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参数资料
| 型号： | SRDA05-6 |
| 元件分类： | 参考电压二极管 |
| 英文描述： | 500 W, UNIDIRECTIONAL, SILICON, TVS DIODE, MS-012AA |
| 封装： | SOP-8 |
| 文件页数： | 5/9页 |
| 文件大小： | 198K |
| 代理商： | SRDA05-6 |
5
2008 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
SRDA3.3-6 and SRDA05-6
Device Connection Options for Protection of Six High-
Speed Lines
The SRDA TVS is designed to protect four data lines
from transient overvoltages by clamping them to a
fixed reference. When the voltage on the protected
line exceeds the reference voltage (plus diode V
F) the
steering diodes are forward biased, conducting the
transient current away from the sensitive circuitry.
Data lines are connected at pins 1, 2, 4, 5, 6 and 7.
The negative reference is connected at pin 8. These
pins should be connected directly to a ground plane on
the board for best results. The path length is kept as
short as possible to minimize parasitic inductance.
The positive reference is connected at pins 2 and 3.
In the case of the SRDA3.3-6, pins 2 and 3 are
connected internally to the cathode of the low voltage
TVS. It is not recommended that these pins be directly
connected to a DC source greater than the snap-back
votlage (V
SB) as the device can latch on as described
below.
EPD TVS Characteristics
These devices are constructed using Semtech’s
proprietary EPD technology. By utilizing the EPD tech-
nology, the SRDA3.3-6 can effectively operate at 3.3V
while maintaining excellent electrical characteristics.
The EPD TVS employs a complex nppn structure in
contrast to the pn structure normally found in tradi-
tional silicon-avalanche TVS diodes. Since the EPD
TVS devices use a 4-layer structure, they exhibit a
slightly different IV characteristic curve when compared
to conventional devices. During normal operation, the
device represents a high-impedance to the circuit up to
the device working voltage (V
RWM). During an ESD
event, the device will begin to conduct and will enter a
low impedance state when the punch through voltage
(V
PT) is exceeded. Unlike a conventional device, the low
voltage TVS will exhibit a slight negative resistance
characteristic as it conducts current. This characteris-
tic aids in lowering the clamping voltage of the device,
but must be considered in applications where DC
voltages are present.
When the TVS is conducting current, it will exhibit a
slight “snap-back” or negative resistance characteris-
tics due to its structure. This point is defined on the
Data Line Protection Using Internal TVS Diode as
Reference
Applications Information
curve by the snap-back voltage (V
SB) and snap-back
current (I
SB).
To return to a non-conducting state, the
current through the device must fall below the I
SB
(approximately <50mA) and the voltage must fall below
the V
SB (normally 2.8 volts for a 3.3V device). If a 3.3V
TVS is connected to 3.3V DC source, it will never fall
below the snap-back voltage of 2.8V and will therefore
stay in a conducting state.
EPD TVS IV Characteristic Curve
IPP
I
SB
IPT
I
R
VRWM
V
PT VC
VBRR
I
BRR
SB
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SRDA056.T | 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays ±15KV 8-Pin SOIC T/R 制造商:Semtech 功能描述:ESD Suppressor Diode Arrays ±15KV 8-Pin SOIC T/R |
| SRDA05-6.T | 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays ±15KV 8-Pin SOIC T/R 制造商:Semtech Corporation 功能描述:SRDA Series 15 V 8 pF SMT RailClamp Low Capacitance TVS Diode Array - SOIC-8 制造商:Semtech Corporation 功能描述:TVS DIODE ARRAY, 500W, 5V, SOIC; Diode Type:Low Capacitance; Clamping Voltage Vc Max:20V; Operating Voltage:1.5V; Diode Case Style:SOIC; No. of Pins:8; Breakdown Voltage Vbr:6V; Capacitance, Cd:4pF; Junction Capacitance:15pF ;RoHS Compliant: Yes 制造商:Semtech 功能描述:ESD Suppressor Diode Arrays ±15KV 8-Pin SOIC T/R |
| SRDA05-6.TB | 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays |
| SRDA05-6.TBT | 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays 制造商:Semtech Corporation 功能描述:DIODE TVS 5V 制造商:Semtech Corporation 功能描述:DIODE, TVS, 5V 制造商:Semtech Corporation 功能描述:SRDA Series 15 V 8 pF SMT RailClamp Low Capacitance TVS Diode Array - SOIC-8 制造商:Semtech Corporation 功能描述:TVS DIODE ARRAY, 500W, 5V, SOIC; Diode Type:Low Capacitance; Clamping Voltage Vc Max:20V; Operating Voltage:1.5V; Diode Case Style:SOIC; No. of Pins:8; Breakdown Voltage Vbr:6V; Capacitance, Cd:4pF; Junction Capacitance:15pF ;RoHS Compliant: Yes 制造商:Semtech 功能描述:ESD Suppressor Diode Arrays 制造商:SEMTECH 功能描述:5V 25A LOW CAP RAILCLAMP TVS DIODE ARRAY 6 LINES |
| SRDA05-6.TBT | 制造商:Semtech Corporation 功能描述:TVS Diode |
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