AS4C16M16SB-6TINTR
| Part Description |
IC DRAM 256MBIT LVTTL 54TSOP II |
|---|---|
| Quantity | 680 Available (as of May 5, 2026) |
| Product Category | Memory |
|---|---|
| Manufacturer | Alliance Memory, Inc. |
| Manufacturing Status | Active |
| Manufacturer Standard Lead Time | 4 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 | 12 ns | Packaging | 54-TSOP (0.400", 10.16mm Width) | ||
| Mounting Method | Volatile | Memory Interface | LVTTL | Memory Organization | 16M x 16 | ||
| Moisture Sensitivity Level | 3 (168 Hours) | RoHS Compliance | ROHS3 Compliant | REACH Compliance | REACH Unaffected | ||
| Qualification | N/A | ECCN | N/A | HTS Code | N/A |
Overview of AS4C16M16SB-6TINTR - 256Mbit LVTTL SDRAM
The AS4C16M16SB-6TINTR from Alliance Memory is a 256-megabit synchronous DRAM organized as 16M x 16, designed for applications requiring high-density memory with standard LVTTL logic compatibility. Built on proven SDRAM technology, this component delivers reliable performance across industrial temperature ranges with a 166MHz clock frequency and 5ns access time. It serves embedded systems, communications equipment, and data acquisition platforms where moderate density and wide operating temperature tolerance are essential.
Key Features
- Memory Architecture - 256Mbit capacity organized as 16M x 16 configuration, providing efficient data path width for 16-bit processors and controllers.
- LVTTL Interface - Standard LVTTL-compatible signaling simplifies integration with legacy and cost-sensitive designs without requiring level translation.
- Clock Performance - Operates at up to 166MHz clock frequency with 5ns access time and 12ns write cycle time for responsive data throughput.
- Power Supply - Single 3V to 3.6V supply voltage reduces power distribution complexity and aligns with common embedded system rails.
- Industrial Temperature Range - Rated for -40°C to 85°C ambient operation, ensuring reliable function in harsh environmental conditions.
- Package - Available in 54-pin TSOP II package with 10.16mm body width, a standard footprint for DRAM components in space-constrained designs.
Typical Applications
- Industrial Controllers - This SDRAM provides working memory for PLCs, motion controllers, and industrial automation systems where extended temperature tolerance ensures consistent operation in factory and outdoor installations.
- Communications Equipment - Serves as buffer memory in routers, switches, and telecom infrastructure where moderate density and proven SDRAM architecture support reliable packet processing and traffic management.
- Data Acquisition Systems - Stores sampled data in test and measurement instruments, data loggers, and monitoring equipment where the 16-bit organization efficiently handles ADC outputs and sensor streams.
- Embedded Computing - Functions as main memory in single-board computers and embedded processors requiring standard SDRAM with LVTTL compatibility for legacy system support.
- Legacy System Upgrades - Enables memory expansion or replacement in existing designs originally specified with SDRAM, maintaining compatibility while addressing component obsolescence.
Unique Advantages
- Drop-in LVTTL Compatibility: Eliminates level-shifting components when interfacing with legacy processors and FPGAs, reducing BOM cost and board complexity.
- Extended Temperature Operation: Industrial -40°C to 85°C rating qualifies this memory for outdoor installations, factory automation, and transportation systems without derating.
- Proven SDRAM Architecture: Leverages mature, well-understood synchronous DRAM technology with broad toolchain support and extensive field history, minimizing integration risk.
- Standard 16-bit Organization: Matches data path width of common microcontrollers and DSPs, optimizing memory efficiency without requiring external demultiplexing logic.
- Single-Rail Power: Operates from a single 3.3V supply, simplifying power distribution and avoiding the multi-rail requirements of some modern memory technologies.
- Active Lifecycle Status: Alliance Memory continues active production, providing supply chain stability and long-term availability for industrial and embedded deployments.
Why Choose AS4C16M16SB-6TINTR?
The AS4C16M16SB-6TINTR addresses the specific needs of industrial and embedded systems requiring reliable, moderate-density memory with proven technology. Its LVTTL interface preserves compatibility with existing system architectures while the industrial temperature rating ensures dependable operation in demanding environments. For engineers maintaining legacy platforms or designing cost-sensitive embedded systems, this component offers a practical balance of density, performance, and environmental tolerance.
This SDRAM is particularly well-suited for designs prioritizing long-term availability, straightforward integration, and operation across extended temperature ranges. Alliance Memory's focus on specialty and industrial memory products ensures continued support for applications where component longevity matters as much as performance specifications.
Get a Quote
Contact our sales team to discuss pricing, lead times, and volume availability for the AS4C16M16SB-6TINTR. Our technical support staff can assist with integration questions and provide additional documentation to support your design process.
