W634GU8QB-11 TR

Memory IC Overview

The W634GU8QB-11 TR is a 4 Gbit DDR3L SDRAM manufactured by Winbond Electronics. It features an organization of 64M x 8 banks x 8 bits and operates at a maximum clock frequency of 933 MHz, compliant with the DDR3L-1866 specification. The device supports a supply voltage range of 1.283 V to 1.45 V for both VDD and VDDQ, with backward compatibility to 1.5 V. It utilizes a VFBGA-78 package (8x10.5 mm) and includes features such as programmable CAS latency, on-die termination, and write leveling.

Memory IC Feature Summary

• Supports double data rate architecture with eight internal banks for concurrent operations.
• Includes dynamic ODT mode and ZQ calibration for improved signal integrity.
• Features Multi Purpose Register (MPR) for system timing calibration via write leveling.
• Provides asynchronous reset functionality for power-up initialization.

Memory IC Applications

• High-speed data buffering in network communication equipment
• Memory subsystems in industrial control systems
• Embedded storage solutions requiring low power consumption

Memory IC Procurement Notes

Verify the specific speed grade suffix (-11) against the required operating frequency and temperature range during procurement. Confirm that the 'TR' designation indicates tape and reel packaging suitable for automated assembly processes. Ensure compliance with RoHS standards and check for any recent product change notifications or end-of-life notices from the manufacturer before finalizing orders.

Memory IC Selection Notes

Select this component when a 4 Gbit density with an 8-bit data bus width is required for space-constrained designs using the VFBGA-78 package. Consider the -11 speed grade for applications needing up to 933 MHz operation. Evaluate the need for industrial temperature ratings if operating environments exceed standard commercial limits, potentially selecting variants with 'I' or 'J' suffixes instead.

Memory IC Part Context

This part belongs to the W634GU8QB series of DDR3L SDRAMs designed for high-performance embedded applications. The series offers various speed grades and temperature ranges to accommodate different system requirements. As a low-voltage device, it contributes to energy efficiency in modern electronic systems compared to traditional 1.5V DDR3 counterparts.

Memory IC Replacement Considerations

Direct substitutes within the same family include W634GU8QB-09 for higher speeds or W634GU8QB-12/15 for lower frequencies. Industrial temperature versions are available as W634GU8QB11I. Verify pinout and electrical characteristics match before substitution.

Memory IC FAQ

What is the maximum operating frequency for the W634GU8QB-11?

The W634GU8QB-11 supports a maximum operating frequency of 933 MHz, corresponding to the DDR3L-1866 speed bin.

Does the W634GU8QB support backward compatibility with 1.5V DDR3?

Yes, the device is backward compatible with 1.5V DDR3 SDRAM VDD/VDDQ requirements, allowing operation at 1.5V ± 0.075V.