SR70.TCT Semtech, SR70.TCT Datasheet - Page 4

• Manufacturer Part Number: SR70.TCT
• Description: IC TVS ARRAY 2-LINE 300W SOT-143
• Manufacturer: Semtech
• Series: RailClamp®r

Specifications of SR70.TCT

• Voltage - Reverse Standoff (typ): 70V
• Voltage - Breakdown: 85V
• Power (watts): 300W
• Polarization: 2 Channel Array - Unidirectional
• Mounting Type: Surface Mount
• Package / Case: SOT-143, SOT-143B, TO-253AA
• Suppressor Type: Diode Arrays
• Esd Protection Voltage: 15KV@Air Gap/8KV@Contact Disc
• Configuration: Dual
• Mounting Style: Surface Mount
• Clamping Voltage (max): 7VV
• Working Voltage (max): 70VV
• Leakage Current (max): 5uAA
• Operating Temperature Min Deg. C: -55C
• Operating Temperature Max Deg. C: 125C
• Product Length (mm): 3.04(Max)mm
• Product Depth (mm): 1.4(Max)mm
• Product Height (mm): 1.1mm
• Pin Count: 3 +Tab
• Rad Hardened: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SR70TR

Device Connection Options for Protection of Two
High-Speed Data Lines
The SR70 is designed to protect two data lines from
transient over-voltages by clamping them to a fixed
reference. When the voltage on the protected line
exceeds the reference voltage (plus diode V
steering diodes are forward biased, conducting the
transient current away from the sensitive circuitry.
Data lines are connected at pins 2 and 3. The nega-
tive reference (REF1) is connected at pin 1. This pin
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 (REF2) is connected at pin 4.
The options for connecting the positive reference are
as follows:
1. To protect data lines and the power line, connect
2. In applications where no positive supply reference
PROTECTION PRODUCTS
Applications Information
2003 Semtech Corp.
pins 2 and 3 directly to the positive supply rail (V
In this configuration the data lines are referenced
to the supply voltage. An external TVS diode may
be added between the supply rail and ground in
order to prevent over-voltage on the supply rail.
is available, or complete supply isolation is desired,
an external TVS diode may be used as the refer-
ence. The steering diodes will begin to conduct
when the voltage on the protected line exceeds the
working voltage of the TVS (plus one diode drop).
F
) the
CC
).
4
Data Line and Power Supply Protection Using Vcc as
reference
SR70 Pin Configuration
1
2
4
3
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