AS4C4M32SA-7TCNTR

The AS4C4M32SA-7TCNTR is a 128-megabit synchronous DRAM (SDRAM) from Alliance Memory, organized as 4 million words by 32 bits. This parallel-interface memory device operates at clock frequencies up to 143MHz with a 5.4ns access time, making it well-suited for embedded systems, industrial controllers, and legacy system upgrades that require reliable, high-speed volatile memory with a wide data bus.

Built on proven SDRAM technology, this device provides cost-effective memory expansion for applications requiring moderate density and commercial temperature range operation. The 86-TSOP II package offers a standard footprint compatible with existing board designs.

Key Features

• Memory Architecture - 128Mbit capacity organized as 4M x 32, providing a 32-bit wide data path that reduces the number of devices needed for systems requiring wide data buses.
• Performance Specifications - 143MHz maximum clock frequency with 5.4ns access time and 2ns write cycle time, delivering reliable synchronous operation for time-sensitive embedded applications.
• Power Supply - Standard 3V to 3.6V operating voltage range simplifies integration into 3.3V logic systems without requiring level shifters or additional regulators.
• Temperature Range - 0°C to 70°C operating temperature supports deployment in standard commercial environments including office automation, networking equipment, and consumer electronics.
• Package Format - 86-pin TSOP II (10.16mm width) surface-mount package provides a compact footprint with industry-standard pinout for straightforward PCB layout and manufacturing.

Typical Applications

• Embedded Systems - This SDRAM provides main memory for microcontroller and microprocessor-based designs where the 32-bit organization matches processor bus widths, reducing component count and simplifying timing design.
• Industrial Controllers - The synchronous interface and moderate density support buffering and data processing in PLCs, motion controllers, and process automation systems operating within commercial temperature ranges.
• Networking Equipment - Suitable for packet buffering and routing table storage in switches, routers, and network interface cards where the parallel interface offers predictable latency for data handling.
• Legacy System Maintenance - Direct replacement or expansion option for existing designs built around parallel SDRAM technology, enabling product line extensions and field upgrades without board redesign.
• Medical Instrumentation - Provides data acquisition buffering and image processing memory for diagnostic equipment operating in controlled clinical environments where commercial-grade components are acceptable.

Unique Advantages

• Wide Data Bus Efficiency: The 4M x 32 organization minimizes the number of memory devices required for 32-bit processor systems, reducing board space, power consumption, and routing complexity compared to x8 or x16 configurations.
• Proven Technology Platform: SDRAM architecture offers mature, well-understood timing characteristics and broad industry support, reducing development risk and simplifying validation compared to newer memory technologies.
• Direct Drop-In Compatibility: Standard TSOP II package and pinout enable seamless integration into existing designs originally populated with similar SDRAM devices, supporting long-term product maintenance and manufacturing continuity.
• Cost-Optimized Capacity: 128Mbit density strikes a balance between sufficient memory for many embedded applications and competitive pricing, avoiding over-specification while meeting functional requirements.
• Simplified Power Design: Single 3V to 3.6V supply range eliminates the need for multiple voltage rails or complex power sequencing, reducing BOM costs and simplifying power distribution network design.
• Commercial-Grade Qualification: 0°C to 70°C temperature rating matches requirements for the majority of commercial and light industrial applications, providing appropriate reliability without the cost premium of extended-temperature or automotive-grade components.

Why Choose AS4C4M32SA-7TCNTR?

The AS4C4M32SA-7TCNTR addresses the ongoing need for parallel SDRAM in embedded and industrial systems where established architectures continue to drive value. For designs based on 32-bit processors or systems requiring straightforward memory expansion, this device offers a proven solution with predictable performance and industry-standard packaging. Alliance Memory's focus on legacy and mature memory technologies ensures continued availability for long product lifecycles.

This SDRAM is particularly valuable for engineering teams maintaining existing product lines, conducting running changes, or developing new variants of proven platforms. The combination of moderate density, wide data organization, and commercial-grade specifications makes it appropriate for applications where cutting-edge performance is less critical than reliability, cost-effectiveness, and design continuity.

Get a Quote Today

Contact our sales team to discuss your memory requirements and receive pricing for the AS4C4M32SA-7TCNTR. Our technical support staff can assist with integration guidance, timing specifications, and design recommendations to ensure successful implementation in your application.