RLDRAM® Memory Beats DDR3 for Sustainable High Bandwidth
RLDRAM II memory definitely has its advantages for networking applications. For starters, it beats even leading-edge DDR3 for sustainable high bandwidth. It is, after all, a memory device that was originally conceived and designed for networking and L3 cache, high-end commercial graphics, and other applications that require back-to-back READ/WRITE operations or completely random access.
How does RLDRAM memory deliver this kind of performance-critical bandwidth? Significantly lower latency, for one, is a key enabler of random access. Ultra-low bus turnaround time enables higher sustainable bandwidth with near-term balanced read-to-write ratios. And a separate I/O feature reduces turnaround time even further and provides 100% data bus utilization at 1:1 read-to-write ratios. Then there’s bank scheduled auto refresh, which improves bandwidth by enabling the controller to hide refresh commands behind normal operation. And lastly, RLDRAM memory offers more burst length options—2-, 4-, and 8-bit bursts—than DDR3.
And that’s just the bandwidth angle. We have a lot more product information that details what RLDRAM memory is; what it does; and how it does it better, faster, and at a lower cost compared to SRAM—and how it measures up against DDR3 as well. If you’re considering RLDRAM memory for your design, you can find out how easily it can be implemented by downloading our RLDRAM II Memory Design Guide. Or, if you want specific part information, you can compare RLDRAM part types and product features using our configurable part catalog.
And when you’re ready to order parts, our preferred RLDRAM distributor is the way to go. Phoenics Electronics works closely with our RLDRAM memory ecosystem partners, so you get all the technical expertise you need—plus an easy purchasing process.
RLDRAM Part Catalog and Documentation
Networking-Focused Features Galore
RLDRAM memory combines several pretty cool features in order to do what it does for networking applications. If you’re interested in seeing what those features are and how they all come together, our RLDRAM II Feature Set technical note is an excellent place to start.
Download our tech note: Exploring the RLDRAM II Feature Set
If your networking app craves sustained high bandwidth, RLDRAM memory is sure to satisfy. Its ultra-low bus turnaround time, low tRC, separate I/O option, bank scheduled auto refresh, and burst length options help maximize bandwidth performance. For detailed information about how RLDRAM memory stacks up and stands out compared to other DRAM technologies, see our tech note, Exploring the RLDRAM II Feature Set.
RLDRAM memory delivers when it comes to low latency. At 15–20ns, it’s significantly lower than what you’ll get with competing DRAM technologies, which typically much higher latency—about 55ns. That's a more than three-fold difference; a performance advantage that's tough to pass up.
RLDRAM® Memory Features and Benefits
| | Features | Benefits |
| Densities |
288Mb, 576Mb |
Available in two densities, providing flexibility for many designs |
| Configurations |
x9, x18, x36 |
Available in wide bus widths with minimal part counts in wide-bus configured systems; common or separate I/O |
| Supply Voltages |
1.8V core; 1.5V or 1.8V I/O |
HSTL and SSTL I/O compatibility |
| Clock Frequencies |
200–533 MHz |
Achieves 400–1,067 Mb/s per pin |
| Temperature Ranges |
0°C to +95°C
–40°C to +95°C |
Increased operating range for optimum functionality in extreme environments |
| Latency |
tRC = 15–20ns |
Fast random access |
| Bandwidth |
Up to 38.4 Gb/s |
High sustainable performance |
| Improved Signal Integrity |
Programmable Output Impedance |
Enables clean, high-frequency operation |
| Addressing |
Multiplexed/Non-Multiplexed Address Modes |
Adds flexibility to board design |
| Fault Detection |
JTAG Boundary Scan |
Essential for testing boards with a high number of components |
5 Ways Micron's RLDRAM Memory Delivers More
Wide Bus
Wide bus widths are achievable with minimal part counts.
High Speed
Simple, effective, flexible termination options enable high-speed designs.
Built for Networking
High density, high bandwidth, and low latency deliver ultra-quick response times and fast random access.
Extended Temperature
A wider operating range of –40°C to +95°C ensures optimum functionality in extreme environments.
RoHS 5/6 and 6/6
A complete portfolio of RoHS 6/6-compliant RLDRAM parts, plus a full set of 5/6-compliant products for those industries with exempt applications, gives customers a choice.
Why Buy Micron?
- Technology Leader
Micron's manufacturing efficiencies, cutting-edge innovations, and leading patent portfolio lead the industry in technological excellence.
- Product Breadth
With a full line of DRAM components, modules, and NAND Flash products, we have the right device for your design.
- Technical Support
Micron's engineering and technical assistance can provide the competitive advantage you need to get your designs to market faster.
- Quality Products
Stringent quality and reliability testing makes our devices stand out as some of the highest-quality parts in the industry.
- Customer Commitment
We work closely with other vendors, manufacturers, and enablers to help you deliver a complete, proven solution.
- Environmental Certification
All devices are available in Pb-free versions, and many offer the added environmental protection of "green" packaging.