SP813LCN-L/TR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	--
Reset:	Active High
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	4.65V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC

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<p>The SP813LCN-L/TR is a reset supervisor device mounted in a compact 5-pin SOT-23 package. It is used for monitoring power supplies during power-on, power-off, and power-sequencing operations. A critical aspect of using this supervisor is its ability to accurately detect low-voltage threshold points. The input voltage range from 1.8V to 5.5V is wide enough to be used with most integrated circuits.</p><p>Application Field:</p><p>The SP813LCN-L/TR is well suited for low-power system and smart battery applications. It is specifically designed for use in systems running at 3V, 5V, and 7V, where power sequencing and monitoring are necessary. The SP813LCN-L/TR is used in a wide range of applications, including automotive, industrial, telecom, military, and consumer applications.</p><p>The SP813LCN-L/TR requires no external components, making it an ideal choice for space-constrained applications. Its small size allows it to fit into the most space-constrained boards. Additionally, it features overvoltage and undervoltage thresholds that are adjustable via two external resistors for added flexibility.</p><p>Working Principle:</p><p>The SP813LCN-L/TR has an internal voltage reference and two voltage comparators. The voltage reference is used to set the reset threshold by connecting it to a resistor divider network. By varying the resistance values of the resistor network, the reset threshold can be adjusted for different power supply voltages. The voltage comparators detect when the input voltage is below the preset threshold and issue a reset signal that is output through a dedicated signal pin.</p><p>The SP813LCN-L/TR also has a power-on reset (POR) circuit. This feature allows the supervisor to detect when the power supply voltage is below the reset threshold and then issue a reset signal. This signal can then be used to properly power up the system. The reset signal is asserted when the power supply voltage falls below the preset threshold, and it is de-asserted when the voltage rises above the preset threshold.</p><p>The SP813LCN-L/TR also features an active-low enable input that can be used to control the reset circuit. This feature allows the system to be powered up or powered down without necessarily issuing a reset signal. This can be useful in situations where a reset is not needed but the system must still be turned on or off.</p><p>In addition, the SP813LCN-L/TR features an open drain reset output pin that is low when the reset signal is asserting and high when the reset signal is de-asserting. The reset output can be used to drive external components such as MOSFETs or relays, allowing the reset signal to be used to power down the system.</p><p>The SP813LCN-L/TR is an excellent choice for a wide range of applications that require power supply monitoring, sequencing, and reset. Its compact size, wide input voltage range, adjustable reset thresholds, active-low enable input, and open drain reset output make it the perfect choice in applications where space is at a premium.</p>

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