Overview
The CAT803JTBI-GT3 is a 3-pin microprocessor power supply supervisor produced by onsemi. This device is part of the CAT803 series, which includes the CAT809 and CAT810, designed to monitor power supplies in digital systems. The CAT803JTBI-GT3 is specifically configured with an open-drain RESET output that is active LOW. It is a direct replacement for the MAX803 in applications operating over the industrial temperature range.
The device utilizes floating gate technology and Analog EEPROM, allowing for custom reset threshold values. It is available with seven industry-standard threshold levels to support various system voltages such as +5.0 V, +3.3 V, +3.0 V, and +2.5 V.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VCC Range | TA = −40°C to +85°C | 1.2 | 5.5 | V | |
| Supply Current (ICC) | TA = −40°C to +85°C, VCC < 5.5 V | 8 | 20 | 20 | μA |
| Reset Threshold Voltage (VTH) | TA = +25°C, J Version | 3.93 | 4.00 | 4.06 | V |
| Reset Active Timeout Period (TR) | TA = −40°C to +85°C | 140 | 460 | ms | |
| Operating Temperature Range | −40 | +85 | °C | ||
| Package | SOT-23 |
Key Features
- Precision monitoring of +5.0 V, +3.3 V, +3.0 V, and +2.5 V power supplies with various tolerance levels.
- Open-drain RESET output (active LOW) for the CAT803JTBI-GT3, requiring a pull-up resistor for proper operation.
- Reset signal asserted for at least 140 ms after the power supply voltage has risen above the threshold.
- 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.
- Industrial temperature range: −40°C to +85°C.
- Available in compact 3-pin SOT-23 and SC-70 packages.
- Pb-free and RoHS compliant.
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 CAT803JTBI-GT3?
The primary function 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 CAT803JTBI-GT3 have?
The CAT803JTBI-GT3 has an open-drain RESET output that is active LOW.
- What is the minimum reset active timeout period for the CAT803JTBI-GT3?
The minimum reset active timeout period is 140 ms.
- What is the operating temperature range for the CAT803JTBI-GT3?
The operating temperature range is −40°C to +85°C.
- What packages are available for the CAT803JTBI-GT3?
The device is available in 3-pin SOT-23 and SC-70 packages.
- Is the CAT803JTBI-GT3 Pb-free and RoHS compliant?
- How does the CAT803JTBI-GT3 handle power supply transients?
The device ignores fast transients and ensures the output is in the correct state at VCC levels as low as 1.0 V.
- What is the typical supply current for the CAT803JTBI-GT3?
The typical supply current is 20 μA.
- Can the CAT803JTBI-GT3 be used in applications requiring custom reset threshold values?
- How should the RESET output be configured for proper operation?
A pull-up resistor is required on the RESET output for proper operation.
