19-1485; Rev 0; 4/99
S OT Te m p e ra t u re S e n s o r w it h
Mu lt id ro p S in g le -Wire Dig it a l In t e rfa c e
MAX675L/H
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX6575L/H is a low-cost, low-current temperature
sensor with a single-wire digital interface. It features
accuracy of ±3°C at +25°C, ±4.5°C at +85°C, and ±5°C
at +125°C. The MAX6575L/H is a monostable, externally
triggered temperature sensor that allows a microproces-
sor (µP) to interface with up to eight temperature sen-
s ors us ing a s ing le c ontrol line . Te mp e ra ture s a re
sensed by measuring the time delay between the falling
edge of the external triggering pulse and the falling
edge of the subsequent pulse delays reported from the
devices. Different sensors on the same I/O line use dif-
ferent timeout multipliers to avoid overlapping signals.
♦ Simple Single-Wire Interface to µP or µC
♦ Multidrop up to Eight Sensors on One Wire
♦ ±0.8°C Accuracy at +25°C (±3°C max)
♦ Operates from +2.7V to +5.5V Supply Voltage
♦ Low 150µA (typ) Supply Current
♦ Standard Operating Temperature Range:
-40°C to +125°C
♦ Small 6-Pin SOT23 Package
The MAX6575L/H features eight different timeout multi-
pliers; these are selectable by using the two time-select
pins on each device and choosing the “L” or “H” ver-
sion. The “L” version provides four delay ranges less
than 50ms. The “H” version provides four delay ranges
greater than 50ms. The MAX6575L/H is available in a
space-saving 6-pin SOT23 package.
Ord e rin g In fo rm a t io n
SOT
TOP MARK
PIN-
PACKAGE
PART
TEMP. RANGE
MAX6575LZUT -40°C to +125°C 6 SOT23
MAX6575HZUT -40°C to +125°C 6 SOT23
AABG
AABH
Ap p lic a t io n s
Critical µP and µC Temperature Monitoring
Portable Battery-Powered Equipment
Cell Phones
S e le c t o r Gu id e
TIMEOUT MULTIPLIERS
(µs/°K)
PART
Battery Packs
MAX6575L
MAX6575H
5, 20, 40, 80
Hard Drives/Tape Drives
160, 320, 480, 640
Networking and Telecom Equipment
Medical Equipment
Pin Configurations appear at end of data sheet.
Automotive
Typ ic a l Op e ra t in g Circ u it
+2.7V TO +5.5V
V
CC
0.1µF
0.1µF
V
DD
V
DD
0.1µF
MAX6575L
CHIP #1
MAX6575H
CHIP #8
TS1
TS0
TS1
TS0
V
CC
10k
GND
GND
I/O
I/O
µP
I/O
GND
________________________________________________________________ Maxim Integrated Products
1
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