Overview
The CAT809ZTBI-GT3 is a microprocessor power supply supervisor IC produced by onsemi. It is part of the CAT809 series, which includes devices designed to monitor power supplies in digital systems. This IC is particularly useful for ensuring that microprocessors and other digital circuits operate within safe voltage limits, preventing damage from power supply anomalies.
The CAT809ZTBI-GT3 is a direct replacement for the MAX809 in applications operating over the industrial temperature range and is available in compact 3-pin SOT-23 and SC-70 packages. It features a push-pull RESET output that is active LOW, making it suitable for a variety of applications requiring precise power supply monitoring.
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 < 3.6 V | 6 | 15 | μA | |
| Reset Threshold Voltage (VTH) | TA = +25°C, Z Version | 2.28 | 2.32 | 2.35 | V |
| Reset Active Timeout Period (TR) | TA = −40°C to +85°C | 140 | 460 | ms | |
| RESET Output Voltage Low (VOL) | VCC = VTH min, ISINK = 1.2 mA | 0.3 | V | ||
| RESET Output Voltage High (VOH) | VCC = VTH max, ISOURCE = 500 μA | VCC - 1.5 | V | ||
| Operating Temperature Range | −40 | +85 | °C | ||
| Storage Temperature Range | −65 | +105 | °C |
Key Features
- Precision Monitoring: Monitors power supplies with precision, supporting +5.0 V, +3.3 V, +3.0 V, and +2.5 V systems with various threshold levels.
- Output Configurations: Features a push-pull RESET output that is active LOW.
- Transient Immunity: Protects against brownout failures and ignores fast transients on the power supply.
- Low Power Consumption: Supply current as low as 6 μA.
- Industrial Temperature Range: Operates over a temperature range of −40°C to +85°C.
- Compact Packaging: Available in SOT-23 and SC-70 packages.
- Pb-Free and RoHS Compliant: Environmentally friendly and compliant with regulatory standards.
Applications
- Computers, Servers, Laptops: Ensures reliable operation in various computing environments.
- Wireless Communications: Used in wireless communication devices to monitor power supply integrity.
- Embedded Control Systems: Suitable for embedded systems requiring precise power monitoring.
- White Goods, Power Meters: Applied in household appliances and power measurement devices.
- Intelligent Instruments: Used in intelligent instruments and industrial control systems.
- PDAs and Handheld Equipment: Ensures reliable power supply in portable devices.
Q & A
- What is the primary function of the CAT809ZTBI-GT3?
The primary function is to monitor the power supply voltage and generate a reset signal if the voltage falls below a preset threshold.
- What type of RESET output does the CAT809ZTBI-GT3 have?
The CAT809ZTBI-GT3 features a push-pull RESET output that is active LOW.
- What are the supported voltage thresholds for the CAT809 series?
The CAT809 series supports various voltage thresholds including +5.0 V, +3.3 V, +3.0 V, and +2.5 V with different suffix designations.
- How does the CAT809ZTBI-GT3 handle power supply transients?
The device ignores fast transients on the power supply and protects against brownout failures.
- What is the operating temperature range of the CAT809ZTBI-GT3?
The operating temperature range is −40°C to +85°C.
- What are the package options for the CAT809ZTBI-GT3?
The device is available in SOT-23 and SC-70 packages.
- Is the CAT809ZTBI-GT3 Pb-Free and RoHS compliant?
Yes, the device is Pb-Free and RoHS compliant.
- What is the typical supply current of the CAT809ZTBI-GT3?
The typical supply current is around 15 μA.
- 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-down resistor configuration for the RESET pin when VCC is under 1.0 V?
A pull-down resistor greater than 10 kΩ between the RESET pin and GND is recommended.
