Texas Instruments

The TPS3806I33-Q1 integrates two independent voltage detectors for battery voltage monitoring. During power on, the device assertsRESETandRSTSENSEwhen supply voltage VDDor the voltage at the LSENSE input becomes higher than 0.8 V. Thereafter, the supervisory circuit monitors VDDand LSENSE, keepingRESETandRSTSENSEactive as long as VDDand LSENSE remain below the threshold voltage, VIT. As soon as VDDor LSENSE rises above the threshold voltage VIT, the device deassertsRESETorRSTSENSE, respectively. The TPS3806I33-Q1 device has a fixed-sense threshold voltage VITset by an internal voltage divider at VDDand an adjustable second-LSENSE input. In addition, one can set an upper voltage threshold at HSENSE to allow a wide adjustablehysteresis window. The devices are available in a 6-pin SOT-23 package. Characterization of the TPS3806I33-Q1 device is for operation over a temperature range of –40°C to 125°C. The TPS3806I33-Q1 integrates two independent voltage detectors for battery voltage monitoring. During power on, the device assertsRESETandRSTSENSEwhen supply voltage VDDor the voltage at the LSENSE input becomes higher than 0.8 V. Thereafter, the supervisory circuit monitors VDDand LSENSE, keepingRESETandRSTSENSEactive as long as VDDand LSENSE remain below the threshold voltage, VIT. As soon as VDDor LSENSE rises above the threshold voltage VIT, the device deassertsRESETorRSTSENSE, respectively. The TPS3806I33-Q1 device has a fixed-sense threshold voltage VITset by an internal voltage divider at VDDand an adjustable second-LSENSE input. In addition, one can set an upper voltage threshold at HSENSE to allow a wide adjustablehysteresis window. The devices are available in a 6-pin SOT-23 package. Characterization of the TPS3806I33-Q1 device is for operation over a temperature range of –40°C to 125°C.

The TPS3807 family microprocessor supervisory circuits monitor system voltages as low as 1.225V. These devices assert an open-drainRSTVDDsignal when the VDDvoltage drops below a preset threshold. TheRSTVDDoutput remains asserted until the VDDvoltage returns above its threshold. The device also provides an additionalRSTSENSEoutput for a SENSE input with adjustable thresholds and hysteresis. The TPS3807 uses a precision reference to achieve 1% threshold accuracy. The TPS3807 has a very low typical quiescent current of 3.5µA, so it is well-suited to battery-powered applications. It is available in a small SC70-5 package, which is half the size of a SOT-23 package, and is fully specified over a temperature range of -40°C to +85°C. The TPS3807 family microprocessor supervisory circuits monitor system voltages as low as 1.225V. These devices assert an open-drainRSTVDDsignal when the VDDvoltage drops below a preset threshold. TheRSTVDDoutput remains asserted until the VDDvoltage returns above its threshold. The device also provides an additionalRSTSENSEoutput for a SENSE input with adjustable thresholds and hysteresis. The TPS3807 uses a precision reference to achieve 1% threshold accuracy. The TPS3807 has a very low typical quiescent current of 3.5µA, so it is well-suited to battery-powered applications. It is available in a small SC70-5 package, which is half the size of a SOT-23 package, and is fully specified over a temperature range of -40°C to +85°C.

The TPS3808Gxx-Q1 microprocessor supervisory circuits monitor system voltages from 0.4 V to 5 V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage andMRreturn above their thresholds. The TPS3808Gxx-Q1 device uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CTpin, 300 ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted from 1.25 ms to 10 s by connecting the CTpin to an external capacitor. The TPS3808Gxx-Q1 has a very low typical quiescent current of 2.4 µA, so it is well suited for battery-powered applications. The device is available in a small SOT-23 package (one option available in WSON) and is fully specified over a temperature range of –40°C to +125°C (TJ). For more information about TI’s voltage supervisor portfolio, visit theSupervisor and Reset IC Overview Pagepage. The TPS3808Gxx-Q1 microprocessor supervisory circuits monitor system voltages from 0.4 V to 5 V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage andMRreturn above their thresholds. The TPS3808Gxx-Q1 device uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CTpin, 300 ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted from 1.25 ms to 10 s by connecting the CTpin to an external capacitor. The TPS3808Gxx-Q1 has a very low typical quiescent current of 2.4 µA, so it is well suited for battery-powered applications. The device is available in a small SOT-23 package (one option available in WSON) and is fully specified over a temperature range of –40°C to +125°C (TJ). For more information about TI’s voltage supervisor portfolio, visit theSupervisor and Reset IC Overview Pagepage.

The TPS3808E family of microprocessor supervisory circuits monitors system voltages from 0.4V to 5V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3808E device uses a precision reference to achieve 0.5% threshold accuracy. The reset delay time can be set to 20ms by disconnecting the CT pin, 300ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CT pin to an external capacitor. The TPS3808E device has a very low typical quiescent current of 0.6µA, and is designed for battery-powered applications. The TPS3808E is available in the SOT-23 (6) , and is fully specified over a temperature range of –40°C to 125°C (TJ). The TPS3808E family of microprocessor supervisory circuits monitors system voltages from 0.4V to 5V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3808E device uses a precision reference to achieve 0.5% threshold accuracy. The reset delay time can be set to 20ms by disconnecting the CT pin, 300ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CT pin to an external capacitor. The TPS3808E device has a very low typical quiescent current of 0.6µA, and is designed for battery-powered applications. The TPS3808E is available in the SOT-23 (6) , and is fully specified over a temperature range of –40°C to 125°C (TJ).

