Overview
The CAT809STBI-GT3 is a microprocessor power supply supervisor produced by onsemi. It is designed to monitor power supplies in digital systems and is a direct replacement for the MAX809 in applications operating over the industrial temperature range. This device generates a reset signal when the power supply voltage falls below a preset threshold level and remains asserted for at least 140 ms after the power supply level has risen above that threshold. The CAT809 utilizes ON Semiconductor's floating gate technology, allowing for custom reset threshold values, with seven industry standard threshold levels available to support various voltage systems.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Reset Threshold Voltage | 2.89 - 2.96 | V |
| Max Supply Voltage | 5.5 | V |
| Operating Temperature Range | -40 to +85 | °C |
| Supply Current | 6 - 20 | μA |
| Reset Active Timeout Period | 140 - 240 | ms |
| Package Type | SOT-23 | |
| Power Dissipation | 320 | mW |
| RESET Output Type | Push-Pull Active LOW |
Key Features
- Precision monitoring of power supplies for +5.0 V, +3.3 V, +3.0 V, and +2.5 V systems.
- Push-pull RESET output (active LOW) for the CAT809.
- Reset signal asserted for at least 140 ms after the power supply level rises above the threshold.
- Fast transients on the power supply are ignored, ensuring the output is in the correct state at VCC levels as low as 1.0 V.
- Industrial temperature range: -40°C to +85°C.
- Available in compact SOT-23 and SC-70 packages.
- Pb-free and RoHS compliant.
Applications
- Computers, servers, laptops, and cable modems.
- Wireless communications.
- Embedded control systems.
- White goods and power meters.
- Intelligent instruments.
- PDAs and handheld equipment.
Q & A
- What is the primary function of the CAT809STBI-GT3?
The primary function is to monitor power supplies in digital systems and generate a reset signal if the power supply voltage falls below a preset threshold.
- What types of packages are available for the CAT809STBI-GT3?
The device is available in SOT-23 and SC-70 packages.
- What is the operating temperature range of the CAT809STBI-GT3?
The operating temperature range is -40°C to +85°C.
- How does the CAT809STBI-GT3 handle power supply transients?
Fast transients on the power supply are ignored, ensuring the output is in the correct state at VCC levels as low as 1.0 V.
- What is the reset active timeout period for the CAT809STBI-GT3?
The reset active timeout period is between 140 ms to 240 ms.
- Is the CAT809STBI-GT3 Pb-free and RoHS compliant?
- What is the maximum supply voltage for the CAT809STBI-GT3?
The maximum supply voltage is 5.5 V.
- What type of RESET output does the CAT809STBI-GT3 feature?
The device features a push-pull RESET output (active LOW).
- How does the CAT809STBI-GT3 handle bi-directional reset pins?
The device can interface with bi-directional reset pins by connecting a 4.7 kΩ resistor in series with the reset output and the bi-directional reset pin.
- What are some common applications for the CAT809STBI-GT3?
Common applications include computers, servers, wireless communications, embedded control systems, and intelligent instruments.
