# W66CP2NQ In Stock — Domestic Replacement HGD4M04S21 PIN2PIN No-Redesign | HGCHIPS

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# W66CP2NQ in stock — HGD4M04S21 domestic drop-in replacement (PIN2PIN, no redesign)

**HGD4M04S21** is a pin-to-pin compatible replacement for **Winbond W66CP2NQ**, matching the original on low-power LPDDR4 mobile memory in the 4 Gbit density. Confirm the bus width and ball map before switching. Samples start at 10 pcs.

Specification comparison

## W66CP2NQ vs HGD4M04S21 — what has to match

| Parameter | Winbond W66CP2NQ (original) | HGD4M04S21 (HGCHIPS) | Match |
| --- | --- | --- | --- |
| Density (Gbit) | 2 / 4 | 4 | ◐ Confirm (density bin) |
| Organization | x16 (confirm) | x16 | ✔ Same |
| Speed Grade | LPDDR4 (SDP) | LPDDR4-2133 | ✔ Same (speed class) |
| Voltage (V) | 1.8/1.1/1.1 | 1.8/1.1/1.1 | ✔ Same |
| Package | TFBGA (confirm) | VFBGA-200 | ◐ Confirm (ball map) |
| Temperature Grade | Commercial (0~+95C) | Commercial (0~+95C) | ✔ Same |

W66CP2NQ is a low-density LPDDR4 part offered in 2 Gb / 4 Gb bins; HGD4M04S21 covers the 4 Gbit x16 bin. Confirm the exact density and ball map before design-in.

FAQ

## W66CP2NQ alternative — common questions

### Is HGD4M04S21 a direct replacement for Winbond W66CP2NQ?

Yes. HGD4M04S21 is engineered as a pin-to-pin compatible replacement for Winbond W66CP2NQ. 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 HGD4M04S21?

No PCB or firmware change is intended. The part is designed for the same footprint and ball map as Winbond W66CP2NQ. Always qualify the replacement on your own board before volume use — 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 — 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 HGD4M04S21 samples or a quote

Send your target quantity and platform — we confirm compatibility, share test reports and quote within 24 business hours.

Request a Quote · [Full HGD4M04S21 specification](https://hgchips.net/parts/hgd4m04s21.html)

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Last updated: 2026-10-12