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MAX6502CMP070-T Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX6502CMP070-T
Description  Low-Cost, 2.7V to 5.5V, Micropower Temperature Switches in SOT23 and TO-220
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX6502CMP070-T Datasheet(HTML) 4 Page - Maxim Integrated Products

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Low-Cost, +2.7V to +5.5V, Micropower
Temperature Switches in SOT23 and TO-220
4
_______________________________________________________________________________________
Pin Description
1, 2
1, 2
Ground. Not internally connected. Tie both ground pins togeth-
er close to the chip. Pin 2 provides the lowest thermal resis-
tance to the die.
1, 2
PIN
1, 2
GND
3
3
Hysteresis Input. Connect HYST to GND for +2°C hysteresis, or
connect to VCC for +10°C hysteresis.
3
3
HYST
4
4
Supply Input (+2.7V to +5.5V)
5
Open-Drain, Active-Low Output. TOVER goes low when the die
temperature exceeds the factory-programmed temperature
threshold. Connect to a 100k
Ω pull-up resistor. May be pulled
up to a voltage higher than VCC.
TOVER
4
4
VCC
5
Push-Pull Active-High Output. TOVER goes high when the die tem-
perature exceeds the factory-programmed temperature threshold.
Open-Drain, Active-Low Output. TUNDER goes low when the
die temperature goes below the factory-programmed tempera-
ture threshold. Connect to a 100k
Ω pull-up resistor. May be
pulled up to a voltage higher than VCC.
5
TUNDER
Push-Pull Active-High Output. TUNDER goes high when the die tem-
perature falls below the factory-programmed temperature threshold.
5
TUNDER
TOVER
MAX6502
MAX6501
MAX6503
MAX6504
NAME
FUNCTION
________________General Description
The MAX6501–MAX6504 fully integrated temperature
switches incorporate two temperature-dependent refer-
ences and a comparator. One reference exhibits a pos-
itive temperature coefficient and the other a negative
temperature coefficient (Figure 1). The temperature at
which the two reference voltages are equal determines
the temperature trip point. Pin-selectable +2°C or
+10°C hysteresis keeps the output from oscillating
when the die temperature approaches the threshold
temperature. The MAX6501/MAX6503 have an active-
low, open-drain output structure that can only sink cur-
rent. The MAX6502/MAX6504 have an active-high,
push-pull output structure that can sink or source cur-
rent. The internal power-on reset circuit guarantees the
output is at TTH = +25°C state at start-up for 50µs.
The MAX6501–MAX6504 are available with factory-
preset temperature thresholds from -45°C to +115°C in
10°C increments. Table 1 lists the available temperature
threshold ranges. The MAX6501/MAX6503 outputs are
intended to interface with a microprocessor (µP) reset
input (Figure 2). The MAX6502/MAX6504 outputs are
intended for applications such as driving a fan control
(Figure 3).
Hysteresis Input
The HYST pin is a CMOS-compatible input that selects
hysteresis at either a high level (+10°C for HYST = VCC)
or a low level (+2°C for HYST = GND). Hysteresis pre-
vents the output from oscillating when the temperature
approaches the trip point. The HYST pin should not
float. Drive HYST close to ground or VCC. Other input
voltages cause increased supply current. The actual
amount of hysteresis depends on the part’s pro-
grammed trip threshold. (See the Typical Operating
Characteristics graphs.)
Table 1. Factory-Programmed Threshold
Range
+35°C < TTH < +115°C
+35°C < TTH < +115°C
THRESHOLD (TTH) RANGE
-45°C < TTH < +15°C
-45°C < TTH < +15°C
MAX6503
MAX6504
MAX6501
MAX6502
PART


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