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參數(shù)資料
| 型號： | SRDA3.3-6.TBT |
| 元件分類： | TVS二極管 - 瞬態(tài)電壓抑制 |
| 英文描述： | 500 W, UNIDIRECTIONAL, SILICON, TVS DIODE, MS-012AA |
| 封裝： | HALOGEN FREE ANG ROHS COMPLIANT, SOP-8 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 163K |
| 代理商： | SRDA3.3-6.TBT |
5
2010 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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SRDA3.3-6T | 500 W, UNIDIRECTIONAL, SILICON, TVS DIODE, MS-012AA |
| SRDA05-6T | 500 W, UNIDIRECTIONAL, SILICON, TVS DIODE, MS-012AA |
| SRF1090 | 5 A, 90 V, SILICON, RECTIFIER DIODE, TO-220AB |
| SRF10150 | 5 A, 150 V, SILICON, RECTIFIER DIODE, TO-220AB |
| SRF1030 | 5 A, 30 V, SILICON, RECTIFIER DIODE, TO-220AB |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SRDA5-6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Direct ProTek Replacement:PSRDA5-6 |
| SRDA70-4 | 制造商:Semtech Corporation 功能描述:500 W, UNIDIRECTIONAL, 8 ELEMENT, SILICON, TVS DIODE |
| SRDA70-4.T | 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays ±15KV 8-Pin SOIC T/R |
| SRDA70-4.TB | 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:ESD Suppressor Diode Arrays ??15KV 8-Pin SOIC T/R |
| SRDA70-4.TBT | 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays 制造商:Semtech Corporation 功能描述:70V 24A LOW CAP RAILCLAMP TVS DIODE ARRA 制造商:Semtech Corporation 功能描述:SRDA Series 3.3 V 4 pF SMT RailClamp Low Capacitance TVS Diode Array - SOIC-8 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 |
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