Overview
The TPS3305-18DG4, produced by Texas Instruments, is a part of the TPS3305 family of micropower supply voltage supervisors. These devices are designed for circuit initialization in dual processor and processor-based systems, particularly those requiring two supply voltages, such as core and I/O voltages.
The TPS3305-18DG4 is specifically configured to monitor 3.3V and 1.8V supply voltages, making it suitable for a wide range of applications in embedded systems, microcontrollers, and digital signal processors (DSPs).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range (VDD) | 2.7 to 6.0 | V |
| Operating Junction Temperature Range | -40 to +85 | °C |
| Threshold Voltage (SENSE1) | 2.93 V | V |
| Threshold Voltage (SENSE2) | 1.68 V | V |
| Reset Timeout | 140 ms (minimum) | ms |
| Reset Output | Active High/Active Low | |
| Watchdog Timer Input | WDI | |
| Package Type | 8-SOIC (0.154", 3.90mm Width) | |
| Mounting Type | Surface Mount |
Key Features
- Dual supervisory circuits for monitoring two supply voltages, making it ideal for DSP and processor-based systems.
- Power-On Reset Generator with a fixed delay of 200ms, eliminating the need for an external capacitor.
- Watchdog timer that retriggers the RESET output.
- Active High and Active Low reset outputs.
- Low power consumption, suitable for micropower applications.
- Operating temperature range from -40°C to +85°C.
Applications
- Dual processor and processor-based systems requiring multiple supply voltage monitoring.
- Embedded systems and microcontrollers.
- Digital Signal Processors (DSPs).
- Industrial control systems.
- Automotive and aerospace electronics.
Q & A
- What is the primary function of the TPS3305-18DG4?
The primary function of the TPS3305-18DG4 is to monitor two supply voltages and provide power-on reset and watchdog timer functions for circuit initialization in dual processor and processor-based systems.
- What are the monitored supply voltages for the TPS3305-18DG4?
The TPS3305-18DG4 monitors 3.3V and 1.8V supply voltages.
- What is the reset timeout for the TPS3305-18DG4?
The reset timeout for the TPS3305-18DG4 is a minimum of 140 ms.
- Does the TPS3305-18DG4 require an external capacitor for the power-on reset?
No, the TPS3305-18DG4 does not require an external capacitor for the power-on reset, as it has a fixed delay of 200ms.
- What are the types of reset outputs available on the TPS3305-18DG4?
The TPS3305-18DG4 provides both Active High and Active Low reset outputs.
- What is the operating temperature range of the TPS3305-18DG4?
The operating temperature range of the TPS3305-18DG4 is from -40°C to +85°C.
- What package type is the TPS3305-18DG4 available in?
The TPS3305-18DG4 is available in an 8-SOIC package.
- Is the TPS3305-18DG4 RoHS compliant?
Yes, the TPS3305-18DG4 is RoHS compliant.
- What are some common applications of the TPS3305-18DG4?
The TPS3305-18DG4 is commonly used in embedded systems, microcontrollers, DSPs, industrial control systems, and automotive and aerospace electronics.
- How does the watchdog timer function on the TPS3305-18DG4 work?
The watchdog timer on the TPS3305-18DG4 retriggers the RESET output if the watchdog timer input (WDI) does not see a transition within the specified time period.
