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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LM40 Datenblatt(PDF) 2 Page - National Semiconductor (TI) |
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LM40 Datenblatt(HTML) 2 Page - National Semiconductor (TI) |
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2 / 27 page  Connection Diagram TSSOP-14 20068402 Top View National Package Number MTC14C Order Number Package Marking NS Package Number Transport Media LM40CIMT LM40 CIMT MTC14C 94 units per rail LM40CIMTX LM40 CIMT MTC14C 2500 units in tape and reel Pin Description Pin Number Pin Name Description Typical Connection 1, 14 NC No Connect May be tied to V+, GND or left floating 2 GND Ground System ground 3 V+/+3.3V_SBY Positive power supply pin as well as a +3.3V voltage monitor Connected system 3.3 V standby power and to a 0.1 µF bypass capacitor in parallel with 100 pF. A bulk capacitance of approximately 10 µF needs to be in the near vicinity of the LM40. 4 SWD SensorPath Bus line; Open-drain output Super I/O, Pull-up resistor, 1.6k 5 ADD Digital input - device number select input for the serial bus device number Pull-up to 3.3 V or pull-down to GND resistor, 10k; must never be left floating 6 +1.2V +1.2V voltage monitoring input with scaling resistors Processor core voltage to be monitored 7 +2.5V +2.5V voltage monitoring input with scaling resistors Power supply voltage to be monitored 8, 10 D1-, D2- Thermal diode analog voltage output and negative monitoring input Remote Thermal Diode cathode (THERM_DC) - Diode 1 should always be connected to the processor thermal diode. Diode 2 may be connected to an MMBT3904 or GPU thermal diode. A 100 pF capacitor should be connected between respective D- and D+ for noise filtering. 9, 11 D1+, D2+ Thermal diode analog current output and positive monitoring input Remote Thermal Diode anode (THERM_DA) - Diode 1 should always be connected to the processor thermal diode. Diode 2 may be connected to an MMBT3904 or GPU thermal diode. A 100 pF capacitor should be connected between respective D- and D+ for noise filtering. 12 +5V +5V voltage monitoring input with scaling resistors Power supply voltage to be monitored 13 +12V +12V voltage monitoring input with scaling resistors Power supply voltage to be monitored www.national.com 2 |
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