Overview
The N84C161WD28TG from onsemi is a comprehensive memory and supervisory solution designed for microcontroller-based systems. This device integrates a 16-Kb serial EEPROM memory, a system power supervisor with brownout protection, and a watchdog timer, all implemented in low power CMOS technology. The memory interface is accessed via an I²C bus, making it compatible with a wide range of microcontrollers and other ICs.
The device features a 1.6-second watchdog circuit that resets the system to a known good state in case of software or hardware glitches. It also includes a power supply monitor and reset circuit that protects the system during power-up, power-down, and brownout conditions. The reset circuit supports multiple threshold voltages for 5.0 V, 3.3 V, and 3.0 V systems.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer | ON Semiconductor | Technology | Si |
| Package | 8-pin SOIC | Mounting Style | SMD/SMT |
| Operating Voltage | 2.7 V to 6.0 V | 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 |
| I²C Bus Frequency | 400 kHz | Program/Erase Cycles | 1,000,000 |
| Data Retention | 100 years | Temperature Range | Commercial and Industrial |
| Watchdog Timer | 1.6 seconds | Write Protect Pin | WP |
| Reset Signals | Active High or Low | Manual Reset Capability | Yes |
Key Features
- 400 kHz I²C bus compatible
- Low power CMOS technology
- 16-byte page write buffer
- Built-in inadvertent write protection
- VCC lock out and write protection pin (WP)
- Precision power supply voltage monitor with five threshold voltage options
- Active high or low reset signals
- Manual reset capability
- 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/BFR-free, and RoHS compliant
Applications
- Industrial control systems
- Medical systems
- Mass storage devices
- Printers
- Automotive systems
- Telecommunication equipment
Q & A
- What is the primary function of the N84C161WD28TG?
The N84C161WD28TG is a memory and supervisory solution that integrates a 16-Kb serial EEPROM, a system power supervisor, and a watchdog timer for microcontroller-based systems.
- What is the operating voltage range of the N84C161WD28TG?
The device operates within a voltage range of 2.7 V to 6.0 V.
- What is the purpose of the watchdog timer in the N84C161WD28TG?
The watchdog timer resets the system to a known good state if a software or hardware glitch halts or 'hangs' the system, ensuring system reliability.
- How does the power supply monitor and reset circuit work?
The power supply monitor and reset circuit 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 are the reset threshold voltage options for the N84C161WD28TG?
The device supports 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.
- What is the significance of the write protect pin (WP) in the N84C161WD28TG?
The write protect pin (WP) allows for hardware data protection by making the entire memory array read-only when tied high.
- What are the package options for the N84C161WD28TG?
The device is available in 8-pin DIP and 8-pin SOIC packages.
- Is the N84C161WD28TG RoHS compliant?
Yes, the device is Pb-free, halogen-free/BFR-free, and RoHS compliant.
- What is the data retention period of the N84C161WD28TG?
The device has a data retention period of 100 years.
- Can the N84C161WD28TG be used for manual reset?
Yes, the reset pin can be used as a debounced input for push-button manual reset capability.
