ESDA6V1U1 TRANSIL ARRAY FOR ESD PROTECTION Application Specific Discretes

ESDA6V1U1 TRANSIL ARRAY FOR ESD PROTECTION Application Specific Discretes
ESDA6V1U1
Application Specific Discretes
A.S.D.
TRANSIL ARRAY
FOR ESD PROTECTION
APPLICATIONS
Where transient overvoltage protection in ESD
sensitive equipment is required, such as :
COMPUTERS
PRINTERS
COMMUNICATION SYSTEMS
GSM HANDSETS AND ACCESSORIES
CAR RADIO
It is particulary recommended for parallel port
protection where the line interface withstands only
2 kV ESD surge.
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SO-8
FEATURES
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6 UNIDIRECTIONAL TRANSIL FUNCTIONS
LOW LEAKAGE CURRENT: IR max. < 2 µA
200 W PEAK PULSE POWER (8/20 µs)
FUNCTIONAL DIAGRAM
DESCRITION
The ESDA6V1U1 is a monolithic 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.
BENEFITS
High ESD protection level : up to 25 kV
High integration
Suitable for high density boards
COMPLIES WITH THE FOLLOWING STANDARDS :
IEC61000-4-2 : level 4
MIL STD 883C-Method 3015-6 : class3
(human body model)
August 2002 - Ed: 3A
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ESDA6V1U1
ABSOLUTE MAXIMUM RATINGS (Tamb = 25°C)
Symbol
Parameter
Value
Unit
VPP
Electrostatic discharge
MIL STD 883C - Method 3015-6
25
kV
PPP
Peak pulse power (8/20µs)
200
W
Tstg
Tj
Storage temperature range
Maximum junction temperature
- 55 to + 150
125
°C
°C
TL
Maximum lead temperature for soldering during 10s
260
°C
ELECTRICAL CHARACTERISTICS (Tamb = 25°C)
Symbol
Parameter
VRM
Stand-off voltage
VBR
Breakdown voltage
VCL
Clamping voltage
IRM
Leakage current
IPP
Peak pulse current
αT
Voltage temperature coefficient
C
Capacitance
Rd
Dynamic resistance
VF
Forward voltage drop
Types
min.
ESDA6V1U1
IR
VBR
@
max.
Rd
αT
C
max.
typ.
max.
typ.
note 1
note 2
0V bias
-4
VF @
IF
max.
V
V
mA
µA
V
Ω
10 /°C
pF
V
mA
6.1
7.2
1
2
5
0.5
6
100
1.5
200
note 1 : Square pulse, Ipp = 25A, tp=2.5µs.
note 2 : ∆ VBR = αT* (Tamb -25°C) * VBR (25°C)
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IRM @ VRM
ESDA6V1U1
CALCULATION OF THE CLAMPING VOLTAGE
USE OF THE DYNAMIC RESISTANCE
The ESDA family has been designed to clamp fast
spikes like ESD. Generally the PCB designers
need to calculate easily the clamping voltage VCL.
This is why we give the dynamic resistance in
addition to the classical parameters. The voltage
across the protection cell can be calculated with
the following formula:
VCL = VBR + Rd IPP
As the value of the dynamic resistance remains
stable for a surge duration lower than 20µs, the
2.5µs rectangular surge is well adapted. In
addition both rise and fall times are optimized to
avoid any parasitic phenomenon during the
measurement of Rd.
Where Ipp is the peak current through the ESDA cell.
DYNAMIC RESISTANCE MEASUREMENT
The short duration of the ESD has led us to prefer
a more adapted test wave, as below defined, to the
classical 8/20µs and 10/1000µs surges.
2.5µs duration measurement wave.
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ESDA6V1U1
Fig. 1 : Peak power dissipation versus initial
junction temperature.
Fig. 2 : Peak pulse power versus exponential
pulse duration (Tj initial = 25 °C).
Fig. 3 : Clamping voltage versus peak pulse
current (Tj initial = 25 °C).
Rectangular waveform tp = 2.5 µs.
Fig. 4 : Capacitance versus reverse applied
voltage (typical values).
Fig. 5 : Relative variation of leakage current
versus junction temperature (typical values).
Fig. 6 : Peak forward voltage drop versus peak
forward current (typical values).
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ESDA6V1U1
APPLICATION EXAMPLE : Protection of logic-level signals.
APPLICATION EXAMPLE : Protection of symmetrical signals.
Note : Capacitance value between any I/O pin and Ground is divided by 2.
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ESDA6V1U1
ORDER CODE
ESDA
6 V 1 U 1
RL
PACKAGING:
RL = Tape and reel
= Tube
PACKAGE: SO8 PLASTIC
ESD ARRAY
Unidirectionel
VBR min
MARKING : Logo, Date Code, E6V1U1
PACKAGE MECHANICAL DATA
SO-8 Plastic
DIMENSIONS
REF.
Millimetres
Min.
A
a1
a2
b
b1
C
c1
D
E
e
e3
F
L
M
S
Typ.
Max.
Inches
Min.
1.75
0.25 0.004
1.65
0.48 0.014
0.25 0.007
0.1
0.35
0.19
0.50
Max.
0.069
0.010
0.065
0.019
0.010
0.020
45° (typ)
5.0 0.189
6.2 0.228
4.8
5.8
1.27
3.81
3.8
0.4
Typ.
0.197
0.244
0.050
0.150
4.0 0.15
1.27 0.016
0.6
8° (max)
0.157
0.050
0.024
Packaging : Preferred packaging is tape and reel.
Weight : 0.08g.
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of
use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by
implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to
change without notice. This publication supersedes and replaces all information previously supplied.
STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 2002 STMicroelectronics - Printed in Italy - All rights reserved.
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