Overview
The CAT803SSDI-GT3 is a 3-pin microprocessor power supply supervisor produced by onsemi. This device is part of the CAT803, CAT809, and CAT810 series, which are designed to monitor power supplies in digital systems. The CAT803SSDI-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 supports various industry-standard threshold levels for +5.0 V, +3.3 V, +3.0 V, and +2.5 V systems. The CAT803SSDI-GT3 ensures reliable operation by ignoring fast transients on the power supply and maintaining the correct output state even at VCC levels as low as 1.0 V.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| VCC Range | 1.0 | - | 5.5 | V |
| Supply Current (ICC) | 6 | 15 | 20 | μA |
| Reset Threshold Voltage (VTH) | 2.85 | 2.93 | 3.00 | V |
| Reset Active Timeout Period (TR) | 140 | - | 460 | ms |
| Operating Temperature Range | -40 | - | +85 | °C |
| Storage Temperature Range | -65 | - | +105 | °C |
| Lead Soldering Temperature (10 sec) | - | - | 300 | °C |
| Package Type | - | - | SC-70 | - |
Key Features
- Precision monitoring of +5.0 V, +3.3 V, +3.0 V, and +2.5 V power supplies with various threshold levels.
- Open-drain RESET output (active LOW) for the CAT803SSDI-GT3.
- Reset valid down to VCC = 1.0 V.
- Low power supply current of 6 μA to 20 μA.
- Power supply transient immunity to protect against brownout failures.
- Industrial temperature range: -40°C to +85°C.
- Available in compact 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 CAT803SSDI-GT3?
The primary function of the CAT803SSDI-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 types of output configurations are available in the CAT803 series?
The CAT803 series offers three output configurations: open-drain active LOW reset (CAT803), push-pull active LOW reset (CAT809), and push-pull active HIGH reset (CAT810).
- What is the operating temperature range of the CAT803SSDI-GT3?
The operating temperature range of the CAT803SSDI-GT3 is -40°C to +85°C.
- How does the CAT803SSDI-GT3 handle power supply transients?
The CAT803SSDI-GT3 ignores fast transients on the power supply and ensures the output is in the correct state even at VCC levels as low as 1.0 V.
- What is the typical supply current of the CAT803SSDI-GT3?
The typical supply current of the CAT803SSDI-GT3 is between 6 μA and 20 μA.
- What package types are available for the CAT803SSDI-GT3?
The CAT803SSDI-GT3 is available in SC-70 and SOT-23 packages.
- Is the CAT803SSDI-GT3 Pb-free and RoHS compliant?
Yes, the CAT803SSDI-GT3 is Pb-free and RoHS compliant.
- How long does the reset signal remain active after the power supply voltage rises above the threshold?
The reset signal remains active for at least 140 ms after the power supply voltage has risen above the threshold.
- What is the recommended pull-up resistor value for the open-drain RESET output of the CAT803SSDI-GT3?
The recommended pull-up resistor value is typically between 5 kΩ and 10 kΩ.
- Can the CAT803SSDI-GT3 be used in applications requiring custom reset threshold values?
Yes, the CAT803SSDI-GT3 can be used in applications requiring custom reset threshold values due to its floating gate technology and Analog EEPROM.
