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Inova!
Transient Voltage Suppressors
Multilayer Surface Mount TVS
• Application list and suggestion
information
TVS and the Equivalent Circuit
L
Rv
R
C
L
Body Inductance
C
Device Capacitance
Rv
R
The circuit layout is greatly
simplified by the implementation
of varistor protection methods.
It saves PCB space and
improves system reliabilty.
Voltage Variable Resistor
Insulation Resistor
TVS Equivalent Model
Inova! Inc..
Inova! Transient Voltage Supressors
Typical Application
1. Telecommunications: cell phone, PDA, ADSL, Wireless…
2. Consumer electronics: digital camera, CCTV, router, HUB…..
3. Security products: door security, car security alarm…..
4. Measuring and control equipment:
5. Protection for Active components: ICs. Transistors……
6. Other: car windshield, AC to DC motor, ESD protection..,…..
Inova! Inc.
Inova!
Transient Voltage Suppressor
LCD Protection
Audio Circuit Protection
LSI
CONTROLLER
64
COM.
DRIVER
X1
88
D0-D7
LCD
240×64
IN
68 
WR
RD
44
CE
C/D
FS
68 
240
33
33
SEG
DRIVER
X3
1K 
RESET
4.91MHZ
INV-0805ML080C
12
88
IN
2N2222
INV-0805ML180C
INV-0805ML080C
S-RAM
Inova! Inc.
= TVS
Inova!
Transient Voltage Suppressor
Keyboard Protection
ASIC Protection
FERRITE
Keyboard
74AHCT05
ASIC
BEAD
Vcc
Controller
DATA
0805ML080C
FERRITE
74AHCT05
INV-0805-ML240C
or 0805ML080C
GND
BEAD
CLOCK
RESET
0805ML240C or
0805ml080c
INV-0805ML080C
= TVS
Inova! Inc.
Inova!
Transient Voltage Suppressor
NOTEBOOK
IC Protection
& WORK STATION
OUTPUT
D
D
INV-0805 or
ML080C or
0603 0402
series
D
D
MAX211
DRVR/RCVR
IC
INPUT
INV-0805ML080C
INV-0805ML080C
＋Vcc
R
R
R
INV-0805ML080C
POWER SUPPLY LINE
R
R
1.
Above contact 4KV(level 2) in general
2.
Protection for keypad area circuit
3.
Protection for I/O connector area circuit
= TVS
Inova!
Transient Voltage Suppressor
LM319 Relay Driver
＋ 5V
Typical Sensor Protection
＋ 28V
INV-0805ML330C
1μF
180Ω
1N4004
1N4004
RELAY
0805ML180C
120MOV
0.01μF
1N4004
IN 1
½ LM319
IN 2
= TVS
Inova! Inc.
Inova!
Transient Voltage Suppressor
MOSFET Protection
CMOS RELAY DRIVERS
Vcc
TO LOAD AND SUPPLY
DRAIN
IN1
INV-0805-ML080C
IN2
INPUT
GATE
INV-0805-ML080C
SOURCE
½ MM74C908 MM74C918
RELAY
INV-0805-ML240C
= TVS
Inova! Inc.
Inova!
Transient Voltage Suppressor
Preamplifier Protection
Hall Device Protection
＋5V
DC12V（Vdd）
15pF
8
INV-0805-ML150C
H1
H2
H1,H2,H3 ：Hall Device
H3
Vcc
1
16
2
15
3
14
4
10 μ h
10
μ PC1246C
13
5
12
6
11
1.8kΩ
RF INPUT
MPF102
0.01 μF
1MΩ
7
0.01 μ F
NEXT
STAGE
180pF
100Ω
GND
INV-0805-ML240C
9
= TVS
Inova! Inc.
Inova!
Transient Voltage Suppressor
General application
= TVS
Inova!
Transient Voltage Suppressor
Laser Diode Protection
1N4148
1Ω
INV-0805-ML240C
0.1μF
100 Ω
2N4400
LASER DIODE
2N6659
100pF
1kΩ
1N4148
VN64GA
2N4400
2N6659
= TVS
Inova! Inc.
Inova!
Suggestion: 1206
and 1210 series
= TVS
Transient Voltage Suppressor
Application Field-Digital camara
1. Above contact 8Kv(level 4) in general
2. Protect for keypad area circuit
3. Protection for battery power unit circuit
4. Protection for I/O connector area circuit
Suggestion: 0603 series ex:0603ML240C
Security series:
Suggestion: 1206, 1210 series ex:1206ML240C;
1206ML820C
Application Field-Cellular Phone
GSM-1 CDMA; PDA
1.
Above contact 8Kv(Level 4) in general
2.
Protection for SW or SW in antenna
3.
Protection for speaker, mic. & earphone
4.
Protection for keypad area circuit
5.
Protection for battery power unit circuit
6.
Protection for I/O connector area circuit
7.
Protection for accessory cable circuit
Suggestion item:
INV0402ME180M100(10P)
IN0402ME180M220(22P)
INV0402ME180M400(40P)
INV0402ME180M800(80P)
Mother Board application
1.
Above contact 4kV(level 2) in general (High speed CPU likes Pentium 4)
2.
Protection for I/O connector area circuit RS232 especially (Male type
connector)
Wireless
suggestion item: 0402 and 0603 series
Suggestion 0603ME180M220; INV0603ML080C
Touch panel
The surge and ESD problem will cause the damaged of the IC of touch panel
Protection for IC I/O circuit and should meet IEC61000-4-2 level 4 standard
Suggestion: INVI0603ML080C; INV0603ME180M220
Application Field-VGA Card
1. Above contact 4kV(level 2) in general
2. Protection for VGA port circuit
Suggestion:
0402; 0603 series: ex: 0402ME180M100(10P);
0402ME200(20P);0603ME180M220(22P); 0603ME180M330(33P)
Application Field-LAN HUB
1. Above contact 4kV(level 2) in general (High speed likes Gigabit)
2. Protection for power unit circuit
3. Protection for RJ45 connector circuit
ADSL Modem-Product application
Cable Modem / Router
For instead of SIDACtor series and cost down,
FOR FCC PART 68SURGE and surge could up
to 6KV(10/1000 test up to 1500A) the respond
time is 0.5ns, good protection.
Item suggestion
CH series
= TVS
Telecommunication charger
application information
General, people will use diode in
USB 1.0, therefore in USB 2.0 the
speed increase, the capacitance is the
major key. Our products meet
IEC61000-4-2 LEVEL 4 specification
and very good protection in ESD
problem.
Suggestion item
INV0603ML080C
INV0603ML120C
INV0603ML150C
INV0603ML220C
※MLE ESD series the capacitance could
according to customer request!
Capacitance 5PF~3000PF)
size(0402~1210)