General description

TSH512

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Doc ID 8120 Rev 7

5.8

Output buffer section

This impedance is compatible with popular biasing circuitry of external transistor drivers of

IR LEDs.

The VOX-MUTE logic signal can be used to control the external LED drivers. When the

audio is not present on the TX1 input, VOX-MUTE is in Low state, the TSH512’s internal

buffers are muted, and the external drivers can be switched off by controlling their bias.

5.9

SBY pin: standby for mono operation

A high state on the Standby pin (SBY) sets the second transmitter TX2 to power-down. The

SBY pin is typically used when the TSH512 is used as a mono transmitter (that is, infrared

microphone transmitter).