IS42S32400F-7TL

The IS42S32400F-7TL is a 128-megabit synchronous dynamic random access memory (SDRAM) device from ISSI, Integrated Silicon Solution Inc. Built with SDRAM technology, this volatile memory component features a 4M x 32 organization and operates at clock frequencies up to 143MHz. It serves embedded systems, industrial controllers, and computing applications requiring fast, cost-effective volatile memory with a standard parallel interface.

Key Features

• Memory Configuration - 128Mbit total capacity organized as 4 million words by 32 bits wide, providing efficient data access for 32-bit processor architectures and data bus widths.
• Clock Speed and Access Time - Supports clock frequencies up to 143MHz with 5.4ns access time, delivering responsive read and write operations for time-sensitive applications.
• Power Supply - Operates from 3V to 3.6V supply voltage, compatible with standard 3.3V logic systems and reducing power consumption compared to older 5V devices.
• Parallel Interface - Standard parallel memory interface enables straightforward integration with microprocessors, FPGAs, and memory controllers without additional protocol conversion.
• Package - Available in 86-pin TSOP II (Thin Small Outline Package) with 10.16mm width, a space-efficient surface-mount format widely used in embedded designs.
• Operating Temperature Range - Commercial temperature range of 0°C to 70°C (TA) suits standard indoor environments including office equipment and consumer electronics.

Typical Applications

• Embedded Systems - This SDRAM provides main memory for embedded controllers and processors where the 4M x 32 organization matches common 32-bit architectures, enabling efficient code execution and data buffering.
• Industrial Control Systems - Serves as working memory in programmable logic controllers (PLCs) and human-machine interfaces (HMIs) where the commercial temperature range and parallel interface support reliable operation in standard industrial environments.
• Data Buffering - Suitable for high-speed data acquisition and buffering applications where the 143MHz clock frequency and 5.4ns access time enable rapid data capture and temporary storage.
• Networking Equipment - Provides packet buffering and lookup table storage in routers and switches operating in controlled environments, where the volatile nature allows fast read/write cycles for dynamic routing information.
• Legacy System Upgrades - Offers a replacement or upgrade path for older systems designed around parallel SDRAM architectures, maintaining compatibility with existing memory controller designs.

Unique Advantages

• Standard Architecture Compatibility: The 4M x 32 organization aligns directly with 32-bit processor designs, simplifying memory controller configuration and reducing glue logic requirements.
• Proven SDRAM Technology: Synchronous DRAM provides predictable timing characteristics and well-documented interface specifications, reducing design risk and accelerating time-to-market.
• Cost-Effective Volatile Storage: SDRAM offers a lower-cost alternative to SRAM for applications that can tolerate refresh requirements but need more density than static RAM provides.
• Industry-Standard Footprint: The 86-TSOP II package is widely supported by PCB assembly equipment and design libraries, facilitating manufacturing and enabling second-source options.
• Moderate Speed Performance: The 143MHz operating frequency and 5.4ns access time balance performance with power consumption for applications that don't require the highest-speed memory interfaces.
• 3.3V Operation: Standard 3.3V supply voltage eliminates the need for voltage level translation in modern digital systems, simplifying power supply design.

Why Choose IS42S32400F-7TL?

The IS42S32400F-7TL offers a straightforward memory solution for designs requiring parallel SDRAM in a commercial temperature range. Its standard 4M x 32 organization and 86-TSOP II package make it suitable for embedded systems, industrial controls, and networking equipment where designers need proven technology with predictable performance characteristics. The 143MHz clock frequency provides adequate speed for many control and processing applications without the complexity or cost of higher-speed memory technologies.

This component is particularly well-suited for maintenance, repair, and upgrade projects involving legacy systems originally designed around parallel SDRAM architectures. The commercial temperature rating and standard voltage levels align with indoor equipment requirements, making it a practical choice for office, lab, and controlled industrial environments. Note that this product has an obsolete lifecycle status, so designers should confirm availability and consider alternative components for new long-term production designs.

Request a Quote

Contact our sales team to discuss availability, pricing, and technical support for the IS42S32400F-7TL. Our applications engineers can help you evaluate this memory solution for your specific design requirements and recommend alternatives if needed for new projects.