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UCC3946

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工作溫度范圍為 0°C 至 70°C、具有看門狗計時器的微處理器監控器

產品詳情

Rating Catalog Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.235 Features Overvoltage monitor only, Reset time delay, Timeout watchdog, Watchdog timer Reset threshold accuracy (%) 2 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Push-Pull Watchdog timer WDI (s) Programmable Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Operating temperature range (°C) 0 to 70
Rating Catalog Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.235 Features Overvoltage monitor only, Reset time delay, Timeout watchdog, Watchdog timer Reset threshold accuracy (%) 2 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Push-Pull Watchdog timer WDI (s) Programmable Supply voltage (min) (V) 2 Supply voltage (max) (V) 5.5 Operating temperature range (°C) 0 to 70
SOIC (D) 8 29.4 mm2 4.9 x 6 TSSOP (PW) 8 19.2 mm2 3 x 6.4
  • 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
  • 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 UCCx946 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 UCCx946 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 Figure 1. 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 UCCx946 is available in 8-pin SOIC(D), 8-pin PDIP (N) and 8-pin TSSOP(PW) packages to optimize board space.

The UCCx946 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 UCCx946 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 Figure 1. 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 UCCx946 is available in 8-pin SOIC(D), 8-pin PDIP (N) and 8-pin TSSOP(PW) packages to optimize board space.
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類型 標題 下載最新的英語版本 日期
* 數據表 Microprocessor Supervisor with Watchdog Timer 數據表 (Rev. F) 2007年 11月 21日

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
  • 持續可靠性監測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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