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Description: The MAX7500MAX7504 temperature sensors accurately measure temperature and provide an overtemperature a...


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MAX7504 General Description


The MAX7500MAX7504 temperature sensors accurately measure temperature and provide an overtemperature alarm/interrupt/shutdown output. These devices convert the temperature measurements to digita form using a high-resolution, sigma-delta, analog-todigital 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 MAX7501MAX7504 feature two address select lines and a 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 MAX7500MAX7504 are available in 8-pin µMAX® and SO packages and operate over the -55°C to +125°C temperature range.

MAX7504 Maximum Ratings

(Note 1)
+VS to GND ........................................................... -0.3V to +6V
OS, SDA, SCL to GND.......................................... -0.3V to +6.0V
All Other Pins to GND................................ -0.3V to (+VS + 0.3V)
Input Current at Any Pin (Note 2) .................................... +5mA
Package Input Current (Note 2) ..................................... +20mA
ESD Protection (all pins, Human Body Model, Note 3)... ±2000V
Continuous Power Dissipation (TA = +70°C)
8-Pin µMAX (derate 4.5mW/°C above +70°C) ............ 362mW
8-Pin SO (derate 5.9mW/°C above +70°C)................. 471mW
Operating Temperature Range ...................  -55°C to +125°C
Junction Temperature .................................................. +150°C
Storage Temperature Range ....................... -65°C to +150°C
Lead Temperature (soldering, 10s) ............................. +300°C
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its rated operating conditions.
Note 2: When the input voltage (VI) at any pin exceeds the power supplies (VI < GND or VI > + VS), the current at that pin should be limited to 5mA. The 20mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5mA to 4.
Note 3: Human Body Model, 100pF discharged through a 1.5kΩ resistor.

MAX7504 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
· ±2°C (max) from -25°C to +100°C Temperature Accuracy
· µMAX, SO Packages Save Space
· Separate Open-Drain OS Output Operates as Interrupt or Comparator/Thermostat Input
· Register Readback Capability
· Improved LM75 Second Source
· UL Certified

MAX7504 Typical Application

·PCs
·Servers
·Office Electronics
·Electronic Test Equipment
·Industrial Process Control

MAX7504 Connection Diagram

MAX7504  Connection Diagram

MAX7504 datasheet

MAX7504
PDF/DataSheet Download

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