Non Volatile RAM (F-RAM & NVSRAM) Forum Discussions

Good day.

Some time ago, batch of CY14B101PA-SFXI and CY2308SXI-2 was purchased from one of the distributors. Visual and functional tests have shown compliance with the declared characteristics. But inside the case, the x-ray revealed differences. The supplier advised that this is normal and that the differences depend on the location of factory. The most interesting thing is that these positions were purchased from this supplier for a long time and there were no refusals or significant claims for him. This is fake or not? I would like to be sure if this is normal and what is the reason for these differences?

Would be grateful for your answer. JPG in attachment

FRAM  access time on datasheet only mention.

The access time for the memory operation is essentially zero,

Did you have actual timing for SPEC. define?

Hi all,

I would like to have both data of IBIS and SPARA.

Parts number are below;

MPN: CY15B104Q-PZXI (SPARA)

MPN: FM25V20-PG (IBIS, SPARA)

I found IBIS data of CY15B104Q-PZXI at https://www.cypress.com/documentation/models/cy15b104q-ibis

Please provide lest of SPARA for both parts, IBIS for FM25V20-PG.

BR,

Uehara

Hi,

I am interested in using this parts for logging data from a tool that we are preparing to test in the field, but I am having difficulty getting any response from the commands that I am sending.  I have tried RDID, RDSR, and a WREN-WRITE-READ operation without success.

I have setup the device on a breadboard interfaced to the SPI port of my microcontroller (CS,SCK,SI,SO), and the WP,HOLD pins on the chip are tied to 3.3V.  Power (3.3V) and Ground are also connected on the chip.  Note: I have tried 3 different chips with no success.

Here is a scope shot of my attempt to read the device ID from the chip.

Here is a closeup of the opcode byte for the RDID command.

It appears as if the SO line from the CY15B102Q does not ever come out of its Hi-Z state.

Any input would be welcome,

Thanks

１．power cycle timing

    tVR,tVFのMax規定はありますか。

　　tPDは、VDD(min)以下になるときCS/がHighとなっている規格と思いますが、
　　この規格を違反した場合、次の電源ON時に正常動作ができないことは考えられますか。

2．VDDが2.0v以下でFRAMはPowerOFFと考えています。
　　Power OFFからPower ONにするまでの時間に規定はございますか。
　　（VDDが2.0v以下になってから次にpower ONするまでの時間）

3．入力信号（たとえばSCLK)において、VIHとVIL間の中間電位(0.99V～2.31V)状態で時間の制約はありますか。
　

Hello,

We buy FM25V20A-GTR from the supplier company located in our country. The last Rams we bought are not working.

The codes written on the previous and current Rams are as follows, can you give any information accordingly?

fm25v20a-g b 611058 cyp1843

fm25v20a-g d 605877 cyp1907

Is there a difference in these two rams? if so, what is the change? What should be done to run these rams?

Thanks in advance for your answer,

Mehmet Akif.