W631GU8MB-15

Memory IC Overview

The W631GU8MB-15 is a 1 Gbit DDR3L SDRAM organized as 16M x 8 with eight internal banks. It supports a maximum operating frequency of 667 MHz and operates within a voltage range of 1.283 V to 1.45 V, while maintaining backward compatibility with 1.5 V supplies. The device utilizes a VFBGA-78 package and features an asynchronous reset pin for initialization.

Memory IC Feature Summary

• Supports double data rate architecture with two data transfers per clock cycle.
• Includes programmable on-die termination (ODT) for improved signal integrity.
• Features ZQ calibration for output driver and ODT adjustment using external reference resistors.
• Provides system-level timing calibration support via write leveling and Multi Purpose Register (MPR).

Memory IC Applications

• Industrial embedded systems requiring extended temperature operation
• Consumer electronics utilizing low-power memory interfaces
• Communication equipment needing high-speed data transfer capabilities

Memory IC Procurement Notes

Verify the specific speed grade suffix against the required operating frequency and temperature range. Confirm that the ordering suffix matches the desired thermal specification, as industrial grades differ from commercial variants. Ensure the component meets RoHS compliance requirements for your assembly process.

Memory IC Selection Notes

Select this part when a 1 Gbit capacity with an 8-bit data bus width is required. Choose the -15 suffix specifically for applications operating at or below 667 MHz. Consider the VFBGA-78 package dimensions for PCB layout constraints and ensure the design supports differential clock inputs.

Memory IC Part Context

This component belongs to the W631GU8MB family of DDR3L SDRAMs manufactured by Winbond Electronics. The family includes various speed grades ranging from DDR3L-2133 to DDR3L-1333, differentiated by their maximum operating frequencies and timing parameters. All variants share the same physical organization and package type.

Memory IC Replacement Considerations

W631GU8MB-15I

Memory IC FAQ

What is the maximum operating frequency for the W631GU8MB-15?

The maximum operating frequency is 667 MHz, corresponding to the DDR3L-1333 speed bin.

Does the W631GU8MB-15 support 1.5V operation?

Yes, the device is backward compatible to 1.5V operation in addition to its standard 1.35V DDR3L voltage range.