# W631GU6MB In Stock โ€” Domestic Replacement HGD31L16C16 PIN2PIN No-Redesign | HGCHIPS ๐Ÿ“ Zhongshan HQ ยท Memory & Power Import Substitution ยท Taiwan Engineering ยท US Sales Support ๐Ÿ“ง sales@hgchips.net | โ˜Ž +86 760 8992 4799 | ๐Ÿ’ฌ WhatsApp +852 9298 5589 / +852 9298 5590 Home / Part Numbers / W631GU6MB alternative # W631GU6MB in stock โ€” HGD31L16C16 domestic drop-in replacement (PIN2PIN, no redesign) **HGD31L16C16** is a pin-to-pin compatible replacement for **Winbond W631GU6MB**. It matches the original on density (1 Gbit), organization (64Mx16), voltage (1.35 V DDR3L) and package (96-ball VFBGA), so no PCB or firmware change is required. Samples start at 10 pcs with lot-level test reports. Specification comparison ## W631GU6MB vs HGD31L16C16 โ€” what has to match | Parameter | Winbond W631GU6MB (original) | HGD31L16C16 (HGCHIPS) | Match | | --- | --- | --- | --- | | Density (Gbit) | 1 | 1 | โœ” Same | | Organization | 64Mx16 | 64Mx16 | โœ” Same | | Speed Grade | DDR3-1866 (max) | DDR3-1600 | โœ” Same (1600 grade; 1866 on request) | | Voltage (V) | 1.35 | 1.35 | โœ” Same | | Package | 96-ball VFBGA | VFBGA-96 | โœ” Same | | Temperature Grade | Commercial (0~+95C) | Commercial (0~+95C) | โœ” Same | W631GU6MB is offered in DDR3L-1333/1600/1866 speed grades; HGD31L16C16 covers the 1600 grade directly, and the 1866 grade is confirmed on request. Always qualify on your platform before volume use. FAQ ## W631GU6MB alternative โ€” common questions ### Is HGD31L16C16 a direct replacement for Winbond W631GU6MB? Yes. HGD31L16C16 is engineered as a pin-to-pin compatible replacement for Winbond W631GU6MB. Ball map, electrical specification and timing are compared against the original manufacturer's public datasheet, and the part is functionally validated before shipment. ### Do I need to change my PCB or firmware for HGD31L16C16? No PCB or firmware change is intended. The part is designed for the same footprint and ball map as Winbond W631GU6MB. Always qualify the replacement on your own board before volume use โ€” we provide samples from 10 pcs and lot-level test reports for that purpose. ### What is the minimum order quantity? Samples start at 10 pcs. Sample cost is credited against your first production order. ### What lead time should I expect? Stock lines ship within 48 hours from Shenzhen. Non-stock and long-lifecycle programs are quoted with a confirmed lead time โ€” send your target quantity and we reply within 24 business hours. ### How is compatibility verified? Our Taiwan engineering team compares density, organization, speed grade, voltage, package and temperature grade against the original datasheet, then the part is functionally validated on mainstream platforms, with traceable per-lot records. ## Request HGD31L16C16 samples or a quote Send your target quantity and platform โ€” we confirm compatibility, share test reports and quote within 24 business hours. Request a Quote ยท [Full HGD31L16C16 specification](https://hgchips.net/parts/hgd31l16c16.html) --- Source: https://hgchips.net/alternatives/w631gu6mb.html Last updated: 2026-10-12