Overview
The CAT1021WI-30-G, produced by onsemi, is a comprehensive supervisory circuit designed for microcontroller-based systems. This device integrates a 2k-bit I2C EEPROM memory and a system power supervisor with brown-out protection, all within a low-power CMOS technology. It features precision VCC sense circuitry, watchdog timer, and both active high and low reset outputs. The CAT1021WI-30-G is particularly suited for systems requiring robust power monitoring and memory management.
Key Specifications
| Parameter | Units | Min | Max | |
|---|---|---|---|---|
| Operating Temperature | °C | -40 | 85 | |
| Supply Voltage (VCC) | V | 2.7 | 5.5 | |
| Reset Threshold Voltage (CAT1021WI-30-G) | V | 3.00 | 3.15 | |
| Watchdog Timer Period | s | 1.6 | ||
| I2C Bus Frequency | kHz | 400 | ||
| EEPROM Capacity | bits | 2048 | ||
| Package Type | SOIC-8 | |||
| Program/Erase Cycles | 1,000,000 | |||
| Data Retention | years | 100 |
Key Features
- Precision power supply voltage monitor with five threshold voltage options (supporting 5 V, 3.3 V, and 3 V systems)
- Watchdog timer with a 1.6 second period
- Active high and low reset outputs with valid reset guaranteed at VCC = 1 V
- 400 kHz I2C bus interface
- Low power CMOS technology
- 16-byte page write buffer
- Built-in inadvertent write protection (WP pin for CAT1021)
- Manual reset input
- 100-year data retention
- Industrial and extended temperature ranges
- Pb-free, RoHS-compliant packages (SOIC, TSSOP, MSOP, TDFN)
Applications
The CAT1021WI-30-G is ideal for various microcontroller-based systems that require robust power monitoring and memory management. It is particularly useful in:
- Embedded systems needing reliable power supervision and memory storage.
- Industrial control systems where precise voltage monitoring is crucial.
- Automotive electronics that demand high reliability and low power consumption.
- Consumer electronics requiring integrated memory and supervisory functions.
Q & A
- What is the primary function of the CAT1021WI-30-G?
The CAT1021WI-30-G is a supervisory circuit that integrates a 2k-bit I2C EEPROM memory and a system power supervisor with brown-out protection.
- What are the supported supply voltage ranges for the CAT1021WI-30-G?
The device operates within a supply voltage range of 2.7 V to 5.5 V.
- What is the reset threshold voltage for the CAT1021WI-30-G?
The reset threshold voltage for the CAT1021WI-30-G is between 3.00 V and 3.15 V.
- How does the watchdog timer function in the CAT1021WI-30-G?
The watchdog timer resets the system to a known state if software or a hardware glitch halts or 'hangs' the system, with a period of 1.6 seconds.
- What is the I2C bus frequency supported by the CAT1021WI-30-G?
The device supports a 400 kHz I2C bus frequency.
- What is the capacity of the EEPROM in the CAT1021WI-30-G?
The EEPROM capacity is 2k bits.
- What are the available package types for the CAT1021WI-30-G?
The device is available in SOIC-8, TSSOP, MSOP, and TDFN packages.
- How many program/erase cycles does the CAT1021WI-30-G support?
The device supports up to 1,000,000 program/erase cycles.
- What is the data retention period for the CAT1021WI-30-G?
The data retention period is 100 years.
- Is the CAT1021WI-30-G RoHS-compliant?
Yes, the device is Pb-free and RoHS-compliant.
