SHANGHAI
MICROELECTRONICS CO., LTD.
June 2006
SESOT Series
Transient Voltage Suppressors for ESD Protection
General Description
The SESOT Series is a transient voltage
suppressor designed to protect components which
are connected to data and transmission lines
against ESD. It clamps the voltage just above the
logic level supply for positive transients and to a
diode drop below ground for negative transients.
Revision:B
Features
Unidirectional Transil functions
Low leakage current: I
R
max< 20
μA
at V
RM
500W peak pulse power(8/20μs)
Transient protection for data lines as per
Complies with the following standards
Applications
Computers
Printers
Communication systems
IEC61000-4-2
Level 4
15 kV (air discharge)
8 kV(contact discharge)
MIL STD 883E - Method 3015-7 Class 3
25 kV HBM (Human Body Model)
Functional diagram
Absolute Ratings (T
amb
=25
°C )
Symbol
Parameter
Value
Units
P
PP
T
L
T
stg
T
op
T
j
Peak Pulse Power (t
p
= 8/20μs)
Maximum lead temperature for soldering during 10s
Storage Temperature Range
Operating Temperature Range
Maximum junction temperature
Electrostatic discharge
500
260
-55 to +155
-40 to +125
150
W
°C
°C
°C
°C
V
PP
IEC61000-4-2 air discharge
IEC61000-4-2 contact discharge
15
8
kV
ShangHai Sino-IC Microelectronics Co., Ltd.
1.
SESOT Series
Electrical Parameter
Symbol
I
PP
V
C
V
RWM
I
R
I
T
V
BR
I
F
V
F
Parameter
Maximum Reverse Peak Pulse Current
Clamping Voltage @ I
PP
Working Peak Reverse Voltage
Maximum Reverse Leakage Current @
V
RWM
Test Current
Breakdown Voltage @ I
T
Forward Current
Forward Voltage @ I
F
Electrical Characteristics
Part Numbers
Min.
V
SESOT04
SESOT05
SESOT08
SESOT12
5.0
6.2
8.5
13.3
V
BR
Typ.
V
5.6
6.6
9.0
14.0
Max.
V
6.4
7.1
9.9
14.7
I
T
mA
1
1
1
1
V
RWM
V
4.0
5.0
8.0
12.0
I
R
µA
1
1
1
1
V
F
Max.
V
1.25
1.25
1.25
1.25
I
F
mA
200
200
200
200
C
Typ. 0v
bias
pF
300
220
190
150
1).8/20 waveform used. (see fig2.)
Typical Characteristics
Fig1. Peak Pulse Power VS Pulse Time
ShangHai Sino-IC Microelectronics Co., Ltd.
2.
SESOT Series
Fig2. Pulse Waveform
Fig3.Power Derating Curve
Application Note
Electrostatic discharge (ESD) is a major cause of failure in electronic systems. Transient Voltage
Suppressors (TVS) are an ideal choice for ESD protection. They are capable of clamping the incoming
transient to a low enough level such that damage to the protected
semiconductor is prevented.
Surface mount TVS offers the best choice for minimal lead inductance. They serve as parallel protection
elements, connected between the signal lines to ground. As the transient rises above the operating voltage of
the device, the TVS becomes a low impedance path diverting the transient current to ground. The SESOT
Series is the ideal board evel protection of ESD sensitive semiconductor components.
The tiny SOT-23 package allows design flexibility in the design of high density boards where the space
saving is at a premium. This enables to shorten the routing and contributes to hardening against ESD.
ShangHai Sino-IC Microelectronics Co., Ltd.
3.
SESOT Series
Package mechanical data
Dim
A
A1
A2
b
c
D
E
E1
e
e1
L1
q
S
Millimeters
Min
1.00
0
1.00
0.35
0.10
2.70
2.40
1.40
0.85
1.80
0.40
0°
0.45
TYP
1.20
0.05
1.15
0.40
0.15
2.90
2.60
1.50
1.00
1.90
.
5°
0.50
10°
0.55
Max
1.40
0.10
1.30
0.50
0.20
3.10
2.80
1.60
1.15
2.00
The SINO-IC logo is a registered trademark of ShangHai Sino-IC Microelectronics Co., Ltd.
© 2005 SINO-IC – Printed in China – All rights reserved.
SHANGHAI SINO-IC MICROELECTRONICS CO., LTD
Add:
Building 3, Room 3401-03, No.200 Zhangheng Road, ZhangJiang Hi-Tech Park, Pudong,
Shanghai 201203, China
Phone:
+86-21-33932402 33932403 33932405 33933508 33933608
Fax:
+86-21-33932401
Email:
webmaster@sino-ic.com
Website:
http://www.sino-ic.com
ShangHai Sino-IC Microelectronics Co., Ltd.
4.
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