Rainbow Electronics MAX7502 - Manual

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 I
2 C
-compatible 2-wire serial interface. The
MAX7500/MAX7501/MAX7502 integrate a timeout fea-
ture that offers protection against I
2 C 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 I
2 C-
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
♦ Timeout Prevents Bus Lockup
♦ I
2 C 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
MAX7500/MAX7501/MAX7502
Digital Temperature Sensors and Thermal
Watchdog with Bus Lockup Protection
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
8
7
6
5
+V S
A0
A1
A2 GND
OS
SCL
SDA
MAX7500
µMAX, SO
1
2
3
4
8
7
6
5
+V S
A0
A1
RESET GND
OS
SCL
SDA
MAX7501
MAX7502
µMAX, SO
TOP VIEW
Pin Configurations
Ordering Information
19-3382; Rev 0; 8/04
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.
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
Purchase of I 2 C components of Maxim Integrated Products
Inc., or one of its sublicensed Associated Companies, conveys
a license under Philips I
2 C Patent Rights to use these compo-
nents in an I 2 C system, provided that the system conforms to
the I 2 C Standard Specification as defined by Philips.
*Future product—contact factory for availability.
I 2 C is a trademark of Philips Corp.
µMAX is a registered trademark of Maxim Integrated
Products, Inc.