TPS3820 Series

Active-low, push-pull, voltage supervisor (reset IC) with 0.2-s watchdog & manual reset

Catalog(9 parts)

Part	Supplier Device Package	Type	Operating Temperature▲▼	Operating Temperature▲▼	Number of Voltages Monitored▲▼	Reset	Reset Timeout▲▼	Voltage - Threshold▲▼	Mounting Type	Package / Case	Output	Qualification	Grade
Texas Instruments TPS3820-50DBVR Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Simple Reset/Power-On Reset	85 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	4.550000190734863 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole
Texas Instruments TPS3820-50QPDBVRQ1 Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Monitor	125 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	4.550000190734863 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole	AEC-Q100	Automotive
Texas Instruments TPS3820-50DBVT Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Simple Reset/Power-On Reset	85 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	4.550000190734863 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole
Texas Instruments TPS3820-33DBVR Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Simple Reset/Power-On Reset	85 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole
Texas Instruments TPS3820-33QDBVRQ1 Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Simple Reset/Power-On Reset	125 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole	AEC-Q100	Automotive
Texas Instruments TPS3820-33DBVTG4 Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Simple Reset/Power-On Reset	85 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole
Texas Instruments TPS3820-33DBVRG4 Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Simple Reset/Power-On Reset	85 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole
Texas Instruments TPS3820-50QDBVRQ1 Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Simple Reset/Power-On Reset	125 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	4.550000190734863 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole	AEC-Q100	Automotive
Texas Instruments TPS3820-33QPDBVRQ1 Supervisor Push-Pull, Totem Pole 1 Channel SOT-23-5	SOT-23-5	Monitor	125 °C	-40 °C	1 ul	Active Low	0.014999999664723871 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Push-Pull, Totem Pole	AEC-Q100	Automotive

Key Features

• Power-on reset generator with a fixed delay time of 200ms (TPS3823, TPS3824, TPS3825, and TPS3828) or 25ms (TPS3820)Manual reset input (TPS3820, TPS3823, TPS3825, and TPS3828)Reset output available in active-low (TPS3820, TPS3823, TPS3824, and TPS3825), active-high (TPS3824 and TPS3825), and open drain (TPS3828)Supply voltage supervision range: 2.5V, 3V, 3.3V, 5VWatchdog timer (TPS3820, TPS3823, TPS3824, and TPS3828)Supply current of 15µA (typical)5-pin SOT-23 packageTemperature range: −40°C to 85°C (−40°C to 125°C for TPS3823A-33)Power-on reset generator with a fixed delay time of 200ms (TPS3823, TPS3824, TPS3825, and TPS3828) or 25ms (TPS3820)Manual reset input (TPS3820, TPS3823, TPS3825, and TPS3828)Reset output available in active-low (TPS3820, TPS3823, TPS3824, and TPS3825), active-high (TPS3824 and TPS3825), and open drain (TPS3828)Supply voltage supervision range: 2.5V, 3V, 3.3V, 5VWatchdog timer (TPS3820, TPS3823, TPS3824, and TPS3828)Supply current of 15µA (typical)5-pin SOT-23 packageTemperature range: −40°C to 85°C (−40°C to 125°C for TPS3823A-33)

Description

The TPS382x 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 less than the threshold voltage, VIT−. An internal timer delays the return of the output to the inactive state (high) to make sure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage (VIT− + VHYS). 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 family also offers watchdog time out options of 200ms (TPS3820) and 1.6s (TPS3823, TPS3824, and TPS3828). The TPS382x 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 less than the threshold voltage, VIT−. An internal timer delays the return of the output to the inactive state (high) to make sure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage (VIT− + VHYS). 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 family also offers watchdog time out options of 200ms (TPS3820) and 1.6s (TPS3823, TPS3824, and TPS3828).