19-1484; Rev 0; 4/99
SOT Temperature Sensors with
Period/Frequency Output
General Description
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 (擄K).
The MAX6577 converts the ambient temperature into a
square wave with a frequency proportional to absolute
temperature. The MAX6576 offers accuracy of 鹵3擄C at
+25擄C, 鹵4.5擄C at +85擄C, and 鹵5擄C at +125擄C. The
MAX6577 offers accuracy of 鹵3擄C at +25擄C, 鹵3.5擄C at
+85擄C, and 鹵4.5擄C at +125擄C.
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
time-select pins (TS0, TS1) to either V
DD
or GND. The
MAX6576/MAX6577 are available in space-saving 6-pin
SOT23 packages.
o
Simple Single-Wire Output
o
Two Output Types Available
Temperature to Period (碌s) (MAX6576)
Temperature to Frequency (Hz) (MAX6577)
o
鹵0.8擄C Accuracy at +25擄C (鹵3擄C max)
o
No External Components
o
Operates from +2.7V to +5.5V Supply Voltage
o
Low 140碌A Typical Supply Current
o
Standard Operating Temperature Range:
-40擄C to +125擄C
o
Small 6-Pin SOT23 Package
Features
MAX6576/MAX6577
Applications
Critical 碌P and 碌C Temperature Monitoring
Portable Battery-Powered Equipment
Cell Phones
Battery Packs
Hard Drives/Tape Drives
Networking and Telecom Equipment
Medical Equipment
Automotive
MAX6576ZUT
-40擄C to +125擄C
MAX6577ZUT
-40擄C to +125擄C
PART
Ordering Information
TEMP. RANGE
PIN-
PACKAGE
6 SOT23
6 SOT23
SOT
TOP MARK
AABI
AABJ
Pin Configuration
TOP VIEW
+2.7V TO +5.5V
0.1碌F
V
DD
1
6
OUT
Typical Operating Circuit
V
DD
0.1碌F
V
CC
GND
2
MAX6576
MAX6577
5
TS1
MAX6576
MAX6577
TS1
TS0
GND
OUT
碌P
GND
I/O
N.C.
3
4
TS0
SOT23-6
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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.