L054BT26 Datasheet, PDF (3/8 Pages) Sirectifier Global Corp. – Low Capacitance Surface Mount TVS Diodes

L054BT26
APPLICATION INFORMATION
1.0 Four High-Speed Data Lines Protection
The L054BT26 TVS diode is designed to protect up to four data lines from transient over-voltages by
clamping them to a fixed reference. When the voltage on the protected line(s) exceeds the reference
voltage (plus diode V_F), the steering diodes are forward biased, conducting the transient current away
from the protected circuitry. The data lines are connected to pins 1, 2, 4 and 6. The negative reference
(REF1) is connected to pin 2 (This pin should be connected directly to the ground plane on the PCB for
best results). The path length is kept as short as possible to minimize parasitic inductance. The
positive reference (REF2) is connected to pin 5.
The typical options for connecting the positive reference are as follows:
A. DATA LINE AND POWER SUPPLY PROTECTION USING V_CC AS REFERENCE
To protected data lines and the power line, connect pin 5 directly to the positive supply rail (VCC).
In this configuration, the data lines are referenced to the supply voltage. The internal TVS diode
prevents over-voltage on the supply rail.
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