Overview
The MAX708ESA-TG, produced by onsemi, is a cost-effective microprocessor supervisory circuit designed to monitor the supply voltage (VCC) in digital systems and provide a reset signal when necessary. This device is part of the MAX707/708 series, which offers various reset threshold voltages to cater to different system requirements. The MAX708ESA-TG specifically has a reset threshold voltage of 4.38V, making it suitable for systems that require precise voltage monitoring and reset functionality.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | VCC | 1.0 | - | 5.5 | V |
| Reset Threshold Voltage | VTH | 4.25 | 4.38 | 4.50 | V |
| Quiescent Current (VCC = 3.3V) | ICC | - | 12 | 22 | μA |
| Reset Timeout Delay | tRS | 140 | 200 | 280 | ms |
| Operating Ambient Temperature | TA | -40 | - | 85 | °C |
| Package Type | - | - | - | SOIC-8 (Pb-Free) | - |
Key Features
- Precision Supply-Voltage Monitor: The MAX708ESA-TG offers precise monitoring of the supply voltage with a reset threshold voltage of 4.38V.
- Reset Threshold Available from 1.6V to 4.9V: Although the MAX708ESA-TG has a fixed threshold, the MAX707/708 series allows for various threshold options with 100mV increments (factory option).
- 200ms (Typ) Reset Timeout Delay: Ensures a stable reset signal after the supply voltage rises above the reset threshold.
- Low Quiescent Current: Only 12μA at VCC = 3.3V, making it power-efficient.
- Active-High and Active-Low Reset Output: Provides flexibility in system design with both active-high and active-low reset outputs.
- Guaranteed RESET Output Valid to VCC = 1.0V: Ensures the reset output is valid even at low supply voltages.
- Voltage Monitor for Power-Fail or Low-Battery Warning: Includes a power-fail input (PFI) for monitoring low-battery conditions.
- Pb-Free Packages Available: Compliant with lead-free requirements, making it suitable for environmentally friendly designs.
Applications
- Computers: Ideal for monitoring and resetting microprocessors in computer systems.
- Embedded Systems: Suitable for use in various embedded systems that require reliable voltage monitoring.
- Battery Powered Equipment: Useful for monitoring battery levels and providing low-battery warnings.
- Critical Microprocessor Power Supply Monitor: Essential for ensuring the stability and reliability of critical microprocessor power supplies.
Q & A
- What is the primary function of the MAX708ESA-TG?
The primary function of the MAX708ESA-TG is to monitor the supply voltage (VCC) in digital systems and provide a reset signal when the voltage falls below the reset threshold.
- What is the reset threshold voltage of the MAX708ESA-TG?
The reset threshold voltage of the MAX708ESA-TG is 4.38V.
- What is the quiescent current of the MAX708ESA-TG at VCC = 3.3V?
The quiescent current is 12μA at VCC = 3.3V.
- What is the reset timeout delay of the MAX708ESA-TG?
The reset timeout delay is typically 200ms.
- What types of packages are available for the MAX708ESA-TG?
The MAX708ESA-TG is available in an SOIC-8 package, which is lead-free.
- What is the operating ambient temperature range for the MAX708ESA-TG?
The operating ambient temperature range is -40°C to +85°C.
- Can the MAX708ESA-TG be used in battery-powered equipment?
- How does the MAX708ESA-TG handle power-up, power-down, and brownout conditions?
The MAX708ESA-TG provides accurate VCC monitoring and reset timing during power-up, power-down, and brownout conditions, and rejects negative glitches on the power supply line.
- Can the MAX708ESA-TG be driven by external logic lines?
- What is the purpose of the power-fail input (PFI) on the MAX708ESA-TG?
The power-fail input (PFI) is used for monitoring low-battery conditions or power-fail warnings.
