The TPS382x family of supervisors provides circuit initialization and timing supervision, primarily for DSP and processor-based systems.

During power-on, RESET\ is asserted when supply voltage VDD becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET\ active as long as VDD remains below the threshold voltage VIT–. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage VIT–. When the supply voltage drops below the threshold voltage VIT–, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage VIT– set by an internal voltage divider.

The TPS3820/3/5/8 devices incorporate a manual reset input, MR\. A low level at MR\ causes RESET\ to become active. The TPS3824/5 devices include a high-level output RESET. TPS3820/3/4/8 have a watchdog timer that is periodically triggered by a positive or negative transition at WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, ttout, RESET\ becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog.

In applications where the input to the WDI pin may be active (transitioning high and low) when the TPS3820/3/4/8 is asserting RESET\, the TPS3820/3/4/8 does not return to a non-reset state when the input voltage is above Vt. If the application requires that input to WDI is active when RESET\ is asserted, WDI must be decoupled from the active signal. This can be accomplished by using an N-channel FET in series with the WDI pin, with the gate of the FET connected to the RESET\ output as shown in Figure 1.

The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 5-pin SOT23-5 package. The TPS382x-xxQ-Q1 devices are characterized for operation over a temperature range of –40°C to 125°C, and are qualified in accordance with AEC-Q100 stress test qualification for integrated circuits.

• Qualified for Automotive Applications
• ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Using Human Body Model(C = 100 pF, R = 1500 )
• Power-On Reset Generator With Fixed Delay Time of 200 ms (TPS3823/4/5/8) or 25 ms (TPS3820)
• Manual Reset Input (TPS3820/3/5/8)
• Reset Output Available in Active-Low (TPS3820/3/4/5), Active-High (TPS3824) and Open-Drain (TPS3828)
• Supply Voltage Supervision Range 2.5 V, 3 V, 3.3 V, 5 V
• Watchdog Timer (TPS3820/3/4/8)
• Supply Current of 15 µA (Typ)
• SOT23-5 Package
• Applications
  • Applications Using Automotive DSPs, Microcontrollers, or Microprocessors
  • Industrial Equipment
  • Programmable Controls
  • Automotive Systems
  • Battery-Powered Equipment
  • Intelligent Instruments
  • Wireless Communications Systems

• UC2625 - 无刷 DC 电机控制器
• MSP430FR5889 - MSP430FR5889 混合信号微处理器
• LP2988 - 具有可编程上电复位延迟的微功耗，200 mA 超低压降 低噪声电压稳压器
• ADS1292R - 具有集成呼吸阻抗 ECG 前端的 2 通道 24 位模数转换器
• TLC1518 - 10 位 400kSPS ADC，具有串行输出、SPI/DSP 兼容接口、关断状态、8 通道
• TS3DV421 - 4 通道差动 8:16 多路复用器开关
• DS36276 - 故障保护多点收发器
• CD54HC157 - 高速 CMOS 逻辑四路 2 输入多路复用器
• TPS62562 - 采用 2x2mm SON 封装的 2.25MHz 600mA 降压转换器
• TPS40131 - 具有集成 Mosfet 驱动器的二相同步降压控制器