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Product Summary
Feature
ESD protects two +12V to -7V linesLow capacitance
Low reverse clamping voltage
Low leakage current
Fast response time
Device Meets MSL 1 Requirements
ROHS compliant
Application
Data lines
Industrial Controls
Computers and peripherals
Portable instrumentation
Peripherals
Security systems
Protection of RS-485 transceivers with extended common-mode range
Automatic Teller Machines
HFC systems
Networks
Marking:
Front Side
712=Device Code
GESDBNKPC4
Asymmetrical TVS Diode for Extended Common-Mode RS-485
SOT-23
Schematic diagram
The GESDBNKPC4 replaces four discrete components by integrating two 12V and
two 7V TVS diodes in a single package. The integrated design aids in reducing voltage
over-shoot associated with trace inductance. The low clamping voltage of the
GESDBNKPC4 minimizes the stress on the protected transceiver. The GESDBNKPC4
transient voltage suppressor (TVS) diode is designed for asymmetrical (12V to -7V )
protection in multi-point data transmission standard RS-485 applications.
The GESDBNKPC4 has been specifically designed to protect sensitive components
which are connected to data and transmission lines from overvoltage caused by
ESD(electrostatic discharge), CDE (Cable Discharge Events),and EFT (electrical fast
transients).
GESDBNKPC4
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Absolute Maximum Ratings (T
a
=25℃ unless otherwise noted)
Parameter
Symbol
Value
IEC 61000-4-2 ESD Voltage Air Model
V
ESD
1)
±15
JESD22-A114-B ESD Voltage Contact Model
±15
ESD Voltage Per Human Body Model
±8
ESD Voltage Machine Model
±0.4
Peak Pulse Power
PPP
2)
400
Peak Pulse Current
IPP
2)
12
Lead Solder Temperature − Maximum (10 Second Duration)
TL
260
Junction Temperature
Tj
-55~ +150
Storage Temperature Range
Tstg
-55~ +150
1) Device stressed with ten non-repetitive ESD pulses.
2) Non-repetitive current pulse 8/20μs exponential decay waveform according to IEC61000-4-5.
ESD Standards Compliance
IEC61000-4-2 Standard JESD22-A114-B Standard
Contact Discharge
Air Discharge
Level
Test Voltage kV
Level
Test Voltage kV
1
2
1
2
2
4
2
4
3
6
3
8
4
8
4
15
Contact discharge current waveform per IEC61000-4-2 8/20μs waveform per IEC61000-4-5
ESD Class
Human Body Discharge V
0
0～249
1A
250～499
1B
500～999
1C
1000～1999
2
2000～3999
3A
4000～7999
3B
8000～15999
t
60ns
30ns
t
r
= 0.7~1ns
10
90
100
Current (%)
Time (ns)
0 5 10 15 20 25 30
0
100
90
50
10
T
2
T
1
Front time: T
1
= 1.25 T = 8s
Time to half-value: T
2
= 20s
Peak pulse current (%)
Time (s)
T