TPS3828 Series

Voltage monitor with watchdog timer

Catalog(7 parts)

Part	Number of Voltages Monitored▲▼	Supplier Device Package	Reset	Output	Reset Timeout▲▼	Voltage - Threshold▲▼	Mounting Type	Package / Case	Type	Operating Temperature▲▼	Operating Temperature▲▼	Grade	Qualification
Texas Instruments TPS3828-33DBVT Supervisor Open Drain or Open Collector 1 Channel SOT-23-5	1 ul	SOT-23-5	Active Low	Open Drain or Open Collector	0.119999997317791 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Simple Reset/Power-On Reset	85 °C	-40 °C
Texas Instruments TPS3828-33DBVTG4 Supervisor Open Drain or Open Collector 1 Channel SOT-23-5	1 ul	SOT-23-5	Active Low	Open Drain or Open Collector	0.119999997317791 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Simple Reset/Power-On Reset	85 °C	-40 °C
Texas Instruments TPS3828-33DBVR Supervisor Open Drain or Open Collector 1 Channel SOT-23-5	1 ul	SOT-23-5	Active Low	Open Drain or Open Collector	0.119999997317791 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Simple Reset/Power-On Reset	85 °C	-40 °C
Texas Instruments TPS3828-50QDBVRG4Q Supervisor Open Drain or Open Collector 1 Channel SOT-23-5	1 ul	SOT-23-5	Active Low	Open Drain or Open Collector	0.119999997317791 s	4.550000190734863 V	Surface Mount	SC-74A, SOT-753	Simple Reset/Power-On Reset	125 °C	-40 °C	Automotive	AEC-Q100
Texas Instruments TPS3828-50DBVT Supervisor Open Drain or Open Collector 1 Channel SOT-23-5	1 ul	SOT-23-5	Active Low	Open Drain or Open Collector	0.119999997317791 s	4.550000190734863 V	Surface Mount	SC-74A, SOT-753	Simple Reset/Power-On Reset	85 °C	-40 °C
Texas Instruments TPS3828-50DBVTG4 Supervisor Open Drain or Open Collector 1 Channel SOT-23-5	1 ul	SOT-23-5	Active Low	Open Drain or Open Collector	0.119999997317791 s	4.550000190734863 V	Surface Mount	SC-74A, SOT-753	Simple Reset/Power-On Reset	85 °C	-40 °C
Texas Instruments TPS3828-33DBVRG4 Supervisor Open Drain or Open Collector 1 Channel SOT-23-5	1 ul	SOT-23-5	Active Low	Open Drain or Open Collector	0.119999997317791 s	2.930000066757202 V	Surface Mount	SC-74A, SOT-753	Simple Reset/Power-On Reset	85 °C	-40 °C

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).