Overview
The TPS3305-18DGNR is a dual-processor voltage supervisor with a watchdog timer, designed by Texas Instruments. This component is part of the TPS3305 family, which is a series of micropower supply voltage supervisors tailored for circuit initialization in DSP and processor-based systems. These systems often require monitoring of two supply voltages, typically core and I/O voltages. The TPS3305-18DGNR is particularly suited for applications where reliable power-on reset and watchdog functionality are critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 8-pin HVSSOP (DGN) | |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 2.7 to 6 | V |
| Threshold Voltages (SENSE1, SENSE2) | 2.93V, 1.68V | V |
| Power-On Reset Delay Time | 200ms (typ) | |
| Watchdog Timer Timeout | 1.6s (typ) | |
| Maximum Supply Current | 40µA | |
| Reset Output Type | Active High/Active Low | |
| Mounting Type | Surface Mount |
Key Features
- Dual Supervisory Circuits for DSP- and processor-based systems
- Power-On Reset Generator with a fixed delay time of 200ms; no external capacitor needed
- Watchdog Timer that retriggers the RESET output if the watchdog input (WDI) is not toggled for more than 1.6s (typ)
- Temperature-Compensated Voltage Reference
- Maximum Supply Current of 40µA
- Supply Voltage Range: 2.7V to 6V
- Defined RESET Output From VDD ≥ 1.1V
- Available in 8-pin MSOP and SO packages
Applications
- Processor Supply Monitoring
- Industrial Equipment
- Automotive Systems
- Portable/Battery-Powered Equipment
- Wireless Communication Systems
- Notebook/Desktop Computers
Q & A
- What is the primary function of the TPS3305-18DGNR?
The TPS3305-18DGNR is a dual-processor voltage supervisor with a watchdog timer, designed to monitor and manage power-on reset and watchdog functionality in DSP and processor-based systems.
- What are the threshold voltages for SENSE1 and SENSE2?
The threshold voltages for SENSE1 and SENSE2 are 2.93V and 1.68V, respectively.
- What is the power-on reset delay time?
The power-on reset delay time is 200ms (typ).
- What is the watchdog timer timeout?
The watchdog timer timeout is 1.6s (typ) if the watchdog input (WDI) is not toggled.
- What is the maximum supply current of the TPS3305-18DGNR?
The maximum supply current is 40µA.
- In what temperature range can the TPS3305-18DGNR operate?
The operating temperature range is -40°C to +85°C.
- What types of packages are available for the TPS3305-18DGNR?
The component is available in 8-pin MSOP and SO packages.
- What are some common applications for the TPS3305-18DGNR?
Common applications include processor supply monitoring, industrial equipment, automotive systems, portable/battery-powered equipment, wireless communication systems, and notebook/desktop computers.
- Is the TPS3305-18DGNR RoHS compliant?
- What is the reset output type of the TPS3305-18DGNR?
The reset output type is Active High/Active Low.
