MAX6575L Datasheet, PDF (1/12 Pages) Maxim Integrated Products – SOT Temperature Sensor with Multidrop Single-Wire Digital Interface

19-1485; Rev 0; 4/99
SOT Temperature Sensor with
Multidrop Single-Wire Digital Interface
General Description
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-
sors using a single control line. Temperatures are
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.
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.
Applications
Critical µP and µC Temperature Monitoring
Portable Battery-Powered Equipment
Cell Phones
Battery Packs
Hard Drives/Tape Drives
Networking and Telecom Equipment
Medical Equipment
Automotive
Features
o Simple Single-Wire Interface to µP or µC
o Multidrop up to Eight Sensors on One Wire
o ±0.8°C Accuracy at +25°C (±3°C max)
o Operates from +2.7V to +5.5V Supply Voltage
o Low 150µA (typ) Supply Current
o Standard Operating Temperature Range:
-40°C to +125°C
o Small 6-Pin SOT23 Package
Ordering Information
PART
MAX6575LZUT
MAX6575HZUT
TEMP. RANGE
-40°C to +125°C
-40°C to +125°C
PIN-
SOT
PACKAGE TOP MARK
6 SOT23
AABG
6 SOT23
AABH
PART
MAX6575L
MAX6575H
Selector Guide
TIMEOUT MULTIPLIERS
(µs/°K)
5, 20, 40, 80
160, 320, 480, 640
Pin Configurations appear at end of data sheet.
Typical Operating Circuit
V_CC
0.1µF
V_CC
10k
µP
I/O
GND
0.1µF
V_DD
MAX6575L
TS1 _{CHIP #1}
TS0
GND
I/O
0.1µF
+2.7V TO +5.5V
V_DD
MAX6575H
TS1 _{CHIP #8}
TS0
GND
I/O
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