Sony Headphone internal codes and Bluetooth SoCs

Sony WF-1000X BT

In a previous article I outlined many of the current and past Walkman model internal codes Sony uses.  While the Walkman models use ICX for their prefix, the headphones use HDX. I will try to keep this updated with the latest information but it is not always possible to find the code, the Bluetooth chip or both.

Sony WH-CH510

Most of the information is from FCC documents, Bluetooth certifications, Apple Certifications, Country specific certifications, and from teardowns. Not all of the data in the table is complete and there will be gaps.

Here are the links to the Bluetooth SoCs Sony has used for the past few years in their headphones. I had to remove some of the links for the SoCs as they stopped working. Some information can be found in my Sony V2 post for the Mediatek SoCs. I have some of the Aichip product page descriptions saved, so I can write them up on here if people want me to.

• Qualcomm CSR8675
• Qualcomm CSR8670 
• Airoha AB1522
• Airoha AB1531
• Airoha AB1552
  
• Airoha AB1561M
  
• Airoha AB1562M
• Airoha AB1562A
  
• Airoha AB1563E
  
• Realtek RTL8763B
• Mediatek MT2811
• Mediatek MT2822
• Mediatek MT2833 
• NXP NXH3670
• Sony CXD3277
  

Even Sony has switched to the YY naming scheme on all certification sites, I suspect Sony still uses the HDX-#### scheme internally for development, as seen with the WF-C500 teardown. Perhaps not on the PCBs, but in internal documents.

 

Here is the latest table (10-10-2024). Grey out models are unknown or might not even exist. Please keep in the mind that these codes are not just for wireless headphones, but also for wired, and their accessories like cables.

Model	Code	Bluetooth SoC
	YY2985
??	YY2984	??
MDR-M1	YY2983	not wireless
WF-C510	YY2982	AB1563E
WH-ULT900N	YY2981	MT2822M
USB Transceiver (YY2977)	YY2980	??
USB Transceiver (YY2976)	YY2979	??
WI-EO600	YY2978	RTL8763BFS
WF-G700	YY2977	CXD3277
WH-G500	YY2976	MT2822M
LinkBuds Fit	YY2975	MT2833
USB Transceiver (YY296)	YY2974	??
	YY2973
MUC-M12SB2	YY2972	none
MUC-B20SB2	YY2971	none
MDR-MV1	YY2970	not wireless
LinkBuds UC	YY2969	MT2822M
WF-C700N	YY2968	AB1562AE
	YY2967
WH-CH720N	YY2966	MT2822M
USB transciever (H7/H9)	YY2965	NXH3670UK
LinkBuds Open	YY2964	MT2833
WF-1000XM5	YY2963	MT2833
WI-EO600	YY2962	RTL8763B
MDR-G300	YY2961	not wireless
WH-G700	YY2960	MT2811B/NXH3670UK
WH-G900N	YY2959	MT2811B/NXH3670UK
WH-CH520	YY2958	AB1561M
WI-C100	HDX-2957	AB1561M
	YY2956
	YY2955
WH-1000XM5	YY2954	MT2822A
WF-L900 (LinkBuds)	HDX-2953	MT2822M
WF-C500	HDX-2952	AB1562M
WH-XB910N	HDX-2951	MT2822S
WF-LS900N	YY2950	MT2822M
	YY2949
WF-1000XM4	HDX-2948	MT2822S
WH-CH710N	HDX-2947	AB1531
WF-SP800N	??	RTL8763B
WI-SP510	HDX-2945	MT2811SP
WF-XB700	HDX-2944	AB1552
WH-1000XM4	HDX-2943	MT2811A
WF-H800	??	MT2811A
WH-H810	HDX-2941	MT2811
WH-H910N	HDX-2940	MT2811SP
WI-XB400	HDX-2937	RTL8763B
WH-CH510	HDX-2936	RTL8763B
WI-C310	HDX-2934	RTL8763B
WI-C200	HDX-2933	RTL8763B
WF-1000XM3	HDX-2931	MT2811
WH-XB700	HDX-2930	CSR8675
WI-1000XM2	HDX-2928	MT2811SP
WH-XB900N	??	CSR8675
WH-CH500	HDX-2918	AB1522
WH-1000XM3	HDX-2916	CSR8675
WI-C300	HDX-2914	AB1522
WF-SP700N	HDX-2911	CSR8675
WH-CH400	HDX-2910	AB1522
WH-CH700N	HDX-2908	CSR8675
WH-H900N	HDX-2893	CSR8675
WH-1000XM2	HDX-2892	CSR8675
WI-C400	HDX-2888	AB1522
WH-H800	HDX-2887	CSR8675
WF-1000X	HDX-2865	CSR8675
WI-SP600N	??	CSR8675
MDR-XB950N1	HDX-2854	CSR8675
WI-1000X	HDX-2853	CSR8675
MDR-ZX220BT	HDX-2852	CSR8675
MDR-XB70BT	HDX-2842	CSR8675
MDR-XB50BS	HDX-2840	CSR8675
MDR-XB80BS	HDX-2838	CSR8675
MDR-1000X	HDX-2837	CSR8675
MDR-XB650BT	HDX-2834	CSR8670
MDR-100ABN	HDX-2833	CSR8670
MDR-EX750BT	HDX-2821	CSR8675
MDR-1ABT	HDX-2819	CSR8670
MDR-ZX330BT	HDX-2795	CSR8670
MDR-ZX770BN	HDX-2793	CSR8670
MDR-ZX550BN	HDX-2783	CSR8670
MDR-ZX780DC	HDX-2863	unknown
MDR-XB950BT	HDX-2755	CSR8670
??	HDX-2734	unknown
MDR-10RBT	HDX-2587	unknown
MDR-RF6500	HDX-2516	unknown
MDR‐AS600BT	??	CSR8670
MDR-AS800BT	??	CSR8670
MDR-1RBT	??	CSR8670
DR-BTN200	??	CSR8670