# W66CP6RBQAGJ In Stock — Domestic Replacement HGD4F04S42 PIN2PIN No-Redesign | HGCHIPS

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# W66CP6RBQAGJ in stock — HGD4F04S42 domestic drop-in replacement (PIN2PIN, no redesign)

**HGD4F04S42** is a pin-to-pin compatible replacement for **Winbond W66CP6RBQAGJ**, matching the original on density (4 Gbit) and low-power LPDDR4X mobile memory in a 200-ball package. Confirm the x16/x32 bus width and ball map before switching. Samples start at 10 pcs.

Specification comparison

## W66CP6RBQAGJ vs HGD4F04S42 — what has to match

| Parameter | Winbond W66CP6RBQAGJ (original) | HGD4F04S42 (HGCHIPS) | Match |
| --- | --- | --- | --- |
| Density (Gbit) | 4 | 4 | ✔ Same |
| Organization | x16 (confirm) | x16 | ✔ Same |
| Speed Grade | LPDDR4X-3733 (1.866 GHz) | LPDDR4-4266 | ✔ Same (speed class) |
| Voltage (V) | 1.8/1.1/0.6 | 1.8/1.1/1.1 | ◐ Confirm (VDDQ) |
| Package | 200-ball TFBGA | VFBGA-200 | ◐ Confirm (ball map) |
| Temperature Grade | Commercial (0~+95C) | Commercial (0~+95C) | ✔ Same |

W66CP6RBQAGJ is a 4 Gbit LPDDR4X part with a Winbond-specific ball map; final pin-out is confirmed against the datasheet before release. A 4 Gbit x32 alternative is also available on request.

FAQ

## W66CP6RBQAGJ alternative — common questions

### Is HGD4F04S42 a direct replacement for Winbond W66CP6RBQAGJ?

Yes. HGD4F04S42 is engineered as a pin-to-pin compatible replacement for Winbond W66CP6RBQAGJ. 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 HGD4F04S42?

No PCB or firmware change is intended. The part is designed for the same footprint and ball map as Winbond W66CP6RBQAGJ. 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 HGD4F04S42 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 HGD4F04S42 specification](https://hgchips.net/parts/hgd4f04s42.html)

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Last updated: 2026-10-12