Overview
The CAT1161WI30, produced by onsemi, is a comprehensive supervisory circuit designed for microcontroller-based systems. It integrates a 16K I2C serial CMOS EEPROM, a precision reset controller, and a watchdog timer. This device ensures robust system operation by providing memory write protection, power supply monitoring, and reset capabilities during power-up, power-down, and brownout conditions.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Operating Temperature Range | -40°C to 85°C | °C |
| Supply Voltage Range | 2.7 V to 6 V | V |
| EEPROM Capacity | 16K | bytes |
| EEPROM Interface | I2C Bus | |
| Watchdog Timer Period | 1.6 seconds | s |
| Reset Threshold Voltages | 4.50-4.75 V, 4.25-4.50 V, 3.00-3.15 V, 2.85-3.00 V, 2.55-2.70 V | V |
| Package Types | 8-pin DIP, 8-pin SOIC | |
| Program/Erase Cycles | 1,000,000 | cycles |
| Data Retention | 100 years | years |
| Clock Frequency | 100 kHz to 400 kHz | kHz |
Key Features
- Watchdog timer monitors SDA signal (CAT1161)
- 400 kHz I2C bus compatible
- Low power CMOS technology
- 16-byte page write buffer
- Built-in inadvertent write protection (VCC lock out, write protection pin WP)
- Active high or low reset signals
- Precision power supply voltage monitor with five threshold voltage options
- Manual reset capability
- 100-year data retention
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
The CAT1161WI30 is suitable for a variety of microcontroller-based systems, including industrial control systems, medical devices, automotive electronics, and any application requiring robust memory and supervisory functions. It is particularly useful in environments where power supply stability and system reliability are critical.
Q & A
- What is the primary function of the CAT1161WI30?
The CAT1161WI30 is a supervisory circuit that integrates a 16K I2C serial CMOS EEPROM, a precision reset controller, and a watchdog timer to ensure robust system operation. - What are the operating temperature and voltage ranges of the CAT1161WI30?
The operating temperature range is -40°C to 85°C, and the supply voltage range is 2.7 V to 6 V. - What types of packages are available for the CAT1161WI30?
The device is available in 8-pin DIP and 8-pin SOIC packages. - How does the watchdog timer function in the CAT1161WI30?
The watchdog timer monitors the SDA line and returns the system to a known good state if there is no transition on the SDA for more than 1.6 seconds. - What are the reset threshold voltage options for the CAT1161WI30?
The device offers five reset threshold voltage ranges: 4.50-4.75 V, 4.25-4.50 V, 3.00-3.15 V, 2.85-3.00 V, and 2.55-2.70 V. - How does the write protection feature work in the CAT1161WI30?
The device features a write protection pin (WP) and a VCC sense circuit that prevents writes to memory when VCC falls below the reset threshold or until VCC reaches the reset threshold during power-up. - What is the data retention period of the CAT1161WI30?
The device has a 100-year data retention period. - Is the CAT1161WI30 RoHS compliant?
Yes, the device is Pb-free, halogen-free/BFR-free, and RoHS compliant. - What is the clock frequency range of the I2C bus in the CAT1161WI30?
The clock frequency range is 100 kHz to 400 kHz. - Can the CAT1161WI30 be used for manual reset?
Yes, the reset pin can be used as a debounced input for pushbutton manual reset capability.
