What is this component (L343)? and NAND ID = 89A825CBA9
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Author:  jeremyb [ September 16th, 2018, 11:41 ]
Post subject:  What is this component (L343)? and NAND ID = 89A825CBA9

I got an unusual PNY 128GB flash drive today, it has a component I've never seen before, a chip labeled.


The package dimensions are 6x2

None of the components have failed, I recognize the LDO right away, I'm not looking to do down that path, just identify this component.

The controller is IS903.
Also the NAND chip is interesting
NAND Reader ID: 8 x 89 88 24 4b (8GB) = 64GB
Controller ID: 4 x 89 A8 25 CB (16GB) = 64GB

I've seen SanDisk/Toshiba switch manufacture IDs (45/98) when IDing but NEVER an entire model/bank count.
By see, I mean with a logic analyzer, first ID = 45, second ID = 98.

Flash ID code:      89A825CB - Intel JS29F64B08HAMF1 - 4CE/Dual Channel [MLC-8K] -> Total Capacity = 128GB

Flash ID mapping table
[Channel 0]   [Channel 1]
89A825CBA900   89A825CBA900
89A825CBA900   89A825CBA900
89A825CBA900   89A825CBA900
89A825CBA900   89A825CBA900

Before thinking the controller ID code is erroneous, why would it return a valid NAND chip ID, much less one of the proper capacity?

_DSC9189.jpg [ 535.47 KiB | Viewed 2003 times ]

Author:  fzabkar [ September 16th, 2018, 16:29 ]
Post subject:  Re: What is this component (L343)? and NAND ID = 89A825CBA9

The IS903 requires 1.2V (Vcore) and 3.3V (Vio) supplies. The "QVN" LDO regulator provides the 1.2V, so where is the 3.3V?

BTW, "343" could be a YWW date code, ie week 43 of 2013.

TLV70212DBVR, Texas Instruments, 1.2V, 300mA, Low IQ, LDO Regulator, marking QVN, SOT-23-5:

IS903, Innostor, USB 3.0 flash controller, Vcore = 1.2V, Vio = 3.3V, 30MHz:

Author:  fzabkar [ September 16th, 2018, 18:11 ]
Post subject:  Re: What is this component (L343)? and NAND ID = 89A825CBA9

AFAICT, the "AGDE" component must be a 3.3V regulator, although I would have expected to see an inductor nearby (or on the underside of the PCB?). FWIW, other designs use an EML3020 switchmode IC (TDFN-6 package).


Author:  HaQue [ September 16th, 2018, 22:43 ]
Post subject:  Re: What is this component (L343)? and NAND ID = 89A825CBA9

maybe they doing some funky stuff and "striping" channel 0 and channel 1 onto the same phy bank, and this is what NR is seeing (with some controller overlay or translation to lie about the ID. whereas the LA is seeing reality.

I am not 100% following whats going on either, definately a new way for PNY to be weirdo's

Author:  fzabkar [ September 17th, 2018, 2:15 ]
Post subject:  Re: What is this component (L343)? and NAND ID = 89A825CBA9

Does this help (from Innostor's datasheet)?

IS903_CEs_8.gif [ 28.7 KiB | Viewed 1933 times ]
IS903_CEs_4.gif [ 32.29 KiB | Viewed 1933 times ]

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