The TPS3808E-Q1 family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5 V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3808E-Q1 device uses a precision reference to achieve 0.5% threshold accuracy. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808E device has a very low typical quiescent current of 0.6 µA, and is designed for battery-powered applications. The TPS3808E-Q1 is available in the SOT-23-6 , and is fully specified over a temperature range of –40°C to 125°C (TJ). The TPS3808E-Q1 family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5 V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3808E-Q1 device uses a precision reference to achieve 0.5% threshold accuracy. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808E device has a very low typical quiescent current of 0.6 µA, and is designed for battery-powered applications. The TPS3808E-Q1 is available in the SOT-23-6 , and is fully specified over a temperature range of –40°C to 125°C (TJ).

The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems. The newerTLV809Edevice is an alternative with the same pins, functions and electrical parameters. During power-on,RESETis asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDDand keepsRESETactive as long as VDDremains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td(typ)= 200 ms, starts after VDDhas risen above the threshold voltage VIT. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed sense-threshold voltage VITset by an internal voltage divider. The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 3-pin SOT-23. The TPS3809xxx-Q1 devices are characterized for operation over a temperature range of −40°C to 125°C, and are qualified in accordance with AEC-Q100 stress test qualification for integrated circuits. The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems. The newerTLV809Edevice is an alternative with the same pins, functions and electrical parameters. During power-on,RESETis asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDDand keepsRESETactive as long as VDDremains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td(typ)= 200 ms, starts after VDDhas risen above the threshold voltage VIT. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed sense-threshold voltage VITset by an internal voltage divider. The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 3-pin SOT-23. The TPS3809xxx-Q1 devices are characterized for operation over a temperature range of −40°C to 125°C, and are qualified in accordance with AEC-Q100 stress test qualification for integrated circuits.

The TPS3813-Q1 supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems. During power on, theRESETpin is asserted when the supply voltage (VDD) becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDDand keeps theRESETpin active as long as VDDremains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive (high) state to ensure proper system reset. The delay time, td= 25 ms typical, begins after VDDhas risen above the threshold voltage (VIT). When the supply voltage drops below the threshold voltage (VIT), the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage divider. For safety-critical applications, the TPS3813-Q1 family of device s incorporate a window-watchdog with programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting the WDT pin to GND or VDD, or by using an external capacitor. The lower limit, and thus the window ratio, is set by connecting the WDR pin to GND or VDD. TheRESETpin will assert a reset to the microcontroller if the watchdog is incorrectly serviced. The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The device s are available in a 6-pin SOT-23 package. The device s are characterized for operation over a temperature range of –40°C to 125°C. The TPS3813-Q1 supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems. During power on, theRESETpin is asserted when the supply voltage (VDD) becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDDand keeps theRESETpin active as long as VDDremains below the threshold voltage (VIT). An internal timer delays the return of the output to the inactive (high) state to ensure proper system reset. The delay time, td= 25 ms typical, begins after VDDhas risen above the threshold voltage (VIT). When the supply voltage drops below the threshold voltage (VIT), the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage (VIT) set by an internal voltage divider. For safety-critical applications, the TPS3813-Q1 family of device s incorporate a window-watchdog with programmable delay and window ratio. The upper limit of the watchdog time-out can be set by either connecting the WDT pin to GND or VDD, or by using an external capacitor. The lower limit, and thus the window ratio, is set by connecting the WDR pin to GND or VDD. TheRESETpin will assert a reset to the microcontroller if the watchdog is incorrectly serviced. The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The device s are available in a 6-pin SOT-23 package. The device s are characterized for operation over a temperature range of –40°C to 125°C.

The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3V. The reset delay time can be set to 20ms by disconnecting the CTpin, 300ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CTpin to an external capacitor. When used with an external capacitor, the TPS3818xxx gives a more accurate delay time than the similar TPS3808xxx device. The TPS3818 has a very low typical quiescent current of 2.4µA so it is well-suited to battery-powered applications. It is available in either a small SOT23 and an ultra-small 2mm × 2mm QFN PowerPAD package, and is fully specified over a temperature range of -40°C to +125°C (TJ). The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3V. The reset delay time can be set to 20ms by disconnecting the CTpin, 300ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CTpin to an external capacitor. When used with an external capacitor, the TPS3818xxx gives a more accurate delay time than the similar TPS3808xxx device. The TPS3818 has a very low typical quiescent current of 2.4µA so it is well-suited to battery-powered applications. It is available in either a small SOT23 and an ultra-small 2mm × 2mm QFN PowerPAD package, and is fully specified over a temperature range of -40°C to +125°C (TJ).

For all new designs with TPS3820-xx-Q1, use the TPS3820-xxQPDBVRQ1 part number. The TPS3820-xxQP is functionally equivalent and a replacement to the TPS3820xxQ. The TPS3820-xxQDBVRQ1 is not recommended for new designs (NRND). The TPS382x-xx-Q1 family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains below the threshold voltage, VIT−. An internal timer delays the return of the output to the inactive state (high) to verify a proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage VIT−. When the supply voltage drops below the threshold voltage VIT−, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, VIT–, set by an internal voltage divider. The TPS382x-xx-Q1 family also offers watchdog time out options of 200ms (TPS3820-xx-Q1) and 1.6s (TPS3823/4/8-xx-Q1). For all new designs with TPS3820-xx-Q1, use the TPS3820-xxQPDBVRQ1 part number. The TPS3820-xxQP is functionally equivalent and a replacement to the TPS3820xxQ. The TPS3820-xxQDBVRQ1 is not recommended for new designs (NRND). The TPS382x-xx-Q1 family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains below the threshold voltage, VIT−. An internal timer delays the return of the output to the inactive state (high) to verify a proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage VIT−. When the supply voltage drops below the threshold voltage VIT−, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, VIT–, set by an internal voltage divider. The TPS382x-xx-Q1 family also offers watchdog time out options of 200ms (TPS3820-xx-Q1) and 1.6s (TPS3823/4/8-xx-Q1).