Overview
The CAT823ZTDI-GT3, produced by onsemi, is a system supervisory voltage reset IC designed to provide essential reset and monitoring functions for electronic systems. This device is part of the CAT823 series, which includes various voltage monitoring and reset capabilities. It is particularly useful in ensuring that microprocessors and microcontrollers operate correctly under various power conditions, including power-up, power-down, and brownout scenarios.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage (VCC) | 1.2 | - | 5.5 | V |
| Reset Threshold (VRST) | 2.25 | 2.32 | 2.38 | V |
| Watchdog Timeout Period (tWD) | 1.12 | 1.60 | 3.20 | s |
| Manual Reset Input Voltage (VIL, VIH) | 0.3 x VCC | - | 0.7 x VCC | V |
| Operating Ambient Temperature | -40 | - | +85 | °C |
| Package Type | - | - | TSOT-23-5 | - |
Key Features
- Automatically restarts microprocessor after power failure
- Monitors pushbutton for external override
- Accurate under-voltage system monitoring
- Brownout detection system reset for use with 3.0, 3.3, and 5.0 V systems
- Pin and function compatible with the MAX823/24 products
- Operating range from -40°C to +85°C
- Available in TSOT-23 5-lead package
- Pb-free, halogen-free/BFR-free, and RoHS compliant
- Manual reset input for alternative control of reset outputs
- Watchdog timer input to monitor system signals and issue resets if necessary
Applications
- Microprocessor and microcontroller-based systems
- Intelligent instruments
- Control systems
- Critical power monitors
- Portable equipment
Q & A
- What is the primary function of the CAT823ZTDI-GT3?
The primary function is to provide system supervisory voltage reset and monitoring for electronic systems, ensuring correct operation under various power conditions.
- What are the typical reset threshold voltages for the CAT823ZTDI-GT3?
The reset threshold voltages range from 2.25 V to 2.38 V.
- How does the watchdog timer function in the CAT823ZTDI-GT3 work?
The watchdog timer forces the reset output to go active if the watchdog input does not transition within a specified period (1.12 to 3.20 seconds).
- Can the watchdog timer be disabled?
- What is the purpose of the manual reset input?
The manual reset input allows for alternative control of the reset outputs by connecting it to a pushbutton or a processor signal.
- What is the operating temperature range of the CAT823ZTDI-GT3?
The operating temperature range is from -40°C to +85°C.
- Is the CAT823ZTDI-GT3 RoHS compliant?
- What package type is the CAT823ZTDI-GT3 available in?
The device is available in a TSOT-23-5 package.
- How does the device handle power-up and power-down scenarios?
The device maintains the reset output active for a minimum of 140 ms after power-up to allow the power supply and processor to stabilize, and it issues a reset if the voltage drops below the specified trip value during power-down.
- What are some common applications of the CAT823ZTDI-GT3?
