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BR24S256-W Datasheet(PDF) 4 Page - Rohm

Part # BR24S256-W
Description  High Reliability Series EEPROMs I2C BUS
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BR24S256-W Datasheet(HTML) 4 Page - Rohm

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Technical Note
4/40
www.rohm.com
2009.09 - Rev.D
© 2009 ROHM Co., Ltd. All rights reserved.
BR24L□□-W Series,BR24S□□□-W Series
●Action timing characteristics (Unless otherwise specified, Ta=-40~+85℃, VCC=1.8~5.5V)
*1
Parameter
Symbol
FAST-MODE
2.5V≦Vcc≦5.5V
STANDARD-MODE
1.8V≦Vcc≦5.5V
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
SCL frequency
fSCL
-
-
400
-
-
100
kHz
Data clock “HIGH“ time
tHIGH
0.6
-
-
4.0
-
-
μs
Data clock “LOW“ time
tLOW
1.2
-
-
4.7
-
-
μs
SDA, SCL rise time
*2
tR
-
-
0.3
-
-
1.0
μs
SDA, SCL fall time
*2
tF
-
-
0.3
-
-
0.3
μs
Start condition hold time
tHD:STA
0.6
-
-
4.0
-
-
μs
Start condition setup time
tSU:STA
0.6
-
-
4.7
-
-
μs
Input data hold time
tHD:DAT
0
-
-
0
-
-
ns
Input data setup time
tSU:DAT
100
-
-
250
-
-
ns
Output data delay time
tPD
0.1
-
0.9
0.2
-
3.5
μs
Output data hold time
tDH
0.1
-
-
0.2
-
-
μs
Stop condition setup time
tSU:STO
0.6
-
-
4.7
-
-
μs
Bus release time before transfer start
tBUF
1.2
-
-
4.7
-
-
μs
Internal write cycle time
tWR
-
-
5
-
-
5
ms
Noise removal valid period (SDA, SCL terminal)
tI
-
-
0.1
-
-
0.1
μs
WP hold time
tHD:WP
0
-
-
0
-
-
ns
WP setup time
tSU:WP
0.1
-
-
0.1
-
-
μs
WP valid time
tHIGH:W
P
1.0
-
--
1.0
-
-
μs
*1 BR24L02/16/32-W : 1.7~5.5V
*2 Not 100% tested
●FAST-MODE and STANDARD-MODE
FAST-MODE and STANDARD-MODE are of same actions, and mode is changed. They are distinguished by action speeds.
100kHz action is called STANDARD-MODE, and 400kHz action is called FAST-MODE. This action frequency is the
maximum action frequency, so 100kHz clock may be used in FAST-MODE. When power source voltage goes down, action
at high speed is not carried out, therefore, at Vcc=2.5V~5.5V , 400kHz, namely, action is made in FASTMODE. (Action is
made also in STANDARD-MODE) Vcc=1.8V~2.5V is only action in 100kHz STANDARD-MODE.


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