Voltage Schottky Diode
Features
G
G
G
G
G
Silicon Schottky diode for detector applications
Ultrasmall SC-79 package
Designed for high-volume, low-cost applications
Available in tape and reel packaging
Available lead (Pb)-free and RoHS-compliant MSL-1 @ 260 °C
per JEDEC J-STD-020
Absolute Maximum Ratings
Characteristic
Reverse voltage (V
R
)
Forward current - 1 ms pulse (I
F
)
Forward current - steady state (I
F
)
Power dissipation (P
D
)
Storage temperature (T
ST
)
Operating temperature (T
OP
)
Junction temperature (T
J
)
Electrostatic Discharge (ESD)
Human Body Model (HBM)
Value
40 V
1A
50 mA
250 mW
-65 °C to +150 °C
-65 °C to +150 °C
150 °C
Class 0
Description
The SMS3925-079 is a 40 V, 0.6 pF RF Schottky diode designed
for use as a level detector in wireless handsets and for general-
purpose switching applications. The SMS3925-079 is packaged
in the surface mount miniature SC-79 package and is designated
for low-cost, high-volume applications.
NEW
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances)-compliant packaging.
Performance is guaranteed only under the conditions listed in the specifications table and is
not guaranteed under the full range(s) described by the Absolute Maximum specifications.
Exceeding any of the absolute maximum/minimum specifications may result in permanent
damage to the device and will void the warranty.
CAUTION:
Although this device is designed to be as robust as
possible, ESD (Electrostatic Discharge) can damage
this device. This device must be protected at all times
from ESD. Static charges may easily produce poten-
tials of several kilovolts on the human body or
equipment, which can discharge without detection.
Industry-standard ESD precautions must be employed
at all times.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200132 Rev. D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 29, 2007
1
PRELIMINARY DATA SHEET • SMS3925-079, SMS3925-079LF
Electrical Specifications at 25 °C
Parameter
Reverse current (I
R
)
Capacitance (C
T
)
(1)
Forward voltage (V
F
)
V
R
= 40 V
V
R
= 0 V, F = 1 MHz
I
F
= 1 mA
0.57
0.48
0.62
Condition
Frequency
Min.
Typ.
Max.
10
0.6
0.67
Unit
uA
pF
V
1. Capacitance is total capacitance (C
T
), junction capacitance (C
J
) + package capacitance (C
P
).
Typical Performance Data
0.6
Single
0.5
Capacitance (pF)
SC-79
SMS3925-079
Marking: Cathode
SMS3925-079LF
Marking: Cathode
L
S
= 0.7 nH
LF denotes lead (Pb)-free, RoHS-compliant packaging option as an alternative to our
standard tin/lead (Sn/Pb) packaging.
0.4
0.3
0.2
0.1
0
0
5
10
15
SPICE Model Parameters
Parameter
IS
R
S
N
TT
C
J0
M
E
G
XTI
F
C
B
V
I
BV
V
J
Units
A
Ω
-
s
pF
-
eV
-
-
V
A
V
SMS3925
1.8E-09
5.4
1.7
8E-11
0.36
0.24
0.69
2
0.5
58
1E-05
0.8
10˚ Max.
0.003
(0.07 mm) Min.
0.008
(0.20 mm) Max.
0.010
(0.25 mm) Min.
0.014
(0.35 mm) Max.
Reverse Voltage (V)
Total Capacitance vs. Reverse Voltage
SC-79
Cathode
Indicator
1
0.006 (0.15 mm) Min.
0.028
(0.70 mm) Min.
0.035
(0.90 mm) Max.
2
0.060 (1.50 mm) Min.
0.067 (1.70 mm) Max.
0.043 (1.10 mm) Min.
0.051 (1.30 mm) Max.
0.020
(0.50 mm) Min.
0.028
(0.70 mm) Max.
10˚ Max.
Recommended Solder Reflow Profiles
Refer to the
“Recommended Solder Reflow Profile”
Application Note.
Tape and Reel Information
Refer to the
“Discrete Devices and IC Switch/Attenuators
Tape and Reel Package Orientation”
Application Note.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
March 29, 2007 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200132 Rev. D
PRELIMINARY DATA SHEET • SMS3925-079, SMS3925-079LF
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Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and
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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200132 Rev. D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • December 13,, 2005
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