TVSF0805
“FemtoFarad” Polymer ESD Suppressor
T
RANSIENT
P
ROTECTION
P
RODUCTS
P
RODUCT
P
REVIEW
DESCRIPTION
KEY FEATURES
!"
Exceeds testing
requirements outlined in IEC
1000-4-2
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Extremely low capacitance
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Very low leakage current
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Fast response time
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Bidirectional
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Surface mount
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Nickel & Tin/Lead plated
APPLICATIONS/BENEFITS
APPLICATIONS/BENEFITS
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GaAs & InGaAs
Photodetector protection
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InGaP HBT Power Amplifier
Protection
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High Speed Data Line
Protection
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Mobile Phone ESD
protection
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.COM
The “FemtoFarad” product family is
specifically designed to protect sensitive
electronic circuits from the threat of
electrostatic discharge (ESD).
“FemtoFarad” products react almost
instantly to the transient voltage and
effectively clamp it below 60 V,
meaning less voltage stress during the
clamp period and greater IC protection.
The design of “FemtoFarad” products
inherently produces a low capacitance
part. In the off-state “FemtoFarad” is
virtually invisible to the circuit. Installed
from signal line to ground, the
“FemtoFarad” device exhibits a high
impedance and low capacitance that
makes it transparent to high-speed
digital circuits. Signals are not distorted
or disrupted.
With “FemtoFarad” devices,
waveform definition stays true and high-
speed signals do not suffer.
“FemtoFarad” products utilize a unique
polymer-based material. The nature of
the material creates a Bidirectional part,
which means that only one device is
required to provide complete ESD
protection regardless of the surge
polarity. The combination of this material
with proven thick film on ceramic
technology produces a reliable, surface
mount product that will help protect
mobile communications, computers, data
processing, test equipment, and many
other electronic applications from ESD.
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
Part Ratings and Characteristics
Performance Characteristics
Continuous operating voltage
1
Clamping voltage
2
Trigger voltage
4
ESD voltage capability
Capacitance (@ 1 MHz)
Leakage current (@ 6 VDC)
1, 4
Peak current
Operating temperature
1,3
ESD pulse withstand
Notes:
1. Per IEC 1000-4-2, 30A @ 8kV, level
4, clamping measurements made 30 ns
after initiation of pulse, all tests in
contact discharge mode.
2. Trigger measurement made using
TLP method (see page5).
3. Parts will remain within the
specifications listed in the above table
through a minimum of 20 ESD pulses.
4. TVSF0805 devices are capable of
withstanding up to a 15 kV, 45 A ESD
pulse. Device ratings are given at 8 kV
per Note 1 unless otherwise specified.
Min
-
-
-
-
-
-
-
-40
20
Typ
-
35
150
8
0.25
<10
30
+25
-
Max
6
60
300
15
1
<100
45
+85
-
Units
VDC
V
V
kV
pF
nA
A
°C
# pulses
Environmental Specifications;
•
•
•
•
•
•
•
Humidity, steady state: MIL-STD-202F, Method 103B, 90-95% RH, 40°C, 96 hrs.
Thermal shock: MIL-STD-202, Method 107G, -65°C to 125°C, 30 min. cycle 5 cycles
Vibration: MIL_STD-202F, Method 201A, (10 to 55 to 10 Hz, 1 min. cycle, 2 hrs each in X-Y-Z)
Chemical resistance: ASTM D-543, 24 hrs @ 50°C, 3 solutions (H
2
0, detergent solution, defluxer)
Full Load voltage: 24 VDC, 1000 hrs, 25°C
Solder leach resistance and terminal adhesion: Per EIA-576
Solderability: MIL-STD-202, Method 208 (95% coverage)
TVSF0805
TVSF0805
Copyright
2000
MSC1590.PDF 2000-09-20
Microsemi
Page 1
Transient Protection Products Group
8700 East Thomas Rd., PO Box 1390, Scottsdale AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
http://www.microsemi.com/tvs
TVSF0805
“FemtoFarad” Polymer ESD Suppressor
T
RANSIENT
P
ROTECTION
P
RODUCTS
P
RODUCT
P
REVIEW
Definition of Terms:
Clamping Voltage –
The voltage at which the “FemtoFarad” device
stabilizes during the transition from high to low impedance. This is the
voltage experienced by the circuit, after stabilizing, for the duration of
the ESD transient.
Trigger Voltage –
The voltage at which the “FemtoFarad” device
begins to function. When the ESD threat voltage reaches this level, the
“FemtoFarad” device begins the transition from high impedance to low
impedance, shunting the ESD energy to ground.
Threat Voltage –
The voltage that the test equipment is set to operate
(i.e. the voltage across the discharge capacitor).
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P
ACKAGE
D
ATA
P
ACKAGE
D
ATA
Copyright
2000
MSC1590.PDF 2000-09-20
Microsemi
Page 2
Transient Protection Products Group
8700 East Thomas Rd., PO Box 1390, Scottsdale AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
http://www.microsemi.com/tvs
TVSF0805
“FemtoFarad” Polymer ESD Suppressor
T
RANSIENT
P
ROTECTION
P
RODUCTS
P
RODUCT
P
REVIEW
Test Methodology
Full product characterization requires testing in a variety of scenarios. Different test methods reveal unique information about
the device response. Evaluating the results for all of the tests is crucial to fully understanding the device operation. Two
different test methods have been employed to understand the “FemtoFarad” device response to an over voltage event.
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.COM
Electrostatic Discharge (ESD) pulse
The ESD pulse is the defining test for an ESD protective device. The ESD pulse is an extremely fast rising transient
event. The pulse is characterized in IEC 1000-4-2, has arise time of less than 1 ns, peak currents up to 45 A, and
voltage levels to 15kV. Characteristics determined by this test are those such as voltage overshoot, peak voltage,
clamping voltage, and peak current.
Due to the extremely fast rate of rise of the ESD pulse, the test setup can have a definite impact on the above factors.
Variable such as wiring inductance and probe capacitance can produce inaccurate readings on an otherwise capable
oscilloscope.
Transmission Line Pulse (TLP)
The transmission line tester implements a controlled impedance cable to deliver a square wave current pulse. The
advantage of this technique is that the constant current of the square wave allows the behavior of the protection
structure to be more studied.
The actual implementation of this technique produces a waveform that has a slightly slower rise time than the ESD
pulse but can be correlated to deliver approximately the same surge current and energy. This controlled impedance
pulse provides a more accurate depiction of the trigger voltage of the device because of the reduced voltage
overshoot caused by a fast rising transient and the reactive components of the test fixture.
Device Application
TVSF0805 “FemtoFarad” devices are applicable to signal line circuits. It is applied in a shunt-connected manner. These
devices are not applicable on line where lightning or load switching transients are present. The devices are ideal for use in
computers and computer-related equipment, such as modems, keyboards, and printers. The TVSF devices are also well suited
for portable electronic equipment such as mobile telephones, test equipment, and card scanners.
Typical Applications
D
ESCRIPTION
D
ESCRIPTION
Copyright
2000
MSCXXX.PDF 2000-09-20
Microsemi
Page 5
Transient Protection Products Group
8700 East Thomas Rd., PO Box 1390, Scottsdale AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
http://www.microsemi.com/tvs
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