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UCC2946-Q1

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具有看门狗计时器的汽车类 2.1V 至 5.5V 微处理器监控器

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UCC2946-Q1

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产品详情

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.235 Features Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 2 Iq (typ) (mA) 0.012 Output driver type/reset output Active-low, Push-Pull Supply voltage (min) (V) 2.1 Supply voltage (max) (V) 5.5 Rating Automotive Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 105
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.235 Features Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 2 Iq (typ) (mA) 0.012 Output driver type/reset output Active-low, Push-Pull Supply voltage (min) (V) 2.1 Supply voltage (max) (V) 5.5 Rating Automotive Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 105
TSSOP (PW) 8 19.2 mm² 3 x 6.4
  • Qualified for Automotive Applications
  • Fully Programmable Reset Threshold
  • Fully Programmable Reset Period
  • Fully Programmable Watchdog Period
  • 2% Accurate Reset Threshold
  • Input Voltage Down to 2 V
  • Input 18-µA Maximum Input Current
  • Reset Valid Down to 1 V
  • Qualified for Automotive Applications
  • Fully Programmable Reset Threshold
  • Fully Programmable Reset Period
  • Fully Programmable Watchdog Period
  • 2% Accurate Reset Threshold
  • Input Voltage Down to 2 V
  • Input 18-µA Maximum Input Current
  • Reset Valid Down to 1 V

The UCC2946 is designed to provide accurate microprocessor supervision, including reset and watchdog functions. During power up, the device asserts a reset signal RES with VDD as low as 1 V. The reset signal remains asserted until the VDD voltage rises and remains above the reset threshold for the reset period. Both reset threshold and reset period are programmable by the user.

The UCC2946 is also resistant to glitches on the VDD line. Once RES has been deasserted, any drops below the threshold voltage need to be of certain time duration and voltage magnitude to generate a reset signal. These values are shown in. An I/O line of the microprocessor may be tied to the watchdog input (WDI) for watchdog functions. If the I/O line is not toggled within a set watchdog period, programmable by the user, WDO is asserted. The watchdog function is disabled during reset conditions.

The UCC2946 is available in 8-pin TSSOP (PW) package to optimize board space.

The UCC2946 is designed to provide accurate microprocessor supervision, including reset and watchdog functions. During power up, the device asserts a reset signal RES with VDD as low as 1 V. The reset signal remains asserted until the VDD voltage rises and remains above the reset threshold for the reset period. Both reset threshold and reset period are programmable by the user.

The UCC2946 is also resistant to glitches on the VDD line. Once RES has been deasserted, any drops below the threshold voltage need to be of certain time duration and voltage magnitude to generate a reset signal. These values are shown in. An I/O line of the microprocessor may be tied to the watchdog input (WDI) for watchdog functions. If the I/O line is not toggled within a set watchdog period, programmable by the user, WDO is asserted. The watchdog function is disabled during reset conditions.

The UCC2946 is available in 8-pin TSSOP (PW) package to optimize board space.
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类型 标题 下载最新的英语版本 日期
* 数据表 Microprocessor Supervisor With Watchdog Timer 数据表 (Rev. B) 2009年 3月 10日
选择指南 Automotive Supervisor and Reset IC Selection Guide 2016年 2月 22日

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包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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