Overview
The CAT809STBI-T3 is a 3-pin microprocessor power supply supervisor produced 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 CAT809STBI-T3 is designed to monitor power supplies in digital systems, ensuring reliable operation by generating a reset signal when the power supply voltage falls below a preset threshold level.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VCC Range | TA = 0°C to +70°C | 1.0 | 5.5 | V | |
| VCC Range | TA = −40°C to +85°C | 1.2 | 5.5 | V | |
| ICC Supply Current | TA = −40°C to +85°C, VCC < 3.6 V | 6 | 15 | μA | |
| VTH Reset Threshold Voltage | TA = +25°C | 2.89 | 2.93 | 2.96 | V |
| VTH Reset Threshold Voltage | TA = −40°C to +85°C | 2.85 | 3.00 | V | |
| Reset Active Timeout Period | TA = −40°C to +85°C | 140 | 460 | ms | |
| VOL RESET Output Voltage Low | VCC > 1.0 V, ISINK = 50 μA | 0.3 | V | ||
| VOH RESET Output Voltage High | VCC = VTH max, ISOURCE = 500 μA | 0.8 VCC | V |
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 (active LOW) for the CAT809 series.
- Reset valid down to VCC = 1.0 V.
- Low power supply current of 6 μA.
- Power supply transient immunity to protect against brownout failures.
- 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.
- Embedded control systems.
- White goods and power meters.
- Intelligent instruments.
- PDAs and handheld equipment.
Q & A
- What is the primary function of the CAT809STBI-T3?
The primary function of the CAT809STBI-T3 is to monitor the power supply in digital systems and generate a reset signal when the power supply voltage falls below a preset threshold level.
- What are the available output configurations for the CAT809 series?
The CAT809 series features a push-pull RESET output (active LOW).
- What is the industrial temperature range for the CAT809STBI-T3?
The industrial temperature range is −40°C to +85°C.
- What types of packages are available for the CAT809STBI-T3?
The device is available in both SOT-23 and SC-70 packages.
- Is the CAT809STBI-T3 Pb-free and RoHS compliant?
- What is the reset active timeout period for the CAT809STBI-T3?
The reset active timeout period is at least 140 ms after the power supply voltage has risen above the threshold.
- How does the CAT809STBI-T3 handle power supply transients?
The device ignores fast transients on the power supply 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 CAT809STBI-T3?
The typical supply current is 15 μA.
- Can the CAT809STBI-T3 be used in applications requiring custom reset threshold values?
- What are some common applications for the CAT809STBI-T3?
