Overview
The STM6315RDW13F 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 crucial in ensuring the stable operation of microcontrollers and other digital systems. It features an open drain reset output that can be pulled up to a voltage higher than VCC but less than 6V, and it includes a manual reset input (MR) for additional control. The device is available in the SOT143-4 package and operates over a wide temperature range of -40 to +125°C.
Key Specifications
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Operating Voltage | Supply Voltage | 1.0 | 5.5 | V | |
| ICC Supply Current | VCC Supply Current at 5.5V, no load, TA = -40 to +85°C | 2.0 | 12 | 15 | µA |
| VOL RST Output Voltage | RST Output Voltage at VCC > 4.25V, ISINK = 3.2mA | 0.4 | V | ||
| Reset Threshold Accuracy | ±1.8% at 25°C | % | |||
| Operating Temperature | Ambient Operating Temperature | -40 | +125 | °C | |
| Package | Package Type | SOT143-4 |
Key Features
- Available in SOT143-4 package
- Operating temperature range: -40 to +125°C
- Low supply current of 1.5µA (typical)
- Guaranteed RST assertion down to VCC = 1.0V
- ±1.8% reset threshold accuracy at 25°C
- Power supply transient immunity
- Open drain RST output can exceed VCC but less than 6V
- Manual reset input (MR) with internal pull-up resistor
Applications
The STM6315RDW13F 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 STM6315RDW13F?
The primary function is to assert a reset signal when the VCC supply voltage drops below a preset threshold and to keep it asserted until VCC rises above the threshold for a minimum period. - What is the typical supply current of the STM6315RDW13F?
The typical supply current is 1.5µA. - What are the available reset thresholds for the STM6315RDW13F?
The available reset thresholds are 2.63V, 2.93V, 3.08V, 4.38V, and 4.63V. - What is the operating temperature range of the STM6315RDW13F?
The operating temperature range is -40 to +125°C. - Can the RST output be pulled up to a voltage higher than VCC?
Yes, the open drain RST output can be pulled up to a voltage higher than VCC but less than 6V. - Does the STM6315RDW13F have a manual reset input?
Yes, it includes a manual reset input (MR) with an internal pull-up resistor. - What package type is the STM6315RDW13F available in?
The STM6315RDW13F is available in the SOT143-4 package. - How does the STM6315RDW13F handle power supply transients?
The device has power supply transient immunity to handle negative-going VCC transients. - Is external debounce circuitry required for the manual reset input?
No, external debounce circuitry is not required, but a 0.1µF capacitor can be added for additional noise immunity in noisy environments. - What is the recommended pull-down resistor value if RST output must be valid down to 0V?
A 100KΩ resistor is recommended.
