Overview
The STM6315RBW13F from STMicroelectronics is a low-power supervisory device designed to monitor power supplies and assert a reset signal when the supply voltage drops below a preset threshold. This microprocessor reset circuit is essential for ensuring the stable operation of microcontrollers and other digital systems. It features an active-low, open-drain reset output and a manual reset input, making it versatile for various applications. The device operates over a wide temperature range and is available in the SOT143-4 package.
Key Specifications
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Operating Voltage | Supply Voltage | 1.0 | 5.5 | V | |
| ICC Supply Current | VCC Supply Current | 2.0 | 12 | 15 | µA |
| VOL RST Output Voltage | RST Output Voltage | 0.3 | V | ||
| Reset Threshold Accuracy | ±1.8% at 25°C | % | |||
| Operating Temperature | Ambient 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
- Manual reset input (MR) with internal pull-up resistor (63kΩ typical)
- No external debounce circuitry required for manual reset
Applications
The STM6315RBW13F is suitable for a variety of applications where reliable power supply monitoring and reset functionality are critical. These include:
- Microcontroller and microprocessor systems
- Embedded systems requiring power supply monitoring
- Industrial control systems
- Automotive electronics
- Consumer electronics requiring robust power management
Q & A
- What is the primary function of the STM6315RBW13F?
The primary function of the STM6315RBW13F is to monitor the power supply and assert a reset signal when the supply voltage drops below a preset threshold.
- What is the typical supply current of the STM6315RBW13F?
The typical supply current of the STM6315RBW13F is 1.5µA.
- What is the accuracy of the reset threshold?
The reset threshold accuracy is ±1.8% at 25°C.
- What is the operating temperature range of the STM6315RBW13F?
The operating temperature range is –40 to +125°C.
- Does the STM6315RBW13F require external debounce circuitry for the manual reset input?
No, external debounce circuitry is not required for the manual reset input.
- What package type is the STM6315RBW13F available in?
The STM6315RBW13F is available in the SOT143-4 package.
- Can the RST output be pulled up to a voltage higher than VCC?
Yes, the RST output can be pulled up to a voltage higher than VCC but must be less than 6V.
- How does the STM6315RBW13F handle negative-going VCC transients?
The STM6315RBW13F is relatively immune to negative-going VCC transients, and a 0.1µF bypass capacitor can provide additional transient immunity.
- What is the recommended pull-up resistor value for the RST output?
A 10kΩ pull-up resistor is sufficient in most applications.
- What happens to the RST output when VCC falls below 1V?
When VCC falls below 1V, the RST output no longer sinks current and becomes an open circuit.
