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BR24A Datasheet(PDF) 15 Page - Rohm

Part No. BR24A
Description  High Reliability Series EEPROMs I2C BUS
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Maker  ROHM [Rohm]
Homepage  http://www.rohm.com
Logo ROHM - Rohm

BR24A Datasheet(HTML) 15 Page - Rohm

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BR24A□□-WM series
Technical Note
2009.08 - Rev.C
© 2009 ROHM Co., Ltd. All rights reserved.
2C BUS input / output circuit
Input (A0,A2,SCL)
Input / output (SDA)
Input (A1, WP)
Notes on power ON
At power on, in IC internal circuit and set, VCC rises through unstable low voltage area, and IC inside is not completely reset,
and malfunction may occur. To prevent this, functions of POR circuit and LVCC circuit are equipped. To assure the action,
observe the following conditions at power on.
1. Set SDA = 'H' and SCL ='L' or 'H'
2. Start power source so as to satisfy the recommended conditions of tR, tOFF, and Vbot for operating POR circuit.
Recommended conditions of tR, tOFF,Vbot
10ms or below
10ms or longer
0.3V or below
100ms or below
10ms or longer
0.2V or below
Fig.56 Input pin circuit diagram
Fig.57 Input / output pin circuit diagram
Fig.58 Input pin circuit diagram
Fig.59 Rise waveform diagram

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