L054BT26
APPLICATION INFORMATION (continued)
3.0 Audio interface ESD Protection
Another typical application of the L054BT26 is ESD protection of the Right/Left channel and TMC
terminals of an audio interface. Referring to the schematic diagram below, the Right and Left
channels of the audio connector are connected to the ESD protection pins (such as pin 1 and pin 6)
of the L054BT26. In addition, the TMC terminals of the audio connector are also connected to the
ESD protection pins (such as pin 3 and pin 4) of the device. Regarding the power pin (pin 5) of the
device, this should be directly connected to the VDD power supply.
In this configuration, when an electrostatic discharge (ESD) voltage pulse appears on the Right or
Left channel or TMC terminals of audio connector, the ESD pulse current will automatically be
discharged by by the L054BT26. Therefore, the Right/Left channel and TMC terminals of the audio
chip are complementally protected with an L054BT26 device.
Typical Audio Interface Application of the L054BT26
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