Overview
The STM6315RGW13F is a low power supervisory device produced by STMicroelectronics, designed to monitor power supplies and assert a reset signal when the supply voltage drops below a preset threshold. This microprocessor reset circuit ensures reliable operation by keeping the reset signal asserted until the supply voltage rises above the threshold for a minimum period of time (trec). It also features a manual reset input (MR) and an open drain RST output that can be pulled up to a voltage higher than VCC but less than 6V.
Key Specifications
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC | Operating voltage | 1.0 | 5.5 | V | |
| ICC | VCC supply current | 2.0 | 12 | 15 | µA |
| VOL | RST output voltage | 0.3 | V | ||
| VRST | Reset threshold voltage | 2.63 | 4.63 | V | |
| trec | Reset time-out period | 1.5ms | 1680ms | ms | |
| Operating Temperature | -40 | 125 | °C | ||
| Package | SOT143-4 |
Key Features
- Low supply current of 1.5µA (typical)
- ±1.8% reset threshold accuracy at 25°C
- Guaranteed RST assertion down to VCC = 1.0V
- Open drain RST output can exceed VCC but must be less than 6V
- Power supply transient immunity
- Operating temperature range: -40 to +125°C
- Available in SOT143-4 package
- Manual reset input (MR) with internal pull-up resistor (63kΩ typical)
Applications
The STM6315RGW13F is suitable for various applications where reliable power supply monitoring is crucial, such as:
- Microprocessor and microcontroller systems
- Embedded systems requiring power supply supervision
- Industrial control systems
- Automotive electronics
- Consumer electronics requiring low power consumption and reliable reset functionality
Q & A
- What is the primary function of the STM6315RGW13F?
The primary function is to assert a reset signal whenever the VCC supply voltage drops below a preset threshold and to keep it asserted until VCC has risen above the threshold for a minimum period of time.
- What are the available reset threshold voltages for the STM6315?
The available reset threshold voltages are 2.63V, 2.93V, 3.08V, 4.38V, and 4.63V.
- What is the typical supply current of the STM6315?
The typical supply current is 1.5µA.
- What is the operating temperature range of the STM6315?
The operating temperature range is -40 to +125°C.
- Can the RST output be pulled up to a voltage higher than VCC?
- What is the purpose of the manual reset input (MR)?
The manual reset input (MR) allows for manual assertion of the reset signal by taking MR low.
- How does the STM6315 handle power supply transients?
The STM6315 has power supply transient immunity, ensuring it is relatively immune to negative-going VCC transients.
- What package type is the STM6315 available in?
The STM6315 is available in the SOT143-4 package.
- What is the reset time-out period (trec) for the STM6315?
The reset time-out period (trec) can be 1.5ms, 30ms, 210ms, or 1680ms depending on the specific part number.
- Is external debounce circuitry required for the manual reset input?
No, external debounce circuitry is not required for the manual reset input, but a 0.1µF capacitor can be added for additional noise immunity in noisy environments.
