Inicio Gestión de la energía Supervisor & reset ICs

TPS3128

ACTIVO

Supervisor de tensión de alimentación, activo-bajo, con drenaje abierto, temporizador de vigilancia

Detalles del producto

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.14, 1.43, 1.62 Features Manual reset capable, Timeout watchdog, Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 3.7 Iq (typ) (mA) 0.014 Output driver type/reset output Active-low, Open-drain Time delay (ms) 180 Supply voltage (min) (V) 0.75 Supply voltage (max) (V) 3.3 Rating Catalog Watchdog timer WDI (s) 1.4 Operating temperature range (°C) -40 to 85
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.14, 1.43, 1.62 Features Manual reset capable, Timeout watchdog, Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 3.7 Iq (typ) (mA) 0.014 Output driver type/reset output Active-low, Open-drain Time delay (ms) 180 Supply voltage (min) (V) 0.75 Supply voltage (max) (V) 3.3 Rating Catalog Watchdog timer WDI (s) 1.4 Operating temperature range (°C) -40 to 85
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Minimum supply voltage of 0.75V
  • Supply voltage supervision range:
    • 1.2V, 1.5V, 1.8V (TPS312x)
    • 3V (TPS3125 devices only)
    • Other versions on request
  • Power-on reset generator with fixed delay time of 180ms
  • Manual reset input (TPS3123/5/6/8)
  • Watchdog timer retriggers the RESET output at VDD ≥ VIT
  • Supply current of 14µA (typical)
  • Small SOT23-5 package
  • Temperature range of –40°C to +85°C
  • Reset output available in Push-Pull (Active-Low and High) and Open-Drain (Active-Low)
  • Minimum supply voltage of 0.75V
  • Supply voltage supervision range:
    • 1.2V, 1.5V, 1.8V (TPS312x)
    • 3V (TPS3125 devices only)
    • Other versions on request
  • Power-on reset generator with fixed delay time of 180ms
  • Manual reset input (TPS3123/5/6/8)
  • Watchdog timer retriggers the RESET output at VDD ≥ VIT
  • Supply current of 14µA (typical)
  • Small SOT23-5 package
  • Temperature range of –40°C to +85°C
  • Reset output available in Push-Pull (Active-Low and High) and Open-Drain (Active-Low)

The TPS312x family of voltage supervisory circuits provides voltage monitoring down to 1.2V rails and timing supervision, primarily for DSP and processor-based systems. All devices in the family monitor the power rail and assert RESET output when the power rail is under the threshold voltage target (VIT-). The threshold voltage is programmed into the device to minimize external components. Built-in hysteresis prevents false triggering. The RESET output is not valid for supply voltage (VDD) under 0.75V. The TPS312x family includes devices with active high output for use as disable during malfunction and active-low outputs for most systems where high output indicates properly functioning system.

The TPS3123/3124/3128 also include the watchdog timer functionality to monitor timely digital pulses from the processor and issue an alert if the expected pulse does not arrive on time due to potential software freeze or hang. Such integration of supply rail monitoring and the watch dog timer feature is very helpful in always on systems, such as Factory Automation and Communications Infrastructure.

In addition the TPS3123/5/6/8 devices incorporate a manual reset input, MR, to force RESET triggered by an event unrelated to the voltage rail monitoring of the pulses monitored by the watch dog timer. A low level at MR causes RESET to become active. The TPS3124 devices do not have the input MR, but include a high-level output RESET same as the TPS3125 and TPS3126 devices.

All devices in the family are available in a 5-pin SOT23-5 package and are characterized for operation over a temperature range of –40°C to +85°C.

The TPS312x family of voltage supervisory circuits provides voltage monitoring down to 1.2V rails and timing supervision, primarily for DSP and processor-based systems. All devices in the family monitor the power rail and assert RESET output when the power rail is under the threshold voltage target (VIT-). The threshold voltage is programmed into the device to minimize external components. Built-in hysteresis prevents false triggering. The RESET output is not valid for supply voltage (VDD) under 0.75V. The TPS312x family includes devices with active high output for use as disable during malfunction and active-low outputs for most systems where high output indicates properly functioning system.

The TPS3123/3124/3128 also include the watchdog timer functionality to monitor timely digital pulses from the processor and issue an alert if the expected pulse does not arrive on time due to potential software freeze or hang. Such integration of supply rail monitoring and the watch dog timer feature is very helpful in always on systems, such as Factory Automation and Communications Infrastructure.

In addition the TPS3123/5/6/8 devices incorporate a manual reset input, MR, to force RESET triggered by an event unrelated to the voltage rail monitoring of the pulses monitored by the watch dog timer. A low level at MR causes RESET to become active. The TPS3124 devices do not have the input MR, but include a high-level output RESET same as the TPS3125 and TPS3126 devices.

All devices in the family are available in a 5-pin SOT23-5 package and are characterized for operation over a temperature range of –40°C to +85°C.

Descargar Ver vídeo con transcripción Video

Productos similares que pueden interesarle

open-in-new Comparar alternativas
Pin por pin con la misma funcionalidad que el dispositivo comparado
TPS3828 ACTIVO Monitor de tensión con temporizador de vigilancia Option for threshold voltages up to 2.5V
Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
TPS3851 ACTIVO Supervisión de tensión de alta precisión con temporizador de vigilancia integrado Integrated watchdog and voltage monitor option with enhanced accuracy (0.8%)
Funcionalidad similar a la del dispositivo comparado
TPS3431 ACTIVO Temporizador de vigilancia programable estándar con activación Standalone watchdog timer option with no built-in voltage monitoring

Documentación técnica

star =Principal documentación para este producto seleccionada por TI
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 3
Tipo Título Fecha
* Data sheet TPS3123 Ultra-Low Voltage Processor Supervisory Circuits datasheet (Rev. G) PDF | HTML 11 jun 2024
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 jun 2019
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs 19 sep 2011

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOT-23 (DBV) 5 Ultra Librarian

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI. ​​​​​​​​​​​​​​

Videos