LM57BISD-5/NOPB National Semiconductor, LM57BISD-5/NOPB Datasheet - Page 17

• Manufacturer Part Number: LM57BISD-5/NOPB
• Description: IC, TEMPERATURE SW/SENSOR, ± 0.7°C, LLP8
• Manufacturer: National Semiconductor

Specifications of LM57BISD-5/NOPB

• Ic Output Type: Voltage
• Sensing Accuracy Range: ± 0.7°C
• Supply Current: 24µA
• Supply Voltage Range: 2.4V To 5.5V
• Sensor Case Style: LLP
• No. Of Pins: 8
• Msl: MSL 3 - 168 Hours
• Accuracy %: 0.8°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

When Tover goes active high, it drives Trip Test high. Trip Test high causes Tover to stay high. It is therefore latched. To release
the latch: Power down then power up. The LM57 always comes up in a released condition.
The TRIP TEST pin, normally used to check the operation of the T
the temperature exceeds the programmed limit and causes the digital outputs to assert. As shown in the figure, when T
high the TRIP TEST input is also pulled high and causes T
switching the TRIP TEST input low will reset the LM57 to normal operation. The resistor limits the current out of the T
pin.
FIGURE 10. Latch Circuit using T
FIGURE 9. Simple Latch Circuit
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output to latch high and the T
17
OVER
and T
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pins, may be used to latch the outputs whenever
Output
30080573
30080565
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output to latch low. Momentarily
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OVER
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output
goes