Overview
The CAT809JTBI-GT3 is a 3-pin microprocessor power supply supervisor produced by onsemi. It is part of the CAT809 series, which includes devices designed to monitor power supplies in digital systems. This component is a direct replacement for the MAX809 in applications operating over the industrial temperature range. The CAT809JTBI-GT3 features a push-pull RESET output that is active LOW, ensuring reliable operation in various power supply conditions.
Key Specifications
| Parameter | Min | Typical | Max | Units |
|---|---|---|---|---|
| VCC Range | 1.0 | - | 5.5 | V |
| Supply Current (VCC < 5.5 V) | 8 | 20 | 20 | µA |
| Reset Threshold Voltage (J Version) | 3.89 | 4.00 | 4.10 | V |
| Reset Active Timeout Period | 140 | - | 240 | ms |
| Operating Temperature Range | -40 | - | 85 | °C |
| Storage Temperature Range | -65 | - | 105 | °C |
| Lead Soldering Temperature (10 sec) | - | - | 300 | °C |
Key Features
- Precision monitoring of +5.0 V, +3.3 V, +3.0 V, and +2.5 V power supplies with various threshold levels.
- Push-pull RESET output (active LOW) for the CAT809JTBI-GT3.
- Reset signal asserted for at least 140 ms after the power supply voltage rises above the threshold.
- Transient immunity to protect against brownout failures; short duration transients of 4 µsec or less and 100 mV amplitude typically do not cause a false RESET.
- Available in compact 3-pin SOT-23 and SC-70 packages.
- Pb-free and RoHS compliant.
- Industrial temperature range: -40°C to +85°C.
- Low power supply current: 6 µA to 20 µA.
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 CAT809JTBI-GT3?
The primary function is to monitor the power supply in digital systems and generate a reset signal if the power supply voltage falls below a preset threshold. - What type of RESET output does the CAT809JTBI-GT3 have?
The CAT809JTBI-GT3 features a push-pull RESET output that is active LOW. - What is the reset active timeout period for the CAT809JTBI-GT3?
The reset signal is asserted for at least 140 ms after the power supply voltage rises above the threshold. - What are the available package types for the CAT809JTBI-GT3?
The device is available in 3-pin SOT-23 and SC-70 packages. - Is the CAT809JTBI-GT3 Pb-free and RoHS compliant?
Yes, it is Pb-free and RoHS compliant. - What is the operating temperature range of the CAT809JTBI-GT3?
The operating temperature range is -40°C to +85°C. - How does the CAT809JTBI-GT3 handle power supply transients?
The device has transient immunity to protect against brownout failures; short duration transients typically do not cause a false RESET. - What is the typical supply current for the CAT809JTBI-GT3?
The typical supply current is between 6 µA and 20 µA. - Can the CAT809JTBI-GT3 be used in industrial applications?
Yes, it is designed for industrial applications with an operating temperature range of -40°C to +85°C. - How do I ensure the RESET pin is in a known state when VCC is under 1.0 V?
A pull-down resistor of more than 10 kΩ between the RESET pin and GND is recommended.
