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Maxim Integrated - Remote/Local Temperature Sensor with SMBus Serial Interface

Numéro de référence MAX1617MEE
Description Remote/Local Temperature Sensor with SMBus Serial Interface
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX1617MEE fiche technique
19-1265; Rev 1; 3/98
EVAALVUAAILTAIOBNLEKIT
Remote/Local Temperature Sensor
with SMBus Serial Interface
________________General Description
The MAX1617 (patents pending) is a precise digital
thermometer that reports the temperature of both a
remote sensor and its own package. The remote sensor
is a diode-connected transistor—typically a low-cost,
easily mounted 2N3904 NPN type—that replaces con-
ventional thermistors or thermocouples. Remote accu-
racy is ±3°C for multiple transistor manufacturers, with
no calibration needed. The remote channel can also
measure the die temperature of other ICs, such as
microprocessors, that contain an on-chip, diode-con-
nected transistor.
The 2-wire serial interface accepts standard System
Management Bus (SMBus™) Write Byte, Read Byte,
Send Byte, and Receive Byte commands to program the
alarm thresholds and to read temperature data. The data
format is 7 bits plus sign, with each bit corresponding to
1°C, in twos-complement format. Measurements can be
done automatically and autonomously, with the conver-
sion rate programmed by the user or programmed to
operate in a single-shot mode. The adjustable rate allows
the user to control the supply-current drain.
The MAX1617 is available in a small, 16-pin QSOP sur-
face-mount package.
________________________Applications
Desktop and Notebook
Computers
Central Office
Telecom Equipment
Smart Battery Packs
Test and Measurement
LAN Servers
Multi-Chip Modules
Industrial Controls
___________________Pin Configuration
____________________________Features
o Two Channels: Measures Both Remote and Local
Temperatures
o No Calibration Required
o SMBus 2-Wire Serial Interface
o Programmable Under/Overtemperature Alarms
o Supports SMBus Alert Response
o Accuracy:
±2°C (+60°C to +100°C, local)
±3°C (-40°C to +125°C, local)
±3°C (+60°C to +100°C, remote)
o 3µA (typ) Standby Supply Current
o 70µA (max) Supply Current in Auto-Convert Mode
o +3V to +5.5V Supply Range
o Small, 16-Pin QSOP Package
_______________Ordering Information
PART*
MAX1617MEE
TEMP. RANGE
-55°C to +125°C
*U.S. and foreign patents pending.
PIN-PACKAGE
16 QSOP
__________Typical Operating Circuit
TOP VIEW
N.C. 1
VCC 2
DXP 3
DXN 4
N.C. 5
ADD1 6
GND 7
GND 8
MAX1617
QSOP
16 N.C.
15 STBY
14 SMBCLK
13 N.C.
12 SMBDATA
11 ALERT
10 ADD0
9 N.C.
2N3904
0.1µF
3V TO 5.5V
200
VCC STBY
MAX1617
DXP SMBCLK
SMBDATA
DXN
2200pF
ALERT
ADD0 ADD1 GND
10k EACH
CLOCK
DATA
INTERRUPT
TO µC
SMBus is a trademark of Intel Corp.
Patents Pending
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.

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