HGCHIPS HGD4H04S42 — Drop-in Replacement for H54G56BYYVX046

Sourcing a long-term supply alternative for H54G56BYYVX046 (SK Hynix)? HGCHIPS HGD4H04S42 is a production pin-to-pin compatible part: package and pin-out are cross-checked line by line against the original datasheet, so it drops into your existing PCB and BOM with no circuit change. Suited to second-source qualification, EOL and allocation shortage situations.

HGD4H04S42 Key Specifications

Original Part Numbers Replaced

Typical Applications

• Smartphones and tablets
• Automotive infotainment, T-BOX and ADAS domain controllers
• AI boxes and edge AI devices
• Smart TVs and projectors
• Industrial handhelds and scanners
• Low-power embedded motherboards

Why HGCHIPS HGD4H04S42

• Pin-to-pin compatible — package, pin-out and function cross-checked against the original datasheet; no re-layout, no firmware change.
• Lot test reports — 100% tested before shipment; test data available per lot for IQC records.
• Ships in 48 hours — stock items ship from Shenzhen within 48 hours; long-term projects can be price-locked.
• Samples from 10 pcs — validate in small quantity before volume ramp.

Related Parts and Lookup

Same family: HGD4F04S42 / HGD4F04S42H / HGD4F08X42 / HGD4F16S37 / HGD4F16S37D / HGD4F16S37H / HGD4F16S37M / HGD4F16S37T

LPDDR4 / LPDDR4X drop-in replacement list · Model Finder · Contact: info@hgtech.cc · +86 760 8992 4799

Frequently asked questions

HGD4H04S42 — can it drop in without board changes?

No board changes. HGD4H04S42 is designed as a pin-to-pin drop-in: package and pin-out are checked field by field against the original datasheet, so it fits the existing PCB and firmware. Typical use is second-sourcing, EOL cover and allocation shortages.

How do I use the selection table?

Find your original part number, then check density, organization, speed grade, voltage, package and temperature range against your BOM. Any field that differs is stated on the page — we do not claim the parts are identical.

HGD4H04S42 — samples and lead time?

Samples from 10 pcs, credited against the first order. In-stock items ship from Shenzhen within 48 hours; long-lead projects can be price-locked. Parts are 100% inspected before shipment and batch test data is available for IQC.

How do I request a quote for HGD4H04S42?

Send your target part number, monthly usage and target price to info@hgtech.cc or call +86 760 8992 4799 — we reply within 24 business hours (same day for stock parts).