LM57CISDX-5/NOPB National Semiconductor, LM57CISDX-5/NOPB Datasheet - Page 17

• Manufacturer Part Number: LM57CISDX-5/NOPB
• Description: IC PROG TEMP SWITCH SENSOR 8-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM57CISDX-5/NOPB

• Sensing Temperature: -50°C ~ 150°C
• Output Type: Open Drain, Push-Pull
• Voltage - Supply: 2.4 V ~ 5.5 V
• Accuracy: ±2.3°C
• Package / Case: 8-WFDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM57CISD-5X; LM57CISD-5X; LM57CISD-5X/NOPB; LM57CISDX-5

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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OVER
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
OVER
output
goes