AS4C4M16S-6TINTR
| Part Description |
IC DRAM 64MBIT PAR 54TSOP II |
|---|---|
| Quantity | 31 Available (as of May 5, 2026) |
| Product Category | Memory |
|---|---|
| Manufacturer | Alliance Memory, Inc. |
| Manufacturing Status | Obsolete |
| Manufacturer Standard Lead Time | RFQ |
| Datasheet |
Specifications & Environmental
| Device Package | 54-TSOP II | Memory Format | DRAM | Technology | SDRAM | ||
|---|---|---|---|---|---|---|---|
| Memory Size | 64 Mbit | Access Time | 5.4 ns | Grade | Industrial | ||
| Clock Frequency | 166 MHz | Voltage | 3V ~ 3.6V | Memory Type | Volatile | ||
| Operating Temperature | -40°C ~ 85°C (TA) | Write Cycle Time Word Page | N/A | Packaging | 54-TSOP (0.400", 10.16mm Width) | ||
| Mounting Method | Volatile | Memory Interface | Parallel | Memory Organization | 4M x 16 | ||
| Moisture Sensitivity Level | 3 (168 Hours) | RoHS Compliance | ROHS3 Compliant | REACH Compliance | REACH Unaffected | ||
| Qualification | N/A | ECCN | EAR99 | HTS Code | 8542.32.0002 |
Overview of AS4C4M16S-6TINTR - 64Mbit Synchronous DRAM
The AS4C4M16S-6TINTR is a 64Mbit Synchronous DRAM (SDRAM) from Alliance Memory, Inc., organized as 4M x 16 bits. This parallel interface SDRAM operates at clock frequencies up to 166MHz with a 5.4ns access time, making it suitable for embedded systems, industrial controllers, and legacy equipment requiring reliable synchronous memory. Operating from a 3V to 3.6V supply and rated for -40°C to 85°C industrial temperature range, it provides stable performance in demanding environments.
Key Features
- Memory Architecture - 64Mbit capacity configured as 4M x 16-bit words, providing flexible data width for 16-bit bus systems and reducing component count in space-constrained designs.
- High-Speed Operation - 166MHz clock frequency with 5.4ns access time enables efficient data transfers for real-time control systems and embedded applications requiring responsive memory performance.
- Low Voltage Operation - 3V to 3.6V supply voltage reduces power consumption while maintaining compatibility with standard 3.3V logic systems commonly used in industrial and embedded designs.
- Industrial Temperature Range - -40°C to 85°C operating temperature ensures reliable operation in harsh industrial, automotive, and outdoor environments where temperature extremes are common.
- Compact Package - 54-TSOP II (0.400", 10.16mm width) package offers a proven footprint for PCB layouts while providing adequate pin count for parallel memory interfaces.
Typical Applications
- Industrial Control Systems - This SDRAM provides program and data storage for PLCs, motion controllers, and HMI systems where the extended temperature range ensures consistent operation in factory floor environments and the parallel interface simplifies integration with legacy microcontroller architectures.
- Embedded Computing - Serves as main memory for embedded processors in medical devices, test equipment, and instrumentation where the 64Mbit capacity handles operating system code and data buffers while the industrial temperature rating supports installation in non-climate-controlled enclosures.
- Legacy System Maintenance - Provides drop-in replacement memory for aging equipment and systems requiring parallel SDRAM, extending product lifecycles and supporting field repairs without requiring board redesigns.
- Telecommunications Infrastructure - Functions as buffer memory in networking equipment, routers, and base stations where synchronous operation aligns with system clocks and the industrial temperature specification supports outdoor cabinet installations.
Unique Advantages
- Proven SDRAM Technology: Synchronous DRAM architecture with established timing specifications simplifies firmware development and reduces integration risk compared to newer memory technologies requiring complex initialization sequences.
- Industrial Temperature Qualification: Full -40°C to 85°C operational range eliminates the need for thermal management in many industrial applications, reducing BOM costs and mechanical complexity.
- Standard Parallel Interface: Familiar parallel memory bus requires no specialized controllers or protocol stacks, enabling straightforward connection to microprocessors, FPGAs, and ASICs with standard memory interfaces.
- 3.3V Logic Compatibility: Voltage levels match widely-used 3.3V I/O standards without level shifters, simplifying board design and reducing component count in mixed-signal systems.
- Extended Availability: Alliance Memory specializes in maintaining availability of legacy memory products, providing sourcing stability for long-lifecycle industrial products and equipment requiring sustained spare parts support.
Why Choose AS4C4M16S-6TINTR?
The AS4C4M16S-6TINTR addresses the specific needs of industrial and embedded system designers who require reliable, proven memory technology rather than cutting-edge density or speed. Its combination of industrial temperature rating, standard parallel interface, and 3.3V operation makes it particularly well-suited for retrofit projects, long-lifecycle products, and applications where compatibility with existing architectures outweighs the need for latest-generation memory technology. Alliance Memory's focus on maintaining legacy product availability provides supply chain confidence for equipment manufacturers supporting installed bases.
This SDRAM is ideal for engineering teams maintaining existing product lines, designing industrial control systems, or developing embedded applications where proven reliability and straightforward integration reduce time-to-market and long-term support costs.
Get Started with AS4C4M16S-6TINTR
Contact our sales team to discuss your memory requirements, request technical documentation, or obtain pricing for your project quantities. Our applications engineers can assist with integration support, timing analysis, and sourcing strategies for your industrial or embedded design.
