Overview
The STM6321SWY6F is a microprocessor supervisory circuit produced by STMicroelectronics. This device is part of the STM6xxx series, designed to provide essential supervisory functions for microprocessors. It features precision voltage monitoring, a watchdog timer, and a push-button reset input, all packaged in a compact 5-pin SOT23 package. The STM6321SWY6F is ideal for ensuring reliable operation of microprocessor-based systems by monitoring the supply voltage and asserting a reset signal when necessary.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 5-pin SOT23 |
| Supply Voltage (VCC) | 5 V, 3.3 V, 3 V, 2.5 V |
| Reset Output | Active low (open drain), Active high (push-pull) |
| Reset Pulse Width | 1.4 ms, 200 ms, 240 ms (typ.) |
| Watchdog Timeout Period | 1.6 s (typ.) |
| Manual Reset Input (MR) | Active low with internal 52 kΩ pull-up |
| Supply Current | 3 µA (typ.) |
| Operating Temperature | –40 to +85 °C (industrial grade) |
| RoHS Compliance | Lead-free components compliant with RoHS directive |
Key Features
- Precision voltage monitoring of VCC input for out-of-tolerance conditions.
- Watchdog timer to detect out-of-control microprocessor conditions.
- Push-button reset input (MR) with internal 52 kΩ pull-up resistor.
- Active low and active high reset outputs with push-pull and open drain configurations.
- Low supply current of 3 µA (typ.).
- Guaranteed reset assertion down to VCC = 1.0 V.
- Operating temperature range of –40 to +85 °C.
- RoHS compliance with lead-free components.
Applications
The STM6321SWY6F is suitable for a variety of microprocessor-based systems that require reliable voltage monitoring and reset functions. These include:
- Embedded systems and IoT devices.
- Industrial control systems.
- Automotive electronics.
- Medical devices.
- Consumer electronics requiring robust power management.
Q & A
- What is the primary function of the STM6321SWY6F?
The primary function is to provide microprocessor supervisory functions, including precision voltage monitoring, a watchdog timer, and a push-button reset input. - What are the available reset output configurations for the STM6321SWY6F?
The device offers active low (open drain and push-pull) and active high (push-pull) reset outputs. - What is the typical watchdog timeout period for the STM6321SWY6F?
The typical watchdog timeout period is 1.6 seconds. - How does the manual reset input (MR) work?
A logic low on MR asserts the reset output. The reset remains asserted as long as MR is low and for the reset timeout period after MR returns high. - What is the operating temperature range of the STM6321SWY6F?
The operating temperature range is –40 to +85 °C (industrial grade). - Is the STM6321SWY6F RoHS compliant?
Yes, the device is RoHS compliant with lead-free components. - What is the typical supply current of the STM6321SWY6F?
The typical supply current is 3 µA. - How does the watchdog timer function in the STM6321SWY6F?
The watchdog timer asserts a reset if the watchdog input (WDI) remains high or low for at least 1.6 seconds. The timer clears with a reset pulse or by toggling WDI. - What package type is the STM6321SWY6F available in?
The device is available in a 5-pin SOT23 package. - What are the supported supply voltages for the STM6321SWY6F?
The device supports supply voltages of 5 V, 3.3 V, 3 V, and 2.5 V.
