Overview
The TPS3305-18DGNG4 is a micropower supply voltage supervisor from Texas Instruments, designed for circuit initialization in dual processor and processor-based systems. This device is part of the TPS3305 family, which features dual supervisory circuits suitable for systems requiring two supply voltages, typically core and I/O voltages.
The TPS3305-18DGNG4 is particularly useful in applications where reliable power-on reset and watchdog timer functions are essential. It operates over a supply voltage range of 2.7V to 6V and is available in an 8-pin HVSSOP package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 to 6.0 | V |
| Operating Junction Temperature Range | –40 to +85 | °C |
| Threshold Voltages (SENSE1, SENSE2) | 1.68V, 2.93V | V |
| Reset Timeout | 200ms (typical) | ms |
| Watchdog Timer Period | 1.6s (typical) | s |
| Maximum Supply Current | 40µA | A |
| Package Type | HVSSOP-8 | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Key Features
- Dual supervisory circuits for monitoring two supply voltages, ideal for DSP and processor-based systems.
- Power-on reset generator with a fixed delay of 200ms, no external capacitor needed.
- Watchdog timer that retriggers the RESET output if the watchdog input is not toggled within 1.6 seconds.
- Temperature-compensated voltage reference.
- Active-low and active-high reset outputs.
- Low supply current of 40µA.
- Available in MSOP-8 and HVSSOP-8 packages.
Applications
- Industrial equipment.
- Automotive systems.
- Portable and battery-powered equipment.
- Wireless communication systems.
- Notebook and desktop computers.
Q & A
- What is the primary function of the TPS3305-18DGNG4?
The primary function is to provide dual supervisory circuits for monitoring two supply voltages in DSP and processor-based systems.
- What is the supply voltage range for the TPS3305-18DGNG4?
The supply voltage range is from 2.7V to 6.0V.
- What are the threshold voltages for SENSE1 and SENSE2?
The threshold voltages are 1.68V for SENSE1 and 2.93V for SENSE2.
- How long is the reset timeout period?
The reset timeout period is typically 200ms.
- What is the purpose of the watchdog timer?
The watchdog timer retriggers the RESET output if the watchdog input is not toggled within 1.6 seconds.
- What is the maximum supply current of the device?
The maximum supply current is 40µA.
- In what packages is the TPS3305-18DGNG4 available?
The device is available in MSOP-8 and HVSSOP-8 packages.
- What is the operating temperature range of the device?
The operating temperature range is from –40°C to +85°C.
- Is the TPS3305-18DGNG4 RoHS compliant?
Yes, the device is RoHS compliant and lead-free.
- What are some common applications for the TPS3305-18DGNG4?
Common applications include industrial equipment, automotive systems, portable and battery-powered equipment, wireless communication systems, and notebook/desktop computers.
