EVALUATION KIT AVAILABLE
MAX1617A
Remote/Local Temperature Sensor
with SMBus Serial Interface
General Description
Features
The MAX1617A 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 conventional thermistors or
thermocouples. Remote accuracy 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-connected transistor.
● Two Channels: Measures Both Remote and Local
Temperatures
● No Calibration Required
● SMBus 2-Wire Serial Interface
● Programmable Under/Overtemperature Alarms
● Supports SMBus Alert Response
● Supports Manufacturer and Device ID Codes
● 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)
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
two’s complement format. Measurements can be done
automatically and autonomously, with the conversion 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.
● 3μA (typ) Standby Supply Current
● 70μA (max) Supply Current in Auto-Convert Mode
● +3V to +5.5V Supply Range
● Small 16-Pin QSOP Package
Ordering Information
The MAX1617A is nearly identical to the popular
MAX1617, but has improved SMBus timing specifications,
improved bus collision immunity, software manufacturer
and device identification available via the serial interface,
and a power-on reset function that can force a reset of the
slave address via the serial interface.
PART
PIN-PACKAGE
PIN-PACKAGE
MAX1617AMEE+
-55°C to +125°C
16 QSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Applications
● Desktop and Notebook
● Central Office
Typical Operating Circuit
Computers
Telecom Equipment
● Smart Battery Packs
● LAN Servers
● Test and Measurement
● Multichip Modules
3V TO 5.5V
0.1µF
● Industrial Controls
V
CC
STBY
Pin Configuration
10k EACH
MAX1617A
TOP VIEW
+
N.C.
1
2
3
4
5
6
7
8
16 N.C.
DXP
DXN
CLOCK
DATA
SMBCLK
V
CC
15 STBY
14 SMBCLK
SMBDATA
DXP
DXN
N.C.
MAX1617A
13 N.C.
INTERRUPT
TO µC
ALERT
2N3904
2200pF
12 SMBDATA
11 ALERT
10 ADD0
ADD0 ADD1 GND
ADD1
GND
GND
9
N.C.
QSOP
19-4508; Rev 2; 11/16