Overview
The STM811LW16F is a low-power supervisory device from STMicroelectronics, designed to monitor power supplies and ensure proper system operation. It is part of the STM809/810/811/812 family of microprocessor reset circuits. The device asserts a reset signal when the supply voltage drops below a preset threshold and keeps it asserted until the voltage rises above the threshold for a minimum recovery time.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-143 4 |
| Operating Temperature | -40 °C to 85 °C (industrial grade) |
| Supply Voltage Monitoring | 3 V, 3.3 V, 5 V |
| Reset Pulse Width | 140 ms (min) |
| Output Configuration | Push-pull RST output |
| Supply Current | 6 µA (typ) |
| Reset Assertion | Guaranteed down to VCC = 1.0 V |
| RoHS Compliance | Ecopack3 |
Key Features
- Lead-free, small SOT23 and SOT143 package
- Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
- 140 ms reset pulse width (min)
- Push-pull RST output configuration
- Low supply current - 6 µA (typ)
- Guaranteed RST assertion down to VCC = 1.0 V
- Push-button reset input (MR) available on some models
Applications
The STM811LW16F is suitable for various applications, including communications equipment, computers, and peripherals, as well as industrial systems that require reliable power supply monitoring.
Q & A
- What is the primary function of the STM811LW16F? The primary function is to monitor the power supply and assert a reset signal if the voltage drops below a preset threshold.
- What are the supported supply voltages for the STM811LW16F? The device supports precision monitoring of 3 V, 3.3 V, and 5 V supply voltages.
- What is the minimum reset pulse width of the STM811LW16F? The minimum reset pulse width is 140 ms.
- What is the typical supply current of the STM811LW16F? The typical supply current is 6 µA.
- What is the operating temperature range of the STM811LW16F? The operating temperature range is -40 °C to 85 °C (industrial grade).
- Is the STM811LW16F RoHS compliant? Yes, the device is RoHS compliant with an Ecopack3 rating.
- What package types are available for the STM811LW16F? The device is available in SOT-143 4 packages.
- Does the STM811LW16F have a push-button reset input? Yes, some models of the STM811 series include a push-button reset input (MR).
- What are some common applications for the STM811LW16F? Common applications include communications equipment, computers, peripherals, and industrial systems.
- How does the STM811LW16F ensure reliable reset assertion? The device guarantees reset assertion down to VCC = 1.0 V.
