TC649VOA

Product Overview

Category: Integrated Circuit (IC)

Use: The TC649VOA is a versatile voltage supervisor IC that provides precise monitoring and control of power supply voltages in various electronic systems. It ensures reliable operation by detecting undervoltage and overvoltage conditions, triggering appropriate actions to protect the system.

Characteristics: - Monitors multiple power supply voltages simultaneously - Adjustable threshold levels for undervoltage and overvoltage detection - Programmable time delays for fault detection and response - Low quiescent current consumption - Wide operating voltage range - Compact package for easy integration into circuit designs

Package: The TC649VOA is available in a small outline integrated circuit (SOIC) package, which consists of a plastic body with metal leads for soldering onto a printed circuit board (PCB). The package dimensions are 5.3mm x 6.2mm x 1.75mm.

Essence: The essence of the TC649VOA lies in its ability to monitor and regulate power supply voltages, ensuring the stability and integrity of electronic systems.

Packaging/Quantity: The TC649VOA is typically sold in reels or tubes containing a specified quantity of ICs, such as 250 or 1000 units per reel/tube.

Specifications

• Operating Voltage Range: 2.7V to 18V
• Undervoltage Threshold Range: 0.4V to 16V
• Overvoltage Threshold Range: 0.6V to 18V
• Time Delay Range: 1ms to 64s
• Quiescent Current: 25µA (typical)
• Output Type: Open-drain
• Maximum Output Sink Current: 50mA

Detailed Pin Configuration

The TC649VOA has eight pins, each serving a specific function:

1. GND: Ground reference for the IC.
2. VDD: Positive supply voltage input.
3. RESET: Open-drain output that indicates the system is in a reset state when pulled low.
4. OV: Overvoltage threshold adjustment pin.
5. UV: Undervoltage threshold adjustment pin.
6. TD: Time delay adjustment pin.
7. MR: Manual reset input for immediate system reset.
8. VOUT: Output pin that reflects the status of the monitored power supply voltages.

Functional Features

• Simultaneous monitoring of multiple power supply voltages.
• Adjustable undervoltage and overvoltage threshold levels to suit specific system requirements.
• Programmable time delays for fault detection and response, allowing flexibility in system protection.
• Manual reset capability for immediate system recovery.
• Open-drain output for compatibility with various logic levels and easy integration into different circuit designs.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring ensures system reliability. - Adjustable thresholds and time delays provide customization options. - Low quiescent current consumption minimizes power wastage. - Wide operating voltage range accommodates diverse applications. - Compact package allows for space-efficient circuit design.

Disadvantages: - Limited maximum output sink current may restrict use in high-power applications. - Requires external components for proper operation, increasing overall system complexity.

Working Principles

The TC649VOA operates by continuously comparing the monitored power supply voltages with the user-defined threshold levels. If any voltage falls below the undervoltage threshold or exceeds the overvoltage threshold, the IC triggers the RESET output, indicating a fault condition. The time delay feature prevents false triggering due to temporary voltage fluctuations. The manual reset input (MR) allows the system to be immediately reset, overriding the normal monitoring operation.

Detailed Application Field Plans

The TC649VOA finds applications in a wide range of electronic systems, including but not limited to: - Power supply units - Industrial control systems - Automotive electronics - Telecommunications equipment - Consumer electronics

In power supply units, the TC649VOA ensures stable voltage levels, protecting sensitive components from damage. In industrial control systems, it provides reliable monitoring and fault detection for critical processes. Automotive electronics benefit from its ability to safeguard against voltage variations that could impact vehicle performance. Telecommunications equipment relies on the TC649VOA for uninterrupted operation. In consumer electronics, it enhances system reliability and protects against power-related issues.

Detailed and Complete Alternative Models

1. TC648VOA: Similar to the TC649VOA, but with fewer pins and features.
2. MAX16046: Voltage supervisor IC with adjustable thresholds and time delays.
3. LTC2914: Precision voltage monitor with programmable delay and hysteresis.
4. TPS3700: Ultra-low-power voltage supervisor with adjustable threshold levels.
5. ADM1176: Supervisor IC with integrated watchdog timer and power sequencing capabilities.

These alternative models offer similar functionality to the