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MAX7504：Digital Temperature Sensors and Thermal Watchdog with Bus Lockup Protection

Digital Temperature Sensors and Thermal Watchdog with Bus-Lockup Protection and Manual Reset

The MAX7500–MAX7504 temperature sensors accurately measure temperature and provide an overtemperature alarm/interrupt/shutdown output. These devices convert the temperature measurements to digital form using a high-resolution, sigma-delta, analog-to-digital converter (ADC). Communication is through an I²C-compatible 2-wire serial interface. The MAX7500/MAX7501/MAX7502 integrate a timeout feature that offers protection against I²C bus lockups. The MAX7503/MAX7504 do not include the timeout feature. The 2-wire serial interface accepts standard write byte, read byte, send byte, and receive byte commands to read the temperature data and configure the behavior of the open-drain overtemperature shutdown output. The MAX7500 features three address select lines, while the MAX7501–MAX7504 feature two address select lines and an active-low RESET input. The MAX7500/MAX7501/MAX7502s' 3.0V to 5.5V supply voltage range, low 250µA supply current, and a lockup-protected I²C-compatible interface make them ideal for a wide range of applications, including personal computers (PCs), electronic test equipment, and office electronics. The MAX7500–MAX7504 are available in 8-pin µMAX® and SO packages and operate over the -55°C to +125°C temperature range.

Key Features Timeout Prevents Bus Lockup (MAX7500, MAX7501, MAX7502) Hardware Reset for Added Protection I²C Bus Interface 3.0V to 5.5V Supply Voltage Range 250µA (typ) Operating Supply Current 3µA (typ) Shutdown Supply Current ±1.5°C (max) Temperature Accuracy (-25°C to +100°C, 3-σ) µMAX, SO Packages Save Space Separate Open-Drain OS Output Operates as Interrupt or Comparator/Thermostat Input Register Readback Capability Improved LM75 Second Source

MAX7500, MAX7501, MAX7502, MAX7503, MAX7504: Typical Application Circuit Applications/Uses Electronic Test Equipment Industrial Process Control Office Electronics PCs Servers

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Design kits & evaluation modules

• MAX7500EVKIT

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