Overview
The CAT811STBI-GT3 is a microprocessor power supply supervisor produced by ON Semiconductor. This device is designed to monitor power supplies and provide a reset signal when the voltage falls below a preset threshold. It is a direct replacement for the MAX811 and operates over the industrial temperature range of -40°C to 85°C. The CAT811STBI-GT3 features a manual reset input and a RESET push-pull output that is active LOW, ensuring reliable operation even during power supply transients.
Key Specifications
| Parameter | Value | Units | Conditions |
|---|---|---|---|
| Voltage Threshold | 2.93 V | V | - |
| Power Supply Voltage Range | 1.2 V to 5.5 V | V | - |
| RESET Output Voltage Low | 0.3 V (VCC > 1.0 V, ISINK = 50 μA) | V | VCC > 1.0 V, ISINK = 50 μA |
| RESET Output Voltage High | VCC - 1.5 V (VCC > VTH max, ISOURCE = 500 μA) | V | VCC > VTH max, ISOURCE = 500 μA |
| Manual Reset Input Threshold | 0.25 VCC to 0.8 VCC | V | - |
| Manual Reset Input Pull-up Resistance | 10 kΩ to 20 kΩ | kΩ | - |
| Power Supply Current | 6 μA | μA | - |
| Package Type | SOT-143 | - | - |
| Temperature Range | -40°C to 85°C | °C | - |
Key Features
- Precision monitoring of power supply voltages with various threshold options (e.g., 2.93 V for the CAT811STBI-GT3)
- Manual reset input with an internal 20 kΩ pull-up resistor
- RESET push-pull output (active LOW)
- Power supply transient immunity to ignore fast transients
- Low power supply current of 6 μA
- Compact 4-pin SOT-143 package
- Operating temperature range of -40°C to 85°C
Applications
- Computers and computer peripherals
- Wireless devices
- Logistics and metering systems
- Sensing and instrumentation devices
- Portable devices
Q & A
- What is the primary function of the CAT811STBI-GT3?
The primary function of the CAT811STBI-GT3 is to monitor the power supply voltage and generate a reset signal if the voltage falls below a preset threshold.
- What is the operating temperature range of the CAT811STBI-GT3?
The operating temperature range is -40°C to 85°C.
- What type of output does the CAT811STBI-GT3 have?
The CAT811STBI-GT3 has a RESET push-pull output that is active LOW.
- How does the manual reset input work?
The manual reset input asserts the RESET signal when it is pulled LOW and remains active for at least 140 ms after it returns HIGH.
- What is the power supply current of the CAT811STBI-GT3?
The power supply current is 6 μA.
- What package type is the CAT811STBI-GT3 available in?
The CAT811STBI-GT3 is available in a 4-pin SOT-143 package.
- Is the CAT811STBI-GT3 immune to power supply transients?
Yes, the CAT811STBI-GT3 is designed to ignore fast transients on the power supply.
- What are some common applications of the CAT811STBI-GT3?
Common applications include computers, wireless devices, logistics and metering systems, sensing and instrumentation devices, and portable devices.
- Can the CAT811STBI-GT3 be used as a replacement for other devices?
Yes, the CAT811STBI-GT3 is a direct replacement for the MAX811 in applications operating over the industrial temperature range.
- What is the minimum voltage at which the RESET output is valid?
The RESET output is valid down to VCC = 1.0 V.
