Overview
The CAT1161WI-42-T3, produced by onsemi, is a comprehensive supervisory circuit designed for microcontroller-based systems. This device integrates a 16K I2C serial CMOS EEPROM, a precision reset controller, and a watchdog timer. It is particularly suited for applications requiring robust memory and system supervision during power-up, power-down, and brownout conditions.
The CAT1161WI-42-T3 operates within a voltage range of 2.7 V to 6 V, making it compatible with 5 V, 3.3 V, and 3 V systems. It features low power CMOS technology and provides hardware data protection through a write protect pin and a VCC sense circuit.
Key Specifications
| Parameter | Minimum | Maximum | Units |
|---|---|---|---|
| Temperature Under Bias | –55 | +125 | °C |
| Storage Temperature | –65 | +150 | °C |
| Voltage on any Pin with Respect to Ground | –2.0 | VCC + 2.0 | V |
| VCC with Respect to Ground | –2.0 | 7.0 | V |
| Package Power Dissipation Capability (TA = 25°C) | 1.0 | W | |
| Lead Soldering Temperature (10 sec) | 300 | °C | |
| Output Short Circuit Current | 100 | mA | |
| Clock Frequency | 100 | 400 | kHz |
| Reset Threshold (VCC = 4.25 V to 4.50 V) | 4.25 | 4.50 | V |
| Power-Up Reset Timeout | 130 | 270 | ms |
Key Features
- Watchdog Monitors SDA Signal (CAT1161)
- 400 kHz I2C Bus Compatible
- 2.7 V to 6 V Operation
- 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
- Precision Power Supply Voltage Monitor
- Five Threshold Voltage Options
- 1,000,000 Program/Erase Cycles
- Manual Reset Capability
- 100 Year Data Retention
- 8-Pin DIP or 8-Pin SOIC Packages
- Commercial and Industrial Temperature Ranges
- Pb-Free, Halogen Free/BFR Free, and RoHS Compliant
Applications
The CAT1161WI-42-T3 is ideal for various microcontroller-based systems that require reliable memory and supervisory functions. These include:
- Embedded Systems
- Industrial Control Systems
- Automotive Electronics
- Medical Devices
- Consumer Electronics
- Any system requiring robust power supervision and data protection
Q & A
- What is the primary function of the CAT1161WI-42-T3?
The CAT1161WI-42-T3 serves as a supervisory circuit with integrated 16K I2C serial CMOS EEPROM, precision reset controller, and watchdog timer for microcontroller-based systems.
- What voltage range does the CAT1161WI-42-T3 operate within?
The device operates within a voltage range of 2.7 V to 6 V.
- What types of packages are available for the CAT1161WI-42-T3?
The device is available in 8-pin DIP and 8-pin SOIC packages.
- What is the purpose of the watchdog timer in the CAT1161WI-42-T3?
The watchdog timer ensures the system returns to a known good state if a software or hardware glitch halts or 'hangs' the system.
- How does the reset controller function in the CAT1161WI-42-T3?
The reset controller protects the system during power-up, power-down, and brownout conditions by generating reset signals when the power supply voltage is out of tolerance.
- What is the data retention period of the CAT1161WI-42-T3?
The device offers 100 years of data retention.
- Is the CAT1161WI-42-T3 environmentally friendly?
Yes, the device is Pb-Free, Halogen Free/BFR Free, and RoHS Compliant.
- What is the significance of the write protect pin (WP) in the CAT1161WI-42-T3?
The write protect pin (WP) provides hardware data protection by preventing writes to the memory when tied to VCC.
- Can the CAT1161WI-42-T3 be used in industrial temperature ranges?
Yes, the device supports both commercial and industrial temperature ranges.
- How many program/erase cycles does the CAT1161WI-42-T3 support?
The device supports up to 1,000,000 program/erase cycles.
- Can the reset pin be used for manual reset?
Yes, the reset pin can be used as a debounced input for pushbutton manual reset capability.
