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T4240/T4160 Thermal Monitoring Unit De-Featured?

Question asked by Anne Weng on Jun 18, 2015
Latest reply on Jun 19, 2015 by Serguei Podiatchev

The T4240/T4160 has thermal diode pins TD1_ANODE, TD1_CATHODE, TD2_ANODE, and TD2_CATHODE. However, on the pinout list by bus table in the datasheet there is a footnote 24 by each of these pins that says Thermal Monitoring Unit is de-featured on this current silicon. Does this mean that these diode pins are essentially non-functioning currently? There doesn't seem to be anything that states exactly what the Thermal Monitoring Unit is -- whether it's an internal function or just the external pins. The datasheet even recommends using the ADT7481A as an external temperature monitor and references AN4787 Temperature Measurements Using an On-Die Thermal Diode. I feel like I'm getting mixed messages here since the de-featured footnote is referenced to the individual pins but the datasheet is recommending an external temperature monitor. If I hook these diodes up to an external temperature sensor like the ADT7481A, will it work?

 

Thanks.

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