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TPS3306-Q1

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具有電源故障監(jiān)視功能的汽車類雙處理器監(jiān)控器

產品詳情

Rating Automotive Number of supplies monitored 3 Threshold voltage 1 (typ) (V) 1.4, 1.68, 1.85, 2.25, 2.93, 4.55 Features PFI/PFO, Timeout watchdog, Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 4 Iq (typ) (mA) 0.015 Output driver type/reset output Active-low, Open-drain Time delay (ms) 100 Watchdog timer WDI (s) 0.8 Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 6 Operating temperature range (°C) -40 to 125
Rating Automotive Number of supplies monitored 3 Threshold voltage 1 (typ) (V) 1.4, 1.68, 1.85, 2.25, 2.93, 4.55 Features PFI/PFO, Timeout watchdog, Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 4 Iq (typ) (mA) 0.015 Output driver type/reset output Active-low, Open-drain Time delay (ms) 100 Watchdog timer WDI (s) 0.8 Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 6 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm2 4.9 x 6
  • Qualified for Automotive Applications
  • Dual Supervisory Circuits With Power-Fail for DSP and Processor-Based Systems
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Watchdog Timer With 0.8-s Time-Out
  • Power-On Reset Generator With Integrated 100-ms Delay Time
  • Open-Drain Reset and Power-Fail Output
  • Supply Current of 15 μA (Typ)
  • Supply Voltage Range . . . 2.7 V to 6 V
  • Defined RESET Output From VDD ≥ 1.1 V
  • SO-8 Package
  • Temperature Range . . . –40°C to 125°C
  • Applications Include
    • Multivoltage DSPs and Processors
    • Portable Battery-Powered Equipment
    • Embedded Control Systems
    • Intelligent Instruments
    • Automotive Systems
  • Qualified for Automotive Applications
  • Dual Supervisory Circuits With Power-Fail for DSP and Processor-Based Systems
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Watchdog Timer With 0.8-s Time-Out
  • Power-On Reset Generator With Integrated 100-ms Delay Time
  • Open-Drain Reset and Power-Fail Output
  • Supply Current of 15 μA (Typ)
  • Supply Voltage Range . . . 2.7 V to 6 V
  • Defined RESET Output From VDD ≥ 1.1 V
  • SO-8 Package
  • Temperature Range . . . –40°C to 125°C
  • Applications Include
    • Multivoltage DSPs and Processors
    • Portable Battery-Powered Equipment
    • Embedded Control Systems
    • Intelligent Instruments
    • Automotive Systems

The TPS3306 family is a series of supervisory circuits designed for circuit initialization which require two supply voltages, primarily in DSP and processor-based systems.

The product spectrum of the TPS3306-xx is designed for monitoring two independent supply voltages of 3.3 V/1.5 V, 3.3 V/1.8 V, 3.3 V/2 V, 3.3 V/2.5 V, or 3.3 V/5 V.

The various supervisory circuits are designed to monitor the nominal supply voltage, as shown in the following supply-voltage monitoring table.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below the threshold voltage VIT.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output becomes active (low) again.

The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply.

The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, tt(out) = 0.50 s, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog.

The TPS3306-xx devices are available in standard 8-pin SO packages.

The TPS3306-xxQ family is characterized for operation over a temperature range of –40°C to 125°C.

The TPS3306 family is a series of supervisory circuits designed for circuit initialization which require two supply voltages, primarily in DSP and processor-based systems.

The product spectrum of the TPS3306-xx is designed for monitoring two independent supply voltages of 3.3 V/1.5 V, 3.3 V/1.8 V, 3.3 V/2 V, 3.3 V/2.5 V, or 3.3 V/5 V.

The various supervisory circuits are designed to monitor the nominal supply voltage, as shown in the following supply-voltage monitoring table.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below the threshold voltage VIT.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output becomes active (low) again.

The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply.

The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, tt(out) = 0.50 s, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog.

The TPS3306-xx devices are available in standard 8-pin SO packages.

The TPS3306-xxQ family is characterized for operation over a temperature range of –40°C to 125°C.
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* 數(shù)據(jù)表 Dual Processor Supervisory Circuits With Power-Fail 數(shù)據(jù)表 (Rev. B) 2008年 4月 30日

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參考設計

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設計指南: PDF
原理圖: PDF
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SOIC (D) 8 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續(xù)可靠性監(jiān)測
包含信息：
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