Overview
The STM1001RWX6F is a microprocessor reset circuit produced by STMicroelectronics. This low-power supervisory device is designed to monitor power supplies and assert a reset signal whenever the VCC supply voltage drops below a preset threshold. It is particularly useful in ensuring the stable operation of microcontrollers and other digital systems by preventing them from operating in an undefined state due to power supply anomalies.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| VCC Operating Voltage | TA = –40 to +85 °C | 1.2 to 5.5 | V |
| VCC Supply Current | VCC < 3.6 V | 5.5 to 10 | µA |
| VCC Supply Current | VCC < 5.5 V | 7 to 15 | µA |
| Reset Threshold (VRST) | STM1001R (25 °C) | 2.59 to 2.66 | V |
| Reset Pulse Width (trec) | Option B | 20 to 40 ms | ms |
| Reset Pulse Width (trec) | Option Blank | 140 to 280 ms | ms |
| Operating Temperature | –40 to 85 °C | °C | |
| Package Type | SOT23-3 |
Key Features
- Precision Monitoring: Monitors 3 V, 3.3 V, and 5 V supply voltages with precise reset thresholds.
- Open Drain RST Output: The reset output is an open drain, requiring a pull-up resistor for operation.
- Low Supply Current: Typical supply current of 6 µA, making it suitable for low-power applications.
- Guaranteed RST Assertion: RST is guaranteed valid down to VCC = 1 V (0° to 70 °C).
- Transient Immunity: Relatively immune to negative-going VCC transients, with additional immunity provided by a 0.1 µF bypass capacitor.
- Compact Package: Available in a small SOT23-3 package, suitable for space-constrained designs.
Applications
- Microcontroller Systems: Ensures stable operation of microcontrollers by preventing undefined states due to power supply anomalies.
- Embedded Systems: Suitable for use in various embedded systems requiring power supply monitoring.
- Industrial Automation: Used in industrial automation to ensure reliable operation of control systems.
- Consumer Electronics: Applied in consumer electronics to monitor and manage power supplies effectively.
Q & A
- What is the primary function of the STM1001RWX6F?
The primary function is to monitor power supplies and assert a reset signal whenever the VCC supply voltage drops below a preset threshold.
- What are the typical supply current values for the STM1001RWX6F?
The typical supply current is 5.5 to 10 µA for VCC < 3.6 V and 7 to 15 µA for VCC < 5.5 V.
- What is the operating temperature range for the STM1001RWX6F?
The operating temperature range is –40 to 85 °C.
- What type of package does the STM1001RWX6F come in?
The STM1001RWX6F comes in a SOT23-3 package.
- How does the STM1001RWX6F handle negative-going VCC transients?
The device is relatively immune to negative-going VCC transients, and additional immunity can be provided by a 0.1 µF bypass capacitor.
- What are the reset pulse width options for the STM1001RWX6F?
The reset pulse width options are 20 to 40 ms (Option B) and 140 to 280 ms (Option Blank).
- What is the significance of the open drain RST output?
The open drain RST output requires a pull-up resistor for operation, allowing flexibility in the reset circuit design.
- How does the STM1001RWX6F ensure RST assertion at low VCC levels?
RST is guaranteed valid down to VCC = 1 V (0° to 70 °C).
- What are some common applications of the STM1001RWX6F?
Common applications include microcontroller systems, embedded systems, industrial automation, and consumer electronics.
- Where can I find detailed specifications and datasheets for the STM1001RWX6F?
Detailed specifications and datasheets can be found on the STMicroelectronics official website and other electronic component databases like Digi-Key and Mouser.
