M48T02-150PC1

Product Overview

Category: Integrated Circuit (IC)

Use: Real-Time Clock (RTC) and Non-Volatile RAM (NVRAM)

Characteristics: - Low-power CMOS technology - 2K x 8-bit organization - Battery-backed operation - Automatic power-fail chip deselect and write protection - Data retention for more than 10 years - Industrial temperature range (-40°C to +85°C) - DIP package

Package/Quantity: Plastic Dual In-line Package (PDIP), 28 pins

Essence: The M48T02-150PC1 is a real-time clock and non-volatile RAM integrated circuit designed for applications that require accurate timekeeping and data storage even in the absence of power.

Specifications

• Memory Size: 2K x 8 bits
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: >10 years
• Clock Accuracy: ±2 minutes per month at 25°C
• Write Cycle Time: 10ms
• Standby Current: 100μA (typical)
• Active Current: 3mA (typical)

Pin Configuration

The M48T02-150PC1 has a total of 28 pins, which are assigned specific functions as follows:

| Pin No. | Pin Name | Function | |---------|----------|----------| | 1 | VCC | Power Supply (+5V) | | 2 | NC | No Connection | | 3 | A0 | Address Input | | 4 | A1 | Address Input | | 5 | A2 | Address Input | | 6 | A3 | Address Input | | 7 | A4 | Address Input | | 8 | A5 | Address Input | | 9 | A6 | Address Input | | 10 | A7 | Address Input | | 11 | CE | Chip Enable (Active Low) | | 12 | OE | Output Enable (Active Low) | | 13 | WE | Write Enable (Active Low) | | 14-21 | D0-D7 | Data Input/Output | | 22 | VBAT | Battery Backup Voltage | | 23-28 | NC | No Connection |

Functional Features

1. Real-Time Clock: The M48T02-150PC1 incorporates a built-in clock that accurately keeps track of time, including hours, minutes, and seconds.

2. Non-Volatile RAM: It provides non-volatile storage for critical data, ensuring data integrity even during power loss or system shutdown.

3. Battery Backup: The integrated battery backup feature allows the device to retain data and continue timekeeping functions when the main power supply is disconnected.

4. Automatic Power-Fail Chip Deselect: This feature ensures that the chip is deselected automatically during power failure, preventing any further write operations and protecting the stored data.

5. Write Protection: The M48T02-150PC1 offers write protection functionality to prevent accidental modification or erasure of stored data.

Advantages and Disadvantages

Advantages: - Accurate real-time clock functionality - Non-volatile data storage - Long data retention period - Low-power consumption - Industrial temperature range operation - Battery backup for uninterrupted operation

Disadvantages: - Limited memory capacity (2K x 8 bits) - Relatively slower write cycle time compared to some modern alternatives

Working Principles

The M48T02-150PC1 combines a real-time clock and non-volatile RAM in a single integrated circuit. It utilizes low-power CMOS technology to ensure efficient operation. The device is powered by a +5V supply, and it includes a battery backup feature to maintain data integrity during power loss.

The real-time clock component relies on an internal oscillator to accurately keep track of time. It provides hours, minutes, and seconds information, allowing precise timekeeping in various applications.

The non-volatile RAM section ensures that critical data remains intact even when the power supply is disconnected. This feature is particularly useful in systems where data retention is crucial, such as industrial control systems, medical devices, and security systems.

Detailed Application Field Plans

The M48T02-150PC1 finds applications in various fields, including:

1. Industrial Control Systems: The device can be used in programmable logic controllers (PLCs), automation systems, and other industrial control applications that require accurate timekeeping and non-volatile data storage.

2. Medical Devices: Real-time clock functionality is essential in medical equipment, such as patient monitoring systems,