MAX7500-MAX7502 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Digital Temperature Sensors and Thermal Watchdog with Bus Lockup Protection

19-3382; Rev 1; 10/04
Digital Temperature Sensors and Thermal
Watchdog with Bus Lockup Protection
General Description
The MAX7500/MAX7501/MAX7502 temperature sen-
sors accurately measure temperature and provide an
over-temperature alarm/interrupt/shutdown output.
These devices convert the temperature measurements
to digital form using a high-resolution, sigma-delta, ana-
log-to-digital converter (ADC). Communication is
through an I²C-compatible 2-wire serial interface. The
MAX7500/MAX7501/MAX7502 integrate a timeout fea-
ture that offers protection against I²C bus lockups.
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 over-temperature shutdown output.
The MAX7500 features three address select lines, while
the MAX7501 and MAX7502 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 MAX7500/MAX7501/MAX7502 are available in 8-
pin µMAX^® and SO packages and operate over the
-55°C to +125°C temperature range.
Applications
PCs
Servers
Office Electronics
Electronic Test Equipment
Industrial Process Control
Features
o Timeout Prevents Bus Lockup
o I²C Bus Interface
o 3.0V to 5.5V Supply Voltage Range
o 250µA (typ) Operating Supply Current
o 3µA (typ) Shutdown Supply Current
o ±2°C (max) from -25°C to +100°C Temperature
Accuracy
o µMAX, SO Packages Save Space
o Separate Open-Drain OS Output Operates as
Interrupt or Comparator/Thermostat Input
o Register Readback Capability
o Improved LM75 Second Source
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX7500MSA
-55°C to +125°C 8 SO
MAX7500MUA
-55°C to +125°C 8 µMAX
MAX7501MSA
-55°C to +125°C 8 SO
MAX7501MUA
-55°C to +125°C 8 µMAX
MAX7502MSA
-55°C to +125°C 8 SO
MAX7502MUA
-55°C to +125°C 8 µMAX
I²C is a trademark of Philips Corp.
Purchase of I²C components from Maxim Integrated Products
Inc., or one of its sublicensed Associated Companies, conveys
a license under Philips I²C Patent Rights to use these compo-
nents in an I²C system, provided that the system conforms to
the I²C Standard Specification as defined by Philips.
µMAX is a registered trademark of Maxim Integrated
Products, Inc.
TOP VIEW
SDA 1
SCL 2
OS 3
GND 4
MAX7500
8 +V_S
7 A0
6 A1
5 A2
µMAX, SO
Pin Configurations
SDA 1
SCL 2
OS 3
GND 4
MAX7501
MAX7502
8 +V_S
7 A0
6 A1
5 RESET
µMAX, SO
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.