DS1218

Product Overview

• Category: Integrated Circuit
• Use: Memory Chip
• Characteristics: Non-volatile, Low-power, High-density
• Package: DIP (Dual In-line Package)
• Essence: Battery-backed SRAM
• Packaging/Quantity: 1 piece per package

Specifications

• Memory Size: 2 kilobits (256 x 8 bits)
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature: -40°C to +85°C
• Data Retention: Minimum 10 years
• Read/Write Cycle Endurance: 1 million cycles

Detailed Pin Configuration

The DS1218 has a total of 24 pins, which are configured as follows:

• Pin 1: Chip Enable (CE)
• Pin 2: Output Enable (OE)
• Pin 3: Write Enable (WE)
• Pin 4-11: Data Input/Output (D0-D7)
• Pin 12-19: Address Inputs (A0-A7)
• Pin 20: Ground (GND)
• Pin 21: VCC (+5V)
• Pin 22: Battery Input (VBAT)
• Pin 23: Battery Ground (BGND)
• Pin 24: Not Connected (NC)

Functional Features

• Battery-backed SRAM with non-volatile storage capability
• Low-power consumption during standby mode
• High-density memory storage for small-scale applications
• Easy integration into existing circuit designs
• Automatic switch to battery power during power loss

Advantages and Disadvantages

Advantages: - Non-volatile memory ensures data retention even during power loss - Low-power consumption extends battery life - High-density storage allows for compact designs - Easy integration into existing circuits

Disadvantages: - Limited memory size (2 kilobits) - Relatively higher cost compared to standard SRAM chips - Battery replacement required periodically

Working Principles

The DS1218 is a battery-backed SRAM chip that utilizes a small onboard battery to retain data even when the main power supply is disconnected. It combines the advantages of volatile SRAM and non-volatile storage, providing reliable data retention during power loss. The chip automatically switches to battery power when the main supply is interrupted, ensuring continuous operation.

Detailed Application Field Plans

The DS1218 is commonly used in applications where data integrity is crucial, such as:

1. Industrial control systems
2. Medical equipment
3. Automotive electronics
4. Data loggers
5. Security systems

Its ability to retain data during power interruptions makes it suitable for critical applications that require reliable and instant access to stored information.

Detailed and Complete Alternative Models

1. DS1216: Similar battery-backed SRAM chip with 4 kilobits memory size.
2. DS1230: Non-volatile SRAM chip with 256 kilobits memory size.
3. DS1220: Non-volatile SRAM chip with 16 kilobits memory size.
4. DS1245: Non-volatile SRAM chip with 1 megabit memory size.

These alternative models offer different memory sizes and features, allowing users to choose the most suitable option based on their specific requirements.

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