AS4C4M16SA-5TCN

The AS4C4M16SA-5TCN from Alliance Memory is a 64-megabit Synchronous Dynamic RAM designed for systems requiring fast, reliable volatile memory. Built on proven SDRAM technology with a 4M x 16 memory organization, this device operates at 200MHz clock frequency with 4.5ns access time. The AS4C4M16SA-5TCN serves applications demanding moderate-density memory with parallel interfacing, including industrial controllers, networking equipment, and embedded computing platforms.

With a 3V to 3.6V supply voltage range and commercial temperature rating, this SDRAM provides designers with a balanced solution for cost-sensitive designs where proven SDRAM architecture meets current system requirements.

Key Features

• 64Mbit Capacity with 4M x 16 Organization - The device provides 64 megabits of volatile memory organized as 4 million words by 16 bits, allowing efficient data access for word-oriented processors and applications requiring 16-bit data bus architectures.
• 200MHz Clock Frequency - Operating at up to 200MHz, the AS4C4M16SA-5TCN delivers fast synchronous operation suitable for systems requiring reliable memory performance without the complexity of newer memory technologies.
• 4.5ns Access Time - The rapid 4.5-nanosecond access time ensures quick data retrieval, supporting time-sensitive operations in embedded systems and real-time applications.
• 3V to 3.6V Supply Voltage - The device operates with a standard 3.3V supply voltage range, compatible with common logic levels used in industrial and embedded systems, simplifying power supply design.
• Parallel Interface - The parallel memory interface provides straightforward integration with microcontrollers, DSPs, and FPGAs that support traditional parallel memory buses without requiring serial protocol overhead.
• 54-TSOP II Package - Housed in a 54-pin TSOP II package with 10.16mm width, the device offers a compact footprint for space-constrained PCB layouts while maintaining manufacturability for automated assembly.
• Commercial Temperature Range - Specified for 0°C to 70°C operation, the AS4C4M16SA-5TCN provides reliable performance across typical commercial and office environment temperature ranges.

Typical Applications

• Industrial Control Systems - This SDRAM provides working memory for PLCs, industrial PCs, and HMI panels where the commercial temperature range suits controlled factory environments and the parallel interface simplifies integration with legacy industrial controllers.
• Networking Equipment - Routers, switches, and network appliances benefit from the 64Mbit capacity for packet buffering and routing tables, with the 200MHz operation supporting moderate-throughput network processing tasks.
• Embedded Computing Platforms - Single-board computers and embedded systems utilize this SDRAM as main system memory, where the 4M x 16 organization matches 16-bit processor architectures and the parallel interface provides direct memory access without protocol overhead.
• Test and Measurement Instruments - Benchtop and portable instrumentation uses this memory for data acquisition buffers and waveform storage, where the fast access time enables real-time signal capture and the commercial temperature rating suits laboratory environments.
• Point-of-Sale and Terminal Systems - Retail terminals, kiosks, and payment systems incorporate this SDRAM for application memory and display buffers, with the 3.3V operation and proven SDRAM technology offering long-term availability for systems with extended deployment cycles.

Unique Advantages

• Proven SDRAM Technology: Using established synchronous DRAM architecture reduces design risk and provides a mature, well-understood memory solution with extensive controller support across microcontroller and FPGA platforms.
• Simplified BOM and Power Design: The single 3V to 3.6V supply voltage eliminates the need for multiple memory power rails, reducing power supply complexity and lowering overall bill-of-materials costs in cost-sensitive designs.
• Legacy System Compatibility: The parallel interface and SDRAM protocol ensure drop-in compatibility with existing designs using similar memory architectures, facilitating product updates and redesigns without major controller changes.
• Balance of Speed and Density: The 200MHz operation and 64Mbit capacity offer a practical middle ground for applications that have outgrown smaller memories but don't require the complexity or cost of higher-density DDR solutions.
• Standard Package Footprint: The 54-TSOP II package is a widely adopted industry-standard format with established PCB layout practices, reducing design time and supporting automated pick-and-place assembly with readily available tooling.
• Alliance Memory Long-Term Support: As an Alliance Memory product, the AS4C4M16SA-5TCN benefits from a supplier focused on memory component availability for industrial and embedded markets where extended product lifecycles are essential.

Why Choose the AS4C4M16SA-5TCN?

The AS4C4M16SA-5TCN is positioned for design teams seeking reliable, cost-effective volatile memory using proven SDRAM technology. This device suits industrial, embedded, and commercial applications where moderate memory density, parallel interfacing, and straightforward integration take priority over cutting-edge performance. The commercial temperature range and standard voltage operation make this SDRAM ideal for controlled-environment deployments where extreme temperature tolerance is not required but long-term component availability matters.

For system designers working on product refreshes, legacy system updates, or new designs targeting stable, mature memory technology, the AS4C4M16SA-5TCN delivers predictable performance with minimal integration complexity. Its active lifecycle status ensures ongoing availability for projects with multi-year production horizons.

Get Started with the AS4C4M16SA-5TCN

Ready to integrate the AS4C4M16SA-5TCN into your next design? Contact our sales team for pricing, availability, and volume quotes. Our technical support engineers can assist with integration questions, reference designs, and application-specific guidance to help you maximize the value of this SDRAM in your system architecture.