SEMTECH UCLAMP3301H

uClamp3301H
Low Voltage µClampTM
for ESD and CDE Protection
PROTECTION PRODUCTS - MicroClampTM
Description
Features
The µClamp series of Transient Voltage Suppressors
(TVS) are designed to replace multilayer varistors
(MLVs) in portable applications such as cell phones,
notebook computers, and PDAs. They offer superior
electrical characteristics such as lower clamping
voltage and no device degradation when compared to
MLVs. They are designed to protect sensitive semiconductor components from damage or upset due to
electrostatic discharge (ESD), lightning, electrical fast
transients (EFT), and cable discharge events (CDE).
The µclampTM3301H is constructed using Semtech’s
proprietary EPD process technology. The EPD process
provides low standoff voltages with significant reductions in leakage currents and capacitance over siliconavalanche diode processes. They feature a true
operating voltage of 3.3 volts for superior protection
when compared to traditional pn junction devices.
The µclamp3301H is in a SOD-523 package and will
protect one unidirectional line. They give the designer
the flexibility to protect one line in applications where
arrays are not practical.
They may be used to meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (15kV air, 8kV
contact discharge).
TM
‹ Transient protection for data lines to
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Mechanical Characteristics
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EIAJ SOD-523 package
Molding compound flammability rating: UL 94V-0
Marking : Marking code, cathode band
Packaging : Tape and Reel per EIA 481
Lead Finish: Matte tin
Applications
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Dimensions
0.35
IEC 61000-4-2 (ESD) 20kV (air), 10kV (contact)
IEC 61000-4-4 (EFT) 40A (tp = 5/50ns)
Cable Discharge Event (CDE)
Ultra-small SOD-523 package (1.7 x 0.9 x 0.7mm)
Protects one I/O or power line
Low clamping voltage
Working voltage: 3.3V
Low leakage current
Solid-state silicon-avalanche technology
Cellular Handsets & Accessories
Cordless Phones
Personal Digital Assistants (PDAs)
Notebooks & Handhelds
Portable Instrumentation
Digital Cameras
Peripherals
MP3 Players
Schematic & PIN Configuration
1.70
1.30
0.9
0.70
Maximum Dimensions (mm)
Revision 06/18/2004
SOD-523 (Top View)
1
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uClamp3301H
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20µs)
Pp k
40
Watts
Maximum Peak Pulse Current (tp = 8/20µs)
Ip p
5
Amps
ESD per IEC 61000-4-2 (Air)
ESD per IEC 61000-4-2 (Contact)
V PP
+/- 20
+/- 15
kV
Lead Soldering Temperature
TL
260 (10 sec.)
°C
Operating Temperature
TJ
-55 to +125
°C
TSTG
-55 to +150
°C
Storage Temperature
Electrical Characteristics (T=25oC)
Parameter
Reverse Stand-Off Voltage
Symbol
Conditions
Minimum
Typical
VRWM
Maximum
Units
3.3
V
Punch-Through Voltage
V PT
IPT = 2µA
3.5
V
Snap -Back Voltage
VSB
ISB = 50mA
2.8
V
Reverse Leakage Current
IR
VRWM = 3.3V
Clamp ing Voltage
VC
Clamp ing Voltage
0.5
µA
IPP = 1A, tp = 8/20µs
5.5
V
VC
IPP = 5A, tp = 8/20µs
8.0
V
Reverse Clamp ing Voltage
VCR
IPP = 1A, tp = 8/20µs
2.4
V
30
pF
Cj
I/O p in to Gnd
VR = 0V, f = 1MHz
25
Junction Cap acitance
I/O p in to Gnd
VR = 3.3V, f = 1MHz
14
 2004 Semtech Corp.
2
0.05
pF
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uClamp3301H
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Power Derating Curve
110
1
100
% of Rated Power or I PP
Peak Pulse Power - P PP (kW)
90
0.1
80
70
60
50
40
30
20
10
0
0
25
0.01
0.1
1
10
100
50
75
100
125
150
Ambient Temperature - TA (oC)
1000
Pulse Duration - tp (µs)
Clamping Voltage vs. Peak Pulse Current
Junction Capacitance vs. Reverse Voltage
12
25.0
20.0
8
Capacitance - Cj (pF)
Clamping Voltage - VC (V)
f = 1 MHz
10
6
4
Waveform
Parameters:
tr = 8µs
td = 20µs
2
15.0
10.0
5.0
0
0
1
2
3
4
0.0
5
0
Peak Pulse Current - IPP (A)
Insertion Loss S21
CH1 S21
LOG
START . 030 MHz
 2004 Semtech Corp.
0.5
1
1.5
2
2.5
Reverse Voltage - VR (V)
3
3.5
ESD Clamping
(8kV Contact per IEC 61000-4-2)
6 dB / REF 0 dB
STOP 3000. 000000 MHz
3
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uClamp3301H
PROTECTION PRODUCTS
Applications Information
Device Schematic & Pin Configuration
Device Connection Options
The µclamp3301H is designed to protect one I/O, or
power supply line. It will present a high impedance to
the protected line up to 3.3 volts. It will “turn on”
when the line voltage exceeds 3.5 volts. The device is
unidirectional and may be used on lines where the
signal polarity is above ground. The cathode band
should be placed towards the line that is to be
protected.
EPD TVS Characteristics
These devices are constructed using Semtech’s
proprietary EPD technology. The structure of the EPD
TVS is vastly different from the traditional pn-junction
devices. At voltages below 5V, high leakage current
and junction capacitance render conventional avalanche technology impractical for most applications.
However, by utilizing the EPD technology, these devices
can effectively operate at 3.3V while maintaining
excellent electrical characteristics.
EPD TVS IV Characteristic Curve
IPP
The EPD TVS employs a complex nppn structure in
contrast to the pn structure normally found in traditional silicon-avalanche TVS diodes. The EPD mechanism is achieved by engineering the center region of
the device such that the reverse biased junction does
not avalanche, but will “punch-through” to a conducting state. This structure results in a device with superior DC electrical parameters at low voltages while
maintaining the capability to absorb high transient
currents.
ISB
IPT
VF
IR
VRWM
VSB VPT VC
IF
Matte Tin Lead Finish
Matte tin has become the industry standard lead-free
replacement for SnPb lead finishes. A matte tin finish
is composed of 100% tin solder with large grains.
Since the solder volume on the leads is small compared to the solder paste volume that is placed on the
land pattern of the PCB, the reflow profile will be
determined by the requirements of the solder paste.
Therefore, these devices are compatible with both
lead-free and SnPb assembly techniques. In addition,
unlike other lead-free compositions, matte tin does not
have any added alloys that can cause degradation of
the solder joint.
 2004 Semtech Corp.
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uClamp3301H
PROTECTION PRODUCTS
Outline Drawing
Land Pattern
 2004 Semtech Corp.
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uClamp3301H
PROTECTION PRODUCTS
Marking Code
Ordering Information
3H
Part Number
Working
Voltage
uClamp 3301H.TCT
5V
Device Qty per
Marking
Reel
3H
3,000
Reel
Size
7 Inch
MicroClamp, uClamp and µClamp are trademarks of Semtech
Corporation
Tape and Reel Specification
Tape Specifications
Device Orientation in Tape
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
 2004 Semtech Corp.
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