19-1484; Rev 0; 4/99
S OT Te m p e ra t u re S e n s o rs w it h
P e rio d /Fre q u e n c y Ou t p u t
/MAX657
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX6576/MAX6577 are low-cost, low-current tem-
perature sensors with a single-wire output. The MAX6576
converts the ambient temperature into a square wave
with a period proportional to absolute temperature (°K).
The MAX6577 converts the ambient temperature into a
square wave with a frequency proportional to absolute
temperature. The MAX6576 offers accuracy of ±3°C at
+25°C, ±4.5°C at +85°C, and ±5°C at +125°C. The
MAX6577 offers accuracy of ±3°C at +25°C, ±3.5°C at
+85°C, and ±4.5°C at +125°C.
♦ Simple Single-Wire Output
♦ Two Output Types Available
Temperature to Period (µs) (MAX6576)
Temperature to Frequency (Hz) (MAX6577)
♦ ±0.8°C Accuracy at +25°C (±3°C max)
♦ No External Components
♦ Operates from +2.7V to +5.5V Supply Voltage
♦ Low 140µA Typical Supply Current
Both devices feature a single-wire output that minimizes
the number of pins necessary to interface with a micro-
processor. The period/frequency range of the output
square wave can be selected by hard-wiring the two
♦ Standard Operating Temperature Range:
-40°C to +125°C
♦ Small 6-Pin SOT23 Package
time-select pins (TS0, TS1) to either V
or GND. The
DD
MAX6576/MAX6577 are available in space-saving 6-pin
SOT23 packages.
Ap p lic a t io n s
Ord e rin g In fo rm a t io n
Critical µP and µC Temperature Monitoring
Portable Battery-Powered Equipment
Cell Phones
PIN-
SOT
PART
TEMP. RANGE
PACKAGE TOP MARK
MAX6576ZUT -40°C to +125°C 6 SOT23
MAX6577ZUT -40°C to +125°C 6 SOT23
AABI
AABJ
Battery Packs
Hard Drives/Tape Drives
Networking and Telecom Equipment
Medical Equipment
Automotive
Typ ic a l Op e ra t in g Circ u it
P in Co n fig u ra t io n
TOP VIEW
+2.7V TO +5.5V
0.1µF
0.1µF
V
DD
V
CC
V
1
2
3
6
5
4
OUT
TS1
TS0
DD
µP
MAX6576
MAX6577
MAX6576
MAX6577
GND
N.C.
TS1
TS0
GND
GND
OUT
I/O
SOT23-6
________________________________________________________________ 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 1-800-835-8769.