MAX7503: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
MAX7500, MAX7501, MAX7502, MAX7503, MAX7504: Typical Application Circuit
Applications/Uses
  • Electronic Test Equipment
  • Industrial Process Control
  • Office Electronics
  • PCs
  • Servers
DataSheet
titleDownload file
MAX7500-MAX7504 Data SheetMAX7500-MAX7504.pdf
Parametrics
Part NumberSensor TypeAlarm OutputFunctionsInterfaceChannelsAccuracy
(±°C)
Parasite Pwr.Temp. Thresh.Temp. Resolution
(bits)
Multi DroppableOper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
MAX7500Local--2-Wire/I2C/SMBusOne2NoProgrammable-Yes-55 to +125µMAX/8
SOIC(N)/8
TDFN-EP/8
$0.89 @1k
MAX7501OvertStandalone ThermostatNoProgrammable11µMAX/8
SOIC(N)/8
$1.03 @1k
MAX7502OvertStandalone ThermostatNoProgrammable11µMAX/8
SOIC(N)/8
$1.03 @1k
MAX7503OvertStandalone ThermostatNoProgrammable11µMAX/8
SOIC(N)/8
$1.03 @1k
MAX7504OvertSingle Temperature Alarm---µMAX/8
SOIC(N)/8
$1.03 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX7503MSANo Longer AvailableMAX7503MSA+SOIC(N),;8 pin;30.9 mm²-55°C to +125°CNo
MAX7503MSA+ActiveSOIC(N),;8 pin;30.9 mm²-55°C to +125°CLead Free
MAX7503MSA+TActiveSOIC(N),;8 pin;30.9 mm²-55°C to +125°CLead Free
MAX7503MSA-TNo Longer AvailableMAX7503MSA+TN.SO;8 pin-55°C to +125°CSee data sheet
MAX7503MUANo Longer AvailableMAX7503MUA+µMAX,;8 pin;15.6 mm²-55°C to +125°CNo
MAX7503MUA+ActiveµMAX,;8 pin;15.6 mm²-55°C to +125°CLead Free
MAX7503MUA+TActiveµMAX,;8 pin;15.6 mm²-55°C to +125°CLead Free
MAX7503MUA-TNo Longer AvailableMAX7503MUA+TuMAX;8 pin-55°C to +125°CSee data sheet
MAX7500-MAX7504.pdf MAX7504
Understanding Multidrop Address Assignments for Thermal Sensors MAX7504
MAX7500-MAX7504.pdf MAX7504