Overview
The CAT1021WI-30-GT3 is a supervisory circuit with integrated 2k-bit I2C serial EEPROM, designed by onsemi. This device is a comprehensive solution for microcontroller-based systems, offering both memory and supervisory functions. It features a precision power supply voltage monitor, a watchdog timer, and manual reset capabilities, making it ideal for ensuring system integrity during power-up, power-down, and brownout conditions.
Key Specifications
| Parameter | Units | Min | Max | |
|---|---|---|---|---|
| VCC Operating Range | V | 2.7 | - | 5.5 |
| Reset Threshold Voltage (CAT1021WI-30-GT3) | V | 3.00 | 3.15 | - |
| Reset Output Valid VCC Voltage | V | - | - | 1.00 |
| I2C Bus Frequency | kHz | - | - | 400 |
| EEPROM Capacity | bits | - | - | 2048 |
| EEPROM Page Size | bytes | - | - | 16 |
| Watchdog Timer Period | s | - | - | 1.6 |
| Package Types | - | - | - | SOIC, TSSOP, MSOP, TDFN |
| Operating Temperature Range | °C | -40 | - | 85 |
Key Features
- Precision Power Supply Voltage Monitor: Supports 5 V, 3.3 V, and 3 V systems with five threshold voltage options.
- Watchdog Timer: 1.6 second watchdog timer to reset the system if software or hardware glitches occur.
- Active High or Low Reset: Provides both active high and low reset outputs.
- I2C Bus Interface: 400 kHz I2C bus for data transmission.
- Low Power CMOS Technology: Operates in low power mode.
- Manual Reset Input: Allows for manual reset via the MR pin.
- Write Protect Input (CAT1021): Disables write operations if WP is connected to a logic high.
- Data Retention: 100-year data retention.
- Package Options: Available in SOIC, TSSOP, MSOP, and TDFN packages.
Applications
The CAT1021WI-30-GT3 is suitable for a variety of applications, including:
- Microcontroller-based systems requiring supervisory and memory functions.
- Industrial control systems needing robust power monitoring and reset capabilities.
- Automotive and aerospace systems where reliable operation during power fluctuations is critical.
- Consumer electronics requiring low power and compact packaging.
Q & A
- What is the primary function of the CAT1021WI-30-GT3?
The primary function is to provide a supervisory circuit with integrated 2k-bit I2C serial EEPROM for microcontroller-based systems.
- What are the supported VCC operating ranges for this device?
The device operates within a VCC range of 2.7 V to 5.5 V.
- What is the reset threshold voltage for the CAT1021WI-30-GT3?
The reset threshold voltage is between 3.00 V and 3.15 V.
- How does the watchdog timer function?
The watchdog timer resets the system if the SDA line (or WDI for CAT1023) does not toggle within a 1.6 second interval.
- What types of packages are available for this device?
The device is available in SOIC, TSSOP, MSOP, and TDFN packages.
- What is the data retention period of the EEPROM?
The EEPROM has a 100-year data retention period.
- Can the CAT1021WI-30-GT3 be manually reset?
- Does the CAT1021WI-30-GT3 have write protection?
- What is the I2C bus frequency supported by this device?
The device supports a 400 kHz I2C bus frequency.
- Is the CAT1021WI-30-GT3 RoHS-compliant?
