TPS3123

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具有看门狗计时器和手动复位功能的低电平有效、推挽式、电源电压监控器

产品详情

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.2, 1.8 Features Manual reset capable, Watchdog timer Reset threshold accuracy (%) 3.7 Iq (typ) (mA) 0.014 Output driver type/reset output Active-low, Push-Pull 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) 1.2, 1.8 Features Manual reset capable, Watchdog timer Reset threshold accuracy (%) 3.7 Iq (typ) (mA) 0.014 Output driver type/reset output Active-low, Push-Pull 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 0.75 V
  • Supply voltage supervision range:
    • 1.2 V, 1.5 V, 1.8 V (TPS312x)
    • 3 V (TPS3125 devices only)
    • Other versions on request
  • Power-on reset generator with fixed delay time of 180 ms
  • Manual reset input (TPS3123/5/6/8)
  • Watchdog timer retriggers the RESET output at VDD ≥ VIT
  • Supply current of 14 µA (Typ)
  • 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 0.75 V
  • Supply voltage supervision range:
    • 1.2 V, 1.5 V, 1.8 V (TPS312x)
    • 3 V (TPS3125 devices only)
    • Other versions on request
  • Power-on reset generator with fixed delay time of 180 ms
  • Manual reset input (TPS3123/5/6/8)
  • Watchdog timer retriggers the RESET output at VDD ≥ VIT
  • Supply current of 14 µA (Typ)
  • 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 0.75 V. 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 0.75 V. 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.

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* 数据表 TPS3123 Ultra-Low Voltage Processor Supervisory Circuits 数据表 (Rev. F) PDF | HTML 2020年 12月 23日

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SOT-23 (DBV) 5 查看选项

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  • 鉴定摘要
  • 持续可靠性监测
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