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MAX6514 Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX6514 Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 8 page Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 4 _______________________________________________________________________________________ Pin Description Detailed Description The MAX6514/MAX6515 fully integrated temperature switches incorporate a fixed reference, an analog tem- perature sensor, and a comparator. Pin-selectable 2°C or 10°C hysteresis keeps the digital output from oscil- lating when the die temperature approaches the threshold temperature. The MAX6514 has an active- high, push-pull output structure that can sink or source current. The MAX6515 has an active-low, open-drain output structure that can only sink current. The internal power-on reset circuit guarantees the logic output is at its +25°C state for at least 50µs. Hysteresis Input The HYST input selects the devices’ temperature hys- teresis and prevents the output from oscillating when the temperature approaches the trip point. Connect HYST to VCC for 2°C hysteresis or to GND for 10°C hysteresis. Logic Temperature Indicators Overtemperature Indicator (Hot Thresholds) TOVER and TOVER designations apply to thresholds above TA = +25°C (+35°C, +45°C, +55°C, +65°C, +75°C, +85°C, +95°C, +105°C, and +115°C). All “hot” thresholds are positive temperatures. The overtemperature indicator output is open drain active low (TOVER) or push-pull active high (TOVER). TOVER goes low when the die temperature exceeds the factory-programmed temperature threshold. TOVER should be pulled up to a voltage no greater than 5.5V with a 100k Ω pullup resistor. TOVER is a push-pull active-high CMOS output that goes high when the die temperature exceeds the factory-programmed temper- ature threshold. Undertemperature Indicator (Cold Thresholds) TUNDER and TUNDER designations apply to thresh- olds below TA = +25°C (+15°C, +5°C, -5°C, -15°C, -25°C, -35°C, -45°C). The undertemperature indicator output is open-drain, active low (TUNDER) or push-pull, active high (TUNDER). TUNDER goes low when the die temperature goes below the factory-programmed tem- perature threshold. TUNDER should be pulled up to a voltage no greater than 5.5V with a 100k Ω pullup resis- tor. TUNDER is a push-pull active-high CMOS output that goes high when the die temperature falls below the factory-programmed temperature threshold. PIN MAX6514 MAX6515 NAME FUNCTION 1, 2 1, 2 GND Ground 3 3 HYST Hysteresis Input. Connect to VCC for 2°C of hysteresis or to GND for 10°C hysteresis. 44 VCC Input Supply. Bypass to ground with a 0.1µF capacitor. 5 — TOVER Push-Pull Active-High Output (Hot Threshold). TOVER goes high when the die temperature exceeds the factory-programmed hot-temperature threshold. —5 TOVER Open-Drain, Active-Low Output (Hot Threshold). TOVER goes low when the die temperature exceeds the factory-programmed hot-temperature threshold. Connect to a 100k Ω pullup resistor. Can be pulled up to a voltage higher than VCC. 5 — TUNDER Push-Pull Active-High Output (Cold Threshold). TUNDER goes high when the die temperature falls below the factory-programmed cold-temperature threshold. —5 TUNDER Open-Drain, Active-Low Output (Cold Threshold). TUNDER goes low when the die temperature goes below the factory-programmed cold-temperature threshold. Connect to a 100k Ω pullup resistor. Can be pulled up to a voltage higher than VCC. |
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