IDT72T20118L4BB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Storage and Transfer
• Characteristics: High-speed, Low-power, Large capacity
• Package: L4BB (Quad Flat Package)
• Essence: Memory Controller
• Packaging/Quantity: 1 piece per package

Specifications

• Memory Type: Synchronous Dynamic Random Access Memory (SDRAM)
• Memory Size: 2 Megabytes (MB)
• Data Bus Width: 18 bits
• Clock Frequency: 133 Megahertz (MHz)
• Operating Voltage: 3.3 Volts (V)
• Access Time: 5 nanoseconds (ns)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The IDT72T20118L4BB IC has the following pin configuration:

1. VDDQ: Power Supply for I/O Buffers
2. DQ0-DQ17: Data Input/Output Pins
3. /CAS: Column Address Strobe
4. /RAS: Row Address Strobe
5. /WE: Write Enable
6. /CS: Chip Select
7. CLK: Clock Input
8. VSS: Ground

Functional Features

• Supports Burst Mode Operation
• On-chip Programmable Burst Length
• Auto Precharge Function
• Internal Self-Timed Write Cycle
• Power Down and Sleep Modes for Power Saving
• Built-in Error Detection and Correction (EDC) Mechanism

Advantages and Disadvantages

Advantages

• High-speed data transfer
• Low power consumption
• Large memory capacity
• Error detection and correction mechanism enhances data reliability
• Flexible burst mode operation for efficient data access

Disadvantages

• Limited memory size (2MB)
• Requires external memory controller for complete functionality
• Relatively high access time compared to newer memory technologies

Working Principles

The IDT72T20118L4BB is a memory controller IC designed to interface with SDRAM modules. It acts as an intermediary between the processor and the memory, managing data transfer and storage operations. The IC utilizes synchronous operation, where data is transferred in synchronization with a clock signal.

During read or write operations, the memory controller receives commands from the processor through various control pins such as /CAS, /RAS, /WE, and /CS. These commands specify the desired memory location and the type of operation to be performed.

The controller also handles burst mode operations, allowing for efficient sequential data access. It automatically precharges the memory cells after each burst, reducing latency and improving overall performance.

Additionally, the IDT72T20118L4BB incorporates an error detection and correction mechanism, which helps identify and correct bit errors that may occur during data transfer. This enhances the reliability of stored data.

Detailed Application Field Plans

The IDT72T20118L4BB is commonly used in various applications that require high-speed data storage and transfer. Some of the specific application fields include:

1. Networking Equipment: Routers, switches, and network servers often utilize the IDT72T20118L4BB to manage data buffering and caching.
2. Telecommunications Systems: Voice and data communication devices, such as PBX systems and VoIP gateways, benefit from the IC's fast and reliable memory management capabilities.
3. Industrial Control Systems: Automation equipment, robotics, and process control systems rely on the IDT72T20118L4BB for efficient data handling and storage.
4. Medical Devices: Advanced medical imaging systems, patient monitoring devices, and diagnostic equipment utilize the IC to ensure smooth data processing and storage.

Detailed and Complete Alternative Models

1. IDT72T20118L4B: Similar to the IDT72T20118L4BB, but available in a different package (L4B).
2. IDT72T20118L4BA: Offers the same functionality as the IDT72T20118L4BB, but with a different pin configuration (L4BA package).
3. IDT72T20118L4BC: Provides an alternative package option (L4BC) while maintaining the same specifications and features.

These alternative models offer flexibility in terms of package options, allowing users to choose the most suitable form factor for their specific application requirements.

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