Microchip TC670ECHTR: A Comprehensive Technical Overview

The Microchip TC670ECHTR represents a highly integrated, low-cost voltage detector and precision reset controller, engineered to provide reliable monitoring for power supplies in microcontroller-based systems. This device is pivotal in ensuring system stability by generating a reset signal during power-up, power-down, and brown-out conditions, thereby preventing erratic operation and data corruption.

Housed in a compact SOT-23-5 package, the TC670ECHTR is designed for space-constrained applications. Its core functionality is defined by its factory-programmed voltage thresholds, which are available in a range of standard values (e.g., 2.5V, 3.0V, 3.3V, 5.0V), eliminating the need for external components and simplifying design-in. A key feature is its extremely low supply current, typically just 1.6 µA, making it exceptionally suitable for battery-powered and portable devices where power conservation is paramount.

The device operates by comparing the monitored VCC voltage to its internal reference. The open-drain RESET output becomes active (low) whenever VCC falls below the preset threshold. This output remains asserted for a minimum period after VCC rises back above the threshold, ensuring the connected microcontroller has adequate time to stabilize. This built-in reset delay is a critical safeguard against spurious resets caused by noisy or slowly rising power rails.

Furthermore, the TC670ECHTR is characterized by its high accuracy, with a typical threshold accuracy of ±2.5%. This precision ensures predictable and dependable system behavior across variations in temperature and supply voltage. Its robust design is tailored for a wide array of applications, including embedded systems, automotive electronics, smart meters, and consumer electronics.

ICGOODFIND: The Microchip TC670ECHTR stands out as an optimal solution for designers seeking a minimalist, ultra-low-power, and highly reliable voltage monitoring IC. Its combination of factory-set thresholds, tiny form factor, and exceptional power efficiency makes it an indispensable component for enhancing the robustness of modern electronic systems.

Keywords: Voltage Detector, Reset Controller, Low Power, SOT-23-5, Brown-out Protection