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MAX6577ZUT-T

P1-P3P4-P6P7-P8
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.
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.
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
♦ 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
♦ Standard Operating Temperature Range:
-40°C to +125°C
♦ Small 6-Pin SOT23 Package
MAX6576/MAX6577
SOT Temperature Sensors with
Period/Frequency Output
________________________________________________________________
Maxim Integrated Products
1
+2.7V TO +5.5V
GND
TS0
TS1
OUT
0.1µF
0.1µF
V
DD
MAX6576
MAX6577
µP
GND
I/O
V
CC
19-1484; Rev 0; 4/99
PART
MAX6576ZUT
MAX6577ZUT
-40°C to +125°C
-40°C to +125°C
TEMP. RANGE
PIN-
PACKAGE
6 SOT23
6 SOT23
Typical Operating Circuit
Ordering Information
SOT
TOP MARK
AABI
AABJ
GND
TS0N.C.
16OUT
5 TS1
V
DD
MAX6576
MAX6577
SOT23-6
TOP VIEW
2
34
Pin Configuration
MAX6576/MAX6577
SOT Temperature Sensors with
Period/Frequency Output
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are specified at T
A
= +25°C and V
DD
= +5V,
unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: See the Temperature Accuracy histograms in the
Typical Operating Characteristics
.
Note 2: The output duty cycle is guaranteed to be 50% by an internal flip-flop.
Terminal Voltage (with respect to GND)
V
DD
......................................................................-0.3V to +6V
TS1, TS0, OUT.......................................-0.3V to (V
DD
+ 0.3V)
Input/Output Current, All Pins...........................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
6-pin SOT23 (derate 7.10mW/°C above +70°C).........571mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
MAX6576
V
DD
= 5.5V
V
DD
> 2.7V, I
SINK
= 1.2mA
V
DD
> 4.5V, I
SINK
= 3.2mA
MAX6576,
T (temp) in °K,
Figure 1
MAX6577
CONDITIONS
0.3
V
0.4
V
OL
OUT Voltage
2.3V
IH
V
0.8V
IL
Time-Select Pin Logic
Levels
0.5OUT Duty Cycle (Note 2)
640T
°C
-7.5 ±1.1 +7.5
Temperature Sensor
Error (Note 1)
µA
140 250
I
DD
V2.7 5.5V
DD
V
DD
Range
Supply Current
160T
40T
µs
10T
t
OUT
Output Clock Period
-3.0 ±0.8 +3.0
-5.5 ±0.9 +5.5
-3.0 ±0.8 +3.0
-7.5 ±1.1 +7.5
-6.5 ±0.9 +6.5
UNITSMIN TYP MAXSYMBOLPARAMETER
T
A
= -20°C
T
A
= 0°C
T
A
= +25°C
T
A
= -20°C
T
A
= 0°C
T
A
= +25°C
V
TS1
= V
DD
, V
TS0
= V
DD
MAX6577,
T (temp) in °K,
Figure 2
V
TS1
= V
DD
, V
TS0
= V
DD
T/16
T/4
1T
Hz
4T
f
OUT
Output Clock Frequency
V
DD
> 4.5V, I
SRC
= 800µA V
DD
- 1.5
V
OH
V
DD
> 2.7V, I
SRC
= 500µA 0.8V
DD
V
TS1
= GND, V
TS0
= GND
V
TS1
= GND, V
TS0
= V
DD
V
TS1
= V
DD
, V
TS0
= GND
V
TS1
= GND, V
TS0
= GND
V
TS1
= GND, V
TS0
= V
DD
V
TS1
= V
DD
, V
TS0
= GND
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C 400
°C
-3.5 ±0.5 +3.5T
A
= +85°C
-4.5 ±0.5 +4.5T
A
= +125°C
T
A
= +85°C -4.5 ±0.5 +4.5
T
A
= +125°C -5.0 ±0.5 +5.0
MAX6576/MAX6577
SOT Temperature Sensors with
Period/Frequency Output
_______________________________________________________________________________________
3
0
10
5
15
20
25
30
35
-5 -3 -2-4 -1012345
TEMPERATURE ACCURACY
(T
A
= +25°C)
MAX6576 toc01
ACCURACY (°C)
PERCENTAGE OF PARTS SAMPLED (%)
MAX6576
MAX6577
SAMPLE SIZE = 200
0
20
10
30
40
50
60
-5 -3 -2-4 -1012345
TEMPERATURE ACCURACY
(T
A
= +85°C)
MAX6576 toc01
ACCURACY (°C)
PERCENTAGE OF PARTS SAMPLED (%)
MAX6576
MAX6577
SAMPLE SIZE = 200
100
130
120
110
150
140
170
160
180
-40 -10 5 20-25 35 50 65 80 95 110 125
SUPPLY CURRENT vs. TEMPERATURE
MAX6576/77toc02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
MAX6577
MAX6576
-1.0
0
-0.5
1.0
0.5
1.5
-40 -10 5 20-25 35 50 65 80 95 110 125
ACCURACY vs. TEMPERATURE
MAX6575 toc04
TEMPERATURE (°C)
ACCURACY (°C)
MAX6576
MAX6577
+15°C/div
+100°C
+25°C
THERMAL STEP RESPONSE
IN PERFLUORINATED FLUID
MAX6576/77 toc05
5sec/div
MOUNTED ON 0.75 in.
2
OF 2oz. COPPER
+12.5°C/div
+100°C
+25°C
THERMAL STEP RESPONSE
IN STILL AIR
MAX6576/77 toc06
20sec/div
MOUNTED ON 0.75 in.
2
OF 2oz. COPPER
Typical Operating Characteristics
(V
DD
= +5V, T
A
= +25°C, unless otherwise noted.)
P1-P3P4-P6P7-P8

MAX6577ZUT-T

Mfr. #:
Buy MAX6577ZUT-T
Manufacturer:
Maxim Integrated
Description:
SENSOR DIGITAL -40C-125C SOT23-6
Lifecycle:
New from this manufacturer.
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