W971GG6NB-25

Memory IC Overview

The W971GG6NB-25 is a 1 Gbit DDR2 SDRAM organized as 8,388,608 words x 8 banks x 16 bits. It supports transfer rates up to 1066 Mbps and operates at a nominal voltage of 1.8 V ± 0.1 V for both VDD and VDDQ. The device utilizes an SSTL_18 interface and features differential clock inputs (CLK and CLK) synchronized with source-synchronous data strobes. It is packaged in an 84-ball VFBGA measuring 8x12.5 mm with a thickness of 1.0 mm.

Memory IC Feature Summary

• Supports double data rate architecture enabling two data transfers per clock cycle.
• Features programmable additive CAS latency and configurable burst lengths of 4 or 8.
• Includes off-chip driver impedance adjustment and on-die termination for signal integrity.
• Provides write data mask capability and auto-precharge operations for read/write bursts.

Memory IC Applications

• Embedded systems requiring high-speed volatile memory
• Communication equipment utilizing synchronous data buses
• Consumer electronics devices with moderate bandwidth requirements

Memory IC Procurement Notes

Verify the specific speed grade suffix against the required timing specifications before procurement. Confirm that the operating temperature range aligns with the intended application environment, noting that industrial grades offer extended thermal capabilities. Ensure compatibility with the system's power supply ramp sequence and initialization commands to prevent undefined operation states.

Memory IC Selection Notes

Select this component when a 16-bit data bus width and 1 Gbit capacity are required within a compact surface-mount package. Consider the -25 suffix for applications targeting DDR2-800 performance levels. Evaluate the need for industrial temperature variants if the deployment environment exceeds standard commercial limits. Verify that the host controller supports the necessary mode register programming sequences.

Memory IC Part Context

This part belongs to the Winbond W971GG6NB family of DDR2 SDRAMs. The family includes various speed grades such as -18, -25, and -3, each optimized for different clock frequencies. Industrial variants like 25I and 25J provide extended temperature ranges compared to the standard commercial version. All members share the same 84-ball VFBGA footprint and core architectural features.

Memory IC Replacement Considerations

Direct substitutes include other W971GG6NB variants with different speed grades or temperature ratings. Cross-manufacturer replacements require careful verification of pinout compatibility, voltage levels, and timing parameters to ensure functional equivalence without hardware modifications.