Overview
The CAT809LTBI-GT3 is a 3-pin microprocessor power supply supervisor developed by onsemi. This device is part of the CAT809 series, which includes direct replacements for the MAX809 in applications operating over the industrial temperature range. The CAT809LTBI-GT3 monitors power supplies in digital systems, ensuring reliable operation by generating a reset signal when the power supply voltage falls below a preset threshold level.
The device features a push-pull RESET output that is active LOW, and it is available in a compact 3-pin SOT-23 package. The CAT809 series utilizes floating gate technology, allowing for custom reset threshold values, with seven industry-standard threshold levels to support various system voltages.
Key Specifications
| Parameter | Min | Typical | Max | Units |
|---|---|---|---|---|
| VCC Range | 1.0 | - | 5.5 | V |
| Supply Current (VCC < 3.6 V) | 6 | 15 | - | µA |
| Reset Threshold Voltage (L) | 4.56 | 4.63 | 4.70 | V |
| Reset Active Timeout Period | 140 | - | 460 | 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 tolerance levels.
- Push-pull RESET output (active LOW) for the CAT809LTBI-GT3.
- Direct replacements for the MAX809 in applications operating over the industrial temperature range.
- Reset valid down to VCC = 1.0 V.
- Low power supply current of 6 µA to 15 µA.
- Power supply transient immunity.
- Industrial temperature range: -40°C to +85°C.
- Available in 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 CAT809LTBI-GT3?
The CAT809LTBI-GT3 is a microprocessor power supply supervisor that monitors the power supply voltage and generates a reset signal if the voltage falls below a preset threshold.
- What type of RESET output does the CAT809LTBI-GT3 have?
The CAT809LTBI-GT3 features a push-pull RESET output that is active LOW.
- What are the available package options for the CAT809LTBI-GT3?
The device is available in both SOT-23 and SC-70 packages.
- What is the operating temperature range of the CAT809LTBI-GT3?
The operating temperature range is -40°C to +85°C.
- Is the CAT809LTBI-GT3 Pb-free and RoHS compliant?
- What is the typical supply current of the CAT809LTBI-GT3?
The typical supply current is between 6 µA and 15 µA.
- How does the CAT809LTBI-GT3 handle power supply transients?
The device has power supply transient immunity, ignoring short duration transients and 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 CAT809LTBI-GT3?
The reset active timeout period is between 140 ms and 460 ms.
- Can the CAT809LTBI-GT3 be used in bi-directional reset pin configurations?
- What is the recommended pull-down resistor configuration for the RESET pin when VCC is under 1.0 V?
A pull-down resistor greater than 10 kΩ between the RESET pin and GND is recommended.
