Overview
The CAT809TTBI-GT3 is a microprocessor power supply supervisor produced by onsemi. It is part of the CAT809 series, which includes devices that monitor power supplies in digital systems. These supervisors are direct replacements for the MAX809 in applications operating over the industrial temperature range. The CAT809TTBI-GT3 features a push-pull RESET output with an active LOW configuration, ensuring reliable operation in various digital systems.
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 (T Suffix) | 2.85 | 2.93 | 3.00 | V |
| Reset Active Timeout Period | 140 | - | 240 | ms |
| Operating Temperature Range | -40 | - | +85 | °C |
| Storage Temperature Range | -65 | - | +105 | °C |
| Package Type | - | - | SOT-23 | - |
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 with active LOW configuration.
- Reset valid down to VCC = 1.0 V.
- Low power supply current of 6 µA (typical) for VCC < 3.6 V.
- Power supply transient immunity to ignore fast transients.
- Industrial temperature range: -40°C to +85°C.
- Pb-free and RoHS compliant.
- Available in compact SOT-23 and SC-70 packages.
Applications
- Computers, servers, laptops, and cable modems.
- Wireless communications devices.
- Embedded control systems.
- White goods and power meters.
- Intelligent instruments.
- PDAs and handheld equipment.
Q & A
- What is the primary function of the CAT809TTBI-GT3?
The primary function of the CAT809TTBI-GT3 is to monitor the power supply voltage in digital systems and generate a reset signal if the voltage falls below a preset threshold.
- What type of RESET output does the CAT809TTBI-GT3 have?
The CAT809TTBI-GT3 features a push-pull RESET output with an active LOW configuration.
- What is the operating temperature range of the CAT809TTBI-GT3?
The operating temperature range is -40°C to +85°C.
- How does the CAT809TTBI-GT3 handle power supply transients?
The device is designed with power supply transient immunity to ignore fast transients and ensure the output is in the correct state at VCC levels as low as 1.0 V.
- What is the typical supply current for the CAT809TTBI-GT3?
The typical supply current is 15 µA for VCC < 3.6 V.
- Is the CAT809TTBI-GT3 Pb-free and RoHS compliant?
- In what packages is the CAT809TTBI-GT3 available?
The device is available in SOT-23 and SC-70 packages.
- How long does the reset signal remain asserted after the power supply voltage rises above the threshold?
The reset signal remains asserted for at least 140 ms after the power supply voltage has risen above the threshold.
- What is the recommended pull-down resistor value for the RESET pin when VCC is under 1.0 V?
A pull-down resistor of greater than 10 kΩ between the RESET pin and GND is recommended.
- Can the CAT809TTBI-GT3 interface with bi-directional reset pins?
