Overview
The TPS3305-18DR is a micropower supply voltage supervisor designed by Texas Instruments. It is part of the TPS3305 family, which is tailored for circuit initialization in DSP and processor-based systems. This device features a dual monitor topology, making it suitable for systems that require monitoring of two supply voltages, typically core and I/O voltages. The TPS3305-18DR is available in an 8-pin SOIC (D) package and operates over a temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 2.7 to 6 | V |
| Threshold Voltages (SENSE1, SENSE2) | 1.68V, 2.93V | V |
| Reset Timeout | 140 ms (Minimum) | ms |
| Reset Type | Active High/Active Low | - |
| Output Type | Push-Pull, Totem Pole | - |
| Maximum Supply Current | 40µA | A |
| Watchdog Timer | Retriggers RESET at SENSEn ≥ VIT+ | - |
| Power-On Reset Delay Time | 200ms (Typical) | ms |
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 (typical)
- Temperature-Compensated Voltage Reference
- Maximum Supply Current of 40µA
- Defined RESET Output From VDD ≥ 1.1V
- Available in MSOP-8 and SO-8 packages
- Simultaneous dual-voltage monitoring for increased system reliability
- Compact SOIC package for space-saving
- Highly competitive in power management applications
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 TPS3305-18DR?
The TPS3305-18DR is a micropower supply voltage supervisor designed to monitor two supply voltages and provide a reset signal if either voltage falls below its threshold.
- What are the threshold voltages for the TPS3305-18DR?
The threshold voltages are 1.68V and 2.93V for SENSE1 and SENSE2, respectively.
- What is the operating temperature range of the TPS3305-18DR?
The operating temperature range is -40°C to +85°C.
- What type of package is the TPS3305-18DR available in?
The TPS3305-18DR is available in an 8-pin SOIC (D) package.
- What is the maximum supply current of the TPS3305-18DR?
The maximum supply current is 40µA.
- Does the TPS3305-18DR require an external capacitor for the power-on reset?
No, the TPS3305-18DR does not require an external capacitor for the power-on reset.
- What is the function of the watchdog timer in the TPS3305-18DR?
The watchdog timer retriggers the RESET output if the watchdog input (WDI) is not toggled for more than 1.6 seconds (typical).
- What are the common applications of the TPS3305-18DR?
Common applications include processor supply monitoring, industrial equipment, automotive systems, portable/battery-powered equipment, wireless communication systems, and notebook/desktop computers.
- Is the TPS3305-18DR RoHS compliant?
- What is the reset timeout for the TPS3305-18DR?
The minimum reset timeout is 140ms.
