W631GU6KB15I

Memory IC Overview

The W631GU6KB is a 1Gbit DDR3L SDRAM organized as 8,388,608 words by 8 banks by 16 bits. It supports speeds up to DDR3L-1866 with a maximum operating frequency of 933 MHz. The device operates at a typical voltage of 1.35V (range 1.283V to 1.45V) and is backward compatible with 1.5V. It features an 8-bit prefetch architecture, differential clock inputs, and programmable CAS latency. Packaged in a lead-free WBGA-96 (9x13 mm), it includes ZQ calibration, on-die termination, and asynchronous reset capabilities.

Memory IC Feature Summary

• Supports double data rate architecture with two data transfers per clock cycle for high-speed performance.
• Features eight internal banks allowing concurrent operations to improve system efficiency.
• Includes dynamic on-die termination and ZQ calibration to enhance signal integrity.
• Provides write leveling and multi-purpose register support for system timing calibration.

Memory IC Applications

• High-performance embedded systems requiring low power consumption
• Industrial control terminals operating in wide temperature ranges
• Automotive electronics demanding reliable memory storage

Memory IC Procurement Notes

Verify the specific speed grade suffix (e.g., -11, 11I, -12, 12J) against your design requirements, as these determine the maximum frequency and operating temperature range. Confirm that the package type matches the PCB footprint, as variations exist within the family. Ensure the supplier provides RoHS compliance documentation and check for any product change notifications regarding material or assembly updates before finalizing orders.

Memory IC Selection Notes

Select the appropriate speed grade based on the target system clock frequency; higher grades like -11 support up to 933 MHz while lower grades like -15 are limited to 667 MHz. Choose industrial variants (suffix 'I') if the application requires operation below 0°C. Verify compatibility with existing 1.5V platforms if backward compatibility is necessary, noting that the device supports both 1.35V and 1.5V supply voltages.

Memory IC Part Context

This component belongs to the Winbond W631GU6 series of DDR3L SDRAMs. It utilizes a 16-bit data bus width and is designed for applications needing dense memory in a compact form factor. The device integrates standard DDR3L features such as auto-refresh and power-down modes, making it suitable for modern electronic designs transitioning from older DDR standards.

Memory IC Replacement Considerations

Direct replacements must match the 1Gb capacity, 16-bit width, and WBGA-96 package. Verify that alternative parts support the required speed bin and temperature range. Note that some similar parts may have different pinouts or electrical characteristics, so datasheet comparison is essential.

Memory IC FAQ

What is the difference between the 11I and 12J speed grades?

The 11I grade supports a maximum frequency of 933 MHz (DDR3L-1866) and operates from -40°C to 95°C. The 12J grade supports 800 MHz (DDR3L-1600) and offers an extended temperature range up to 105°C.

Does the W631GU6KB support 1.5V operation?

Yes, the device is backward compatible with 1.5V DDR3 SDRAM VDD/VDDQ requirements, supporting a voltage range of 1.425V to 1.575V in addition to its primary 1.35V operation.