Microchip TCM809JVNB713 Voltage Monitor: Features and Applications
In the realm of electronic design, ensuring system stability and reliability is paramount. Voltage monitors, or microprocessor supervisory circuits, play a critical role in this regard by safeguarding microcontrollers and digital systems against unpredictable power conditions. The Microchip TCM809JVNB713 is a quintessential component in this category, offering a robust and cost-effective solution for system monitoring and control.
Key Features of the TCM809JVNB713
This device is a dedicated voltage monitor designed to monitor a system's VDD supply voltage. Its primary function is to assert a reset signal whenever the supply voltage drops below a predefined threshold, ensuring a microcontroller or CPU starts only under valid voltage conditions and is reset during power outages or brownouts.
A standout feature of this IC is its precisely controlled threshold voltage. The "713" suffix denotes a fixed reset threshold of 3.08V, making it ideally suited for monitoring 3.3V power supply rails. This accuracy is crucial for preventing erratic operation in the undefined region between a valid logic level and a brownout.
The TCM809JVNB713 is designed for ultra-low power consumption, drawing a minimal supply current. This characteristic is especially valuable in battery-powered and portable applications where extending operational life is a primary concern. Furthermore, it requires no external components for its core reset function, which simplifies board design, reduces the bill of materials (BOM), and saves valuable PCB space.
The device provides an active-low reset output, which is asserted (pulled low) when VDD falls below the threshold and remains asserted for a minimum period (the reset timeout period) after VDD has risen back above the threshold. This ensures the connected processor remains in a known state until the power supply has fully stabilized.
Housed in a compact 3-pin SOT-23 package, the TCM809JVNB713 is an excellent choice for space-constrained applications. Its industrial temperature range ensures reliable performance across a wide array of environmental conditions.
Primary Applications
The TCM809JVNB713 finds its place in a diverse range of electronic systems where dependable operation is non-negotiable.
1. Microcontroller-Based Systems: It is extensively used with PIC®, AVR®, and other microcontrollers to provide power-on reset (POR) and brown-out protection, guaranteeing a clean and controlled startup sequence.
2. Embedded Systems: From industrial control modules to IoT sensors, this voltage monitor ensures embedded brains operate correctly, preventing data corruption and uncontrolled states during power transitions.
3. Consumer Electronics: Smart home devices, set-top boxes, and digital cameras utilize such supervisors to enhance product reliability and user experience.
4. Automotive and Industrial Electronics: Its robustness makes it suitable for harsh environments in automotive subsystems and industrial automation equipment, monitoring power rails to ensure critical processes are not compromised by voltage fluctuations.
5. Portable/Battery-Powered Devices: Its low current consumption is a key advantage in medical instruments, handheld meters, and remote controls, where it can continuously monitor the battery voltage without significantly draining the source.
The Microchip TCM809JVNB713 stands out as an exceptionally efficient and reliable voltage monitoring solution. Its combination of high accuracy, minimal footprint, and ultra-low power requirements makes it an indispensable component for designers aiming to enhance system integrity across countless 3.3V applications, from consumer gadgets to critical industrial systems.
Keywords: Voltage Monitor, Microprocessor Supervisor, Reset Circuit, Low Power Consumption, 3.3V System.
