Overview
The STM6718SFWY6F is a dual/triple ultra-low voltage supervisor produced by STMicroelectronics. This component is part of the STM6717/18/19/20 and STM6777/78/79/80 family, designed to monitor two or three system power supply voltages. It is particularly suited for applications requiring low-voltage and low-supply current monitoring, such as set-top boxes, portable battery-powered systems, networking, and communication systems.
Key Specifications
| Parameter | Description | Typical Value | Unit |
|---|---|---|---|
| Primary Supply Voltage (VCC1) | Fixed reset thresholds: 4.63 V to 1.58 V | - | V |
| Secondary Supply Voltage (VCC2) | Fixed reset thresholds: 3.08 V to 0.79 V | - | V |
| Tertiary Supply Voltage | Externally adjustable using RSTIN with 0.626 V internal reference | - | V |
| Reset Output (RST) | Active-low, push-pull or open drain | - | - |
| Reset Delay Time (trec) | 13.2 ms, 210 ms, 900 ms (typ) | ms | - |
| Manual Reset Input (MR) | Push-button type | - | - |
| Supply Current | 11 µA (typ) at VCC1 = VCC2 = 3.6 V | µA | - |
| Operating Temperature | -40 °C to 85 °C (industrial grade) | °C | - |
| Package | SOT23-5 (WY) | - | - |
Key Features
- Multi-Voltage Monitoring: Monitors two or three system power supply voltages (VCC1, VCC2, and an externally adjustable RSTIN).
- Fixed Reset Thresholds: Customer-selectable, factory-trimmed thresholds for VCC1 and VCC2.
- Manual Reset Input: Push-button type manual reset input (MR) with optional delayed manual reset input (MRC) on some models.
- Low Supply Current: Typical supply current of 11 µA at VCC1 = VCC2 = 3.6 V.
- Reset Output Options: Active-low reset output available in push-pull or open drain configurations.
- Reset Delay Time: Programmable reset delay times of 13.2 ms, 210 ms, and 900 ms.
- Operating Temperature Range: Industrial grade operating temperature range from -40 °C to 85 °C.
Applications
The STM6718SFWY6F is targeted at various applications requiring reliable and low-power voltage monitoring, including:
- Set-top boxes (STBs)
- Portable, battery-powered systems
- Networking systems
- Communication systems
Q & A
- What is the primary function of the STM6718SFWY6F?
The primary function is to monitor two or three system power supply voltages and provide a reset signal if any of the monitored voltages drop below their respective thresholds.
- What are the typical reset thresholds for VCC1 and VCC2?
The reset thresholds for VCC1 range from 4.63 V to 1.58 V, and for VCC2 from 3.08 V to 0.79 V.
- How does the manual reset input (MR) work?
The MR is a push-button type input that asserts a reset when driven to logic low. It can be connected to VSS through a normally open momentary switch.
- What is the purpose of the MRC pin?
The MRC pin allows for an optional delayed manual reset input by connecting an external capacitor between the MRC pin and VSS.
- What are the available reset delay times?
The reset delay times are 13.2 ms, 210 ms, and 900 ms.
- What is the typical supply current of the STM6718SFWY6F?
The typical supply current is 11 µA at VCC1 = VCC2 = 3.6 V.
- What is the operating temperature range of the STM6718SFWY6F?
The operating temperature range is from -40 °C to 85 °C (industrial grade).
- In what package is the STM6718SFWY6F available?
The STM6718SFWY6F is available in a SOT23-5 (WY) package.
- What types of reset outputs are available?
The reset output is available in active-low, push-pull or open drain configurations.
- What applications are the STM6718SFWY6F typically used in?
Typical applications include set-top boxes, portable battery-powered systems, networking systems, and communication systems.
