MAX6576 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – SOT Temperature Sensors with Period/Frequency Output

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 (°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.
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.
Features
o Simple Single-Wire Output
o Two Output Types Available
Temperature to Period (µs) (MAX6576)
Temperature to Frequency (Hz) (MAX6577)
o ±0.8°C Accuracy at +25°C (±3°C max)
o No External Components
o Operates from +2.7V to +5.5V Supply Voltage
o Low 140µA Typical Supply Current
o Standard Operating Temperature Range:
-40°C to +125°C
o Small 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
Ordering Information
PART
TEMP. RANGE
MAX6576ZUT -40°C to +125°C
MAX6577ZUT -40°C to +125°C
PIN-
PACKAGE
6 SOT23
6 SOT23
SOT
TOP MARK
AABI
AABJ
Pin Configuration
Typical Operating Circuit
TOP VIEW
V_DD 1
6 OUT
MAX6576
GND 2 _MAX6577 5 TS1
N.C. 3
4 TS0
SOT23-6
+2.7V TO +5.5V
0.1µF
V_DD
0.1µF
MAX6576
TS1 ^MAX6577
TS0
GND
OUT
V_CC
µP
GND
I/O
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