DS90UB948-Q1: DS90UB948-Q1: Deserializer

Pradeep Prabhu G

Part Number: DS90UB948-Q1

We are interfacing #4 I2C based interfaces to deserializer chip (backlight, touch, EEPROM and NFC). For I2C bus load capacitance calculation we are not able get details in deserializer datasheet. Can you please provide I2C bus load capacitance of deserializer chip.

over 6 years ago

0 Steven(Shenzhen) Shi over 6 years ago

TI__Mastermind 30515 points

Hello,
pls check datasheet page14 on capacitive load for each I2C bus line, which has cap. maximum request.

Cb Capacitive Load for Each Bus
Line
Standard Mode 400 pF
Fast Mode 400 pF
Fast Plus Mode 550 pF

regards, Steven

0 Pradeep Prabhu G over 6 years ago in reply to Steven(Shenzhen) Shi

Intellectual 560 points

As per the attached datasheet screenshot image, fast plus mode showing 200pF but your reply mentioned 550pf. Please clarify

0 Steven(Shenzhen) Shi over 6 years ago in reply to Pradeep Prabhu G

TI__Mastermind 30515 points

Yes, you are right to get the answer.
regarding the 550ps vs200pf, it is typo in old d/s, and I just copy it. you can use the new in your message. it is true that the cap. load is small for fast data rate.

regards,
Steven

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DS90UB948-Q1: DS90UB948-Q1: Deserializer