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LM27 Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LM27 Datasheet(HTML) 2 Page - National Semiconductor (TI) |
2 / 9 page Ordering Information For more detailed information on the suffix meaning see the part number template at the end of the Electrical Characteris- tics Section. Contact National Semiconductor for other set points and output options. Order Number Top Mark NS Package Number Trip Point Setting Output Function Bulk Rail 3000 Units in Tape & Reel LM27CIM5-1HJ LM27CIM5X-1HJ T1HJ MA05B 130˚C Open Drain OS LM27CIM5-2HJ LM27CIM5X-2HJ T2HJ MA05B 140˚C Open Drain OS Connection Diagram 20030702 Pin Description Pin Number Pin Name Function Connection 1 HYST Hysteresis control, digital input GND for 10˚C or V + for 2˚C 2 GND Ground, connected to the back side of the die through lead frame. System GND 3V TEMP Analog output voltage proportional to temperature Leave floating or connect to a high impedance node. 4V + Supply input 2.7V to 5.5V with a 0.1µF bypass capacitor. For PSRR information see Section Titled NOISE CONSIDERATIONS. 5OS Overtemperature Shutdown open-drain active low thermostat digital output Controller interrupt, system or power supply shutdown; pull-up resistor ≥ 10kΩ OS Overtemperature Shutdown totem-pull active high thermostat digital output Controller interrupt, system or power supply shutdown US Undertemperature Shutdown open-drain active low thermostat digital output System or power supply shutdown; pull-up resistor ≥ 10kΩ US Undertemperature Shutdown totem-pull active high thermostat digital output System or power supply shutdown Note: pin 5 functionality and trip point setting are programmed during LM27 manufacture. www.national.com 2 |
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