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MAX1668-MAX1989

Description
DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT
CategoryThe sensor   
File Size232KB,17 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric View All

MAX1668-MAX1989 Overview

DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT

MAX1668-MAX1989 Parametric

Parameter NameAttribute value
Maximum supply voltage5.5 V
Minimum supply voltage3 V
Maximum operating temperature125 Cel
Minimum operating temperature0.0 Cel
Maximum accuracy3
Processing package description4.40 MM, TSSOP-16
stateACTIVE
outer coverplastic
high1.1 mm
width4.4 mm
terminal coatingtin lead
Installation featuressurface mount
Terminal typewelding
Working current0.0100 mA
type of packagingRectangle
length or diameter5 mm
Number of digits8
Output interface type2-wire interface
sensor typeserial
19-1766; Rev 2; 5/03
Multichannel Remote/Local
Temperature Sensors
________________General Description
The MAX1668/MAX1805/MAX1989 are precise multi-
channel digital thermometers that report the tempera-
ture of all remote sensors and their own packages. The
remote sensors are diode-connected transistors—typi-
cally low-cost, easily mounted 2N3904 NPN types—that
replace conventional thermistors or thermocouples.
Remote accuracy is ±3°C for multiple transistor manu-
facturers, with no calibration needed. The remote chan-
nels can also measure the die temperature of other ICs,
such as microprocessors, that contain an on-chip,
diode-connected 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 for-
mat is 7 bits plus sign, with each bit corresponding to
1°C, in two’s-complement format.
The MAX1668/MAX1805/MAX1989 are available in
small, 16-pin QSOP surface-mount packages. The
MAX1989 is also available in a 16-pin TSSOP.
____________________________Features
o
Multichannel
4 Remote, 1 Local (MAX1668/MAX1989)
2 Remote, 1 Local (MAX1805)
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
700µA (max) Supply Current
o
Small, 16-Pin QSOP/TSSOP Packages
MAX1668/MAX1805/MAX1989
_______________Ordering Information
________________________Applications
Desktop and Notebook
Computers
LAN Servers
Industrial Controls
Central-Office Telecom
Equipment
Test and Measurement
Multichip Modules
PART
MAX1668MEE
MAX1805MEE
MAX1989MEE
MAX1989MUE
TEMP RANGE
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
PIN-PACKAGE
16 QSOP
16 QSOP
16 QSOP
16 TSSOP
Pin Configuration
TOP VIEW
DXP1 1
DXN1 2
DXP2 3
DXN2 4
(N.C.) DXP3 5
(N.C.) DXN3 6
(N.C.) DXP4 7
(N.C.) DXN4 8
16 GND
15 STBY
14 SMBCLK
Typical Operating Circuit
0.1µF
3V TO 5.5V
200Ω
V
CC
STBY
10kΩ EACH
MAX1668
MAX1805
MAX1989
MAX1668
MAX1805
MAX1989
13 SMBDATA
12 ALERT
11 ADD0
10 ADD1
9
V
CC
DXP1
2200pF
SMBCLK
SMBDATA
ALERT
CLOCK
DATA
INTERRUPT
TO
µC
*
DXN1
DXP4
2200pF
*
DXN4
ADD0 ADD1 GND
QSOP/TSSOP
( ) ARE FOR MAX1805.
*
DIODE-CONNECTED TRANSISTOR
†Patents
Pending
1
SMBus is a trademark of Intel Corp.
________________________________________________________________
Maxim Integrated Products
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.
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