Overview
The CAT1161WI-42-GT3 is a supervisory circuit produced by onsemi, designed to ensure correct system operation during power-up, power-down, and brownout conditions. This device integrates a precision reset controller and a watchdog timer, making it suitable for a variety of applications requiring robust system supervision.
It features a 16-byte page write buffer and built-in inadvertent write protection, including VCC lockout and a write protect pin. The device is compatible with 400 kHz I2C bus and operates within a voltage range of 2.7 V to 6.0 V, making it versatile for different system configurations.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Supply Voltage | 2.7 to 6.0 | V |
| Reset Threshold Voltage | 4.25 to 4.50 | V |
| Reset Timeout | 200 ms | ms |
| Operating Temperature | -40 to 85 | °C |
| Package Type | 8-SOIC | |
| Number of Voltages Monitored | 1 | |
| Watchdog Timer | Monitors SDA signal | |
| Program/Erase Cycles | 1,000,000 | |
| Data Retention | 100 years | |
| RoHS Compliance | Yes |
Key Features
- 400 kHz I2C bus compatible
- Low power CMOS technology
- 16-byte page write buffer
- Built-in inadvertent write protection: VCC lockout and write protect pin (WP)
- Active high or low reset with open drain outputs
- Precision power supply voltage monitor with five threshold voltage options
- Manual reset capability with debounced input for pushbutton reset
- Watchdog timer monitors SDA signal (CAT1161 only)
- 1,000,000 program/erase cycles and 100-year data retention
- Available in 8-pin DIP and 8-pin SOIC packages
- Commercial and industrial temperature ranges
- Pb-free, halogen-free, and RoHS compliant
Applications
The CAT1161WI-42-GT3 is suitable for various applications requiring robust system supervision, including:
- Embedded systems needing precise reset and watchdog functions
- Industrial control systems requiring reliable power monitoring
- Automotive systems where robust supervision is critical
- Medical devices that demand high reliability and data integrity
- Consumer electronics requiring low power and high reliability
Q & A
- What is the operating voltage range of the CAT1161WI-42-GT3?
The operating voltage range is 2.7 V to 6.0 V.
- What types of reset signals does the CAT1161WI-42-GT3 support?
The device supports both active high and active low reset signals.
- What is the purpose of the watchdog timer in the CAT1161WI-42-GT3?
The watchdog timer monitors the SDA signal to ensure system operation and can be used to detect and respond to system malfunctions.
- What is the data retention period of the CAT1161WI-42-GT3?
The data retention period is 100 years.
- What are the available package types for the CAT1161WI-42-GT3?
The device is available in 8-pin DIP and 8-pin SOIC packages.
- Is the CAT1161WI-42-GT3 RoHS compliant?
Yes, the device is Pb-free, halogen-free, and RoHS compliant.
- What is the reset timeout period for the CAT1161WI-42-GT3?
The reset timeout period is typically 200 ms.
- How many program/erase cycles can the CAT1161WI-42-GT3 handle?
The device can handle 1,000,000 program/erase cycles.
- What is the operating temperature range of the CAT1161WI-42-GT3?
The operating temperature range is -40°C to 85°C.
- Does the CAT1161WI-42-GT3 support manual reset?
Yes, the device supports manual reset through the RESET or RESET pins.
