AS4C64M4SA-6TINTR
| Part Description |
IC DRAM 256MBIT PAR 54TSOP II |
|---|---|
| Quantity | 1,908 Available (as of May 5, 2026) |
| Product Category | Memory |
|---|---|
| Manufacturer | Alliance Memory, Inc. |
| Manufacturing Status | Active |
| Manufacturer Standard Lead Time | 20 Weeks |
| Datasheet |
Specifications & Environmental
| Device Package | 54-TSOP II | Memory Format | DRAM | Technology | SDRAM | ||
|---|---|---|---|---|---|---|---|
| Memory Size | 256 Mbit | Access Time | 5 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 | 64M x 4 | ||
| Moisture Sensitivity Level | 3 (168 Hours) | RoHS Compliance | ROHS Compliant | REACH Compliance | REACH Unaffected | ||
| Qualification | N/A | ECCN | EAR99 | HTS Code | 8542.32.0024 |
Overview of AS4C64M4SA-6TINTR - 256Mbit Synchronous DRAM
The AS4C64M4SA-6TINTR is a 256Mbit synchronous dynamic RAM from Alliance Memory, Inc., organized as 64M x 4 bits and built on proven SDRAM technology. Designed for embedded systems and industrial applications requiring reliable parallel memory, this device operates at clock frequencies up to 166MHz with a fast 5ns access time. It delivers dependable performance across an extended temperature range while maintaining compatibility with standard 3.3V power supplies.
Key Features
- Memory Architecture - 256Mbit capacity organized as 64M x 4, providing flexible word width for x4 data bus implementations common in embedded controllers and communication systems.
- Performance - 166MHz clock frequency operation with 5ns access time enables fast data throughput for applications requiring responsive memory subsystems.
- Power and Voltage - Standard 3.3V supply voltage (3V to 3.6V range) simplifies integration with existing 3.3V logic families and reduces power conversion complexity.
- Industrial Temperature Range - Operates reliably from -40°C to 85°C, making it suitable for industrial equipment, automotive peripherals, and outdoor installations where temperature extremes are common.
- Package - Available in 54-pin TSOP II package with 10.16mm width, offering a compact footprint for space-constrained PCB designs.
Typical Applications
- Industrial Automation - Provides working memory for programmable logic controllers (PLCs), human-machine interfaces (HMIs), and motion control systems where extended temperature tolerance ensures consistent operation in factory floor environments.
- Embedded Computing - Serves as main memory in microprocessor-based systems, single-board computers, and communication processors where parallel SDRAM interfaces are standard and 256Mbit capacity meets system requirements.
- Networking Equipment - Functions as packet buffer memory in switches, routers, and network interface cards where synchronous operation aligns with system timing and parallel access supports high-bandwidth data paths.
- Test and Measurement Instruments - Enables data acquisition and waveform storage in oscilloscopes, logic analyzers, and automated test equipment where industrial temperature rating supports benchtop and field deployment.
- Medical Devices - Supports imaging systems, patient monitors, and diagnostic equipment requiring stable memory performance across varying ambient conditions in clinical settings.
Unique Advantages
- Proven SDRAM Technology: Leverages mature synchronous DRAM architecture with broad ecosystem support, simplifying hardware design and software driver development.
- Parallel Interface Compatibility: Direct connection to microprocessors and controllers with parallel memory buses eliminates protocol conversion overhead and reduces system latency.
- Extended Temperature Operation: Industrial temperature range reduces need for active cooling or environmental controls in demanding installations, lowering system cost and complexity.
- Standard Voltage Operation: 3.3V supply voltage aligns with common embedded system power rails, avoiding need for additional voltage regulators and simplifying power distribution.
- Compact TSOP II Packaging: Space-efficient form factor enables higher memory density on PCBs while maintaining manufacturability for standard SMT assembly processes.
- Active Lifecycle Status: Ongoing availability from Alliance Memory supports long product lifecycles typical of industrial and embedded applications, reducing redesign risk.
Why Choose AS4C64M4SA-6TINTR?
The AS4C64M4SA-6TINTR addresses the needs of industrial and embedded system designers who require dependable parallel SDRAM with extended environmental specifications. Its 256Mbit capacity balances memory size with cost-effectiveness for mid-range applications, while 166MHz operation and 5ns access time deliver sufficient performance for real-time control, data acquisition, and communication tasks. The device's industrial temperature rating and active lifecycle status make it particularly well-suited for equipment expected to operate for years in challenging environments.
By offering standard SDRAM functionality in an industrial-grade package, this component enables designers to leverage established memory architectures while meeting the durability and reliability requirements of professional equipment markets.
Get a Quote
Contact our sales team to discuss your memory requirements, request pricing for the AS4C64M4SA-6TINTR, or explore alternative Alliance Memory solutions for your application. Our technical support staff can assist with integration questions and provide additional documentation to support your design process.
