MAX6509HAUK+T Maxim Integrated Products, MAX6509HAUK+T Datasheet - Page 7

• Manufacturer Part Number: MAX6509HAUK+T
• Description: IC TEMP SWITCH RES-PROG SOT23-5
• Manufacturer: Maxim Integrated Products

Specifications of MAX6509HAUK+T

• Function: Temp Switch
• Topology: Comparator, Voltage Reference
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: Active Low/Open Drain
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Full Temp Accuracy: +/- 0.5 C
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

mal shutdown, power-up, recalibration, or other tem-
perature-dependent function.
In high-performance/high-reliability applications, multi-
ple temperature monitoring is important. The high-level
integration and low cost of the MAX6509/MAX6510
facilitate the use of multiple temperature monitors to
increase system reliability. Figure 6 shows two
MAX6510s with different temperature thresholds. This
ensures that fault conditions that can overheat the mon-
itored device cause no permanent damage. The first
temperature monitor activates the fan when the die
temperature exceeds +45°C. The second MAX6510
triggers a system shutdown if the die temperature
reaches +75°C. The second temperature monitor’s out-
put asserts when a wide variety of destructive fault con-
ditions occur, including latchups, short circuits, and
cooling-system failures.
Figure 5. Temperature-Window Detector
R
30k
SET
Low-Cost, Fail-Safe Temperature Monitor
+5V
V
V
GND
HYST
HYST
CC
CC
GND
+5V
MAX6509CAUT
MAX6510HAUT
MAX6509HAUK
OUTSET
GND
V
V
CC
CC
OUTSET
_______________________________________________________________________________________
OUT
OUT
HYST
SET
OUT
UNDERTEMP
V
CC
R
R
100k
30k
SET
SET
R
100k
OVERTEMP
PULL-UP
OUT
GND
MAX6509CAUK
HYST
V
CC
OUT OF RANGE
OUT OF RANGE
SET
SOT Temperature Switches
100k
R
SET
Resistor-Programmable
To set the trip-point temperature, connect a resistor
between SET and GND. The resistor’s value is deter-
mined either from the R
(see Typical Operating Characteristics) or from the
equations below.
To set the temperature trip point from -40°C to 0°C, use
the following equation:
To set the temperature trip point from 0°C to +125°C,
use the following equation:
where T is the trip temperature in Kelvin.
Figure 6. Low-Power, High-Reliability, Fail-Safe Temperature
Monitor
TRANSISTOR COUNT: 234
R
SET(kΩ)
R
SET(kΩ)
µP
= [(1.3258 · 10
[(5.7797 · 10
= [(8.3793 · 10
HEAT
HEAT
[(1.2989 · 10
+5V
R
55k
SET
SET
Chip Information
5
6
) / (T+1.3)] - 310.1693 -
) / (T+1.3)
V
V
GND
HYST
SET
vs. Temperature graphs
CC
CC
4
5
) / T] - 211.3569 +
MAX6510HAUT
MAX6510HAUT
) / T
Set-Point Resistor
HYST
GND
2
]
OUTSET
OUTSET
2
OUT
OUT
]
SET
R
30k
SET
TEMPERATURE
CONTROL
FAULT
FAN
V
V
CC
CC
7