Unbuffered DIMMs are the ideal module for high-speed, low-cost computer
systems. Our UDIMMs come in SDRAM, DDR, DDR2, and DDR3 solutions and offer data
rates as high as 1333 MT/s, and provide parity and ECC capability. They’re an
industry standard in high-volume production, offering a great balance of price
and performance.
DDR2-1066 and DDR3-1333: Fast Data Rate Memory
Our DDR2-1066 and DDR3-1333 memory boasts some of the fastest data rates in the business—easily meeting industry demand for increased speeds and improved bandwidth. And because of our manufacturing efficiencies, the DDR2 and DDR3 UDIMMs we build offer some of the most compelling value in the industry today.
JEDEC Compatibility
Our UDIMMs are easy to design with, easy to upgrade, and JEDEC compatible. Regardless
of which JEDEC UDIMM specification you design to—DDR2 UDIMM Design Specification
1.0 or DDR3 UDIMM Design Specification 0.81, for example—our parts meet
it.
Detailed, Specific Tech Support for UDIMMs
We offer multistage technical assistance in the form of savvy application and
field engineers; reams of technical notes and data sheets; and abundant simulation
models, calculators, and development tools. These resources are here so you
can design in a Micron UDIMM with ease.
Extended Temperature Range
Our UDIMMs have a wide operating range, including some solutions that work at temperatures of –40°C to +85°C, helping your application can thrive in rugged environments.
RoHS Options
We provide a full offering RoHS 6/6-compliant UDIMMs. But did you know we also
maintain a full set of 5/6-compliant products for industries that have exempt
applications so you can get the solutions you need when you need them.
Features
Benefits
Wide Density Range
With many density choices—32MB to 4GB—in a small form factor, you can build powerful devices in a limited amount of space
Optional ECC
Our ECC-enabled UDIMMs seek out and correct single-bit errors for you, boosting data reliability
More RoHS Choices
Both RoHS 6/6 and 5/6 compliant modules
Simulation Models
Our convenient thermal and electrical simulation models are available online for easy download
UDIMM Raw Card A0:
Raw Card A is a single-bank, single-sided PCB for use with x8 DDR SDRAM components
11/2001
1MB
UDIMM Raw card B1:
Project: Unbuffered Raw Card B (x8-based dual-bank x64/x72)
11/2001
2MB
UDIMM Raw Card C2:
Implemented: Unbuffered Raw Card C2
This release added series stub resistors for the C/A signals and incorporated design changes based on feedback and hardware analysis of Raw Card C
Thermal Applications:
Defines a general method and criteria for measuring and ensuring that Micron components and modules do not exceed the maximum allowable temperature
TN-00-08
5/2010
258KB
Recommended Soldering Parameters:
Defines the recommended soldering techniques and parameters for
Micron Technology, Inc., products.
Understanding Signal Integrity:
Describes how memory design, test, and verification tools can be used to the greatest advantage, from conception of a new product through end of life
TN-00-20
12/2009
2MB
Memory Module Serial Presence-Detect:
Describes how SPD is essential in helping to standardize the configuration, timing, and manufacturing information of memory modules
ESD Precautions for Die/Wafer Handling and Assembly:
Describes the benefits of controlling ESD in the workplace, including higher yields and improved
quality and reliability, resulting in reduced manufacturing costs.
Environmental Programs:
Describes the environmental programs at Micron, including air quality, pollution prevention, reclamation and reuse, and waste recycling and reduction.
Moisture Absorption in Plastic Packages:
Describes shipping procedures for preventing memory devices from absorbing moisture and recommendations for baking devices exposed to excessive moisture
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Can Vtt and Vref be supplied by the same supply in my system design?
With proper decoupling this can be an acceptable design. However, Micron recommends ensuring all supplies are separated. Vref tends to have more noise on it because it supplies signals that are regularly switching. A robust design would typically not connect these supplies due to the possibility of introducing this noise onto the Vtt plane which should be as stable as possible. Additionally, Vref requires much less current than Vtt.
Is there a set of trace lengths and routing rules that are standard for use when designing a system that uses a specific module technology and form factor?
No. A robust memory subsystem design that includes the use of 1 or more memory modules must be simulated in order to determine the optimum trace lengths, terminations. However, our design guides such as TN-47-01 and TN-41-08 have some best practices and design examples based on some typical system assumptions. This information is not meant to be the only way your system can be designed. It is a starting point and moreover an example of the steps used to determine the best design for your system.
We recently completed our acquisition of Numonyx, bringing together decades of engineering innovation and one of the richest portfolios of memory solutions to give our customers choice and flexibility.
We look forward to the opportunities this acquisition brings. In fact we’re already hard at work to integrate the products, support, and technical information on our Website — so if you’re looking for information or support for Numonyx products, just use the "Navigate Numonyx" tab above.