BR24T128NUX Datasheet, PDF (4/24 Pages) Rohm – High Reliability Serial EEPROMs

BR24T□□□□Series
Technical Note
●Block diagram
*2
A0 1
*2 _{A1 2}
1Kbit～1024Kbit EEPROM array
*1
8bit
Address
decoder
*17bit 13bit
8bit 14bit
9bit 15bit
10bit 16bit
11bit 17bit
12bit
Word
address register
Data
register
*2 _{A2 3}
GND 4
START
Control circuit
STOP
High voltage
generating circuit
Power source
voltage detection
ACK
8 Vcc
7 WP
6 SCL
5 SDA
A0
1
A1
2
A2
3
GND ⁴
BR24T01-W
BR24T02-W
BR24T04-W
BR24T08-W
BR24T16-W
BR24T32-W
BR24T64-W
BR24T128-W
BR24T256-W
BR24T512-W
BR24T1M-W
8 Vcc
7 WP
6 SCL
5 SDA
*_{1 7bit: BR24T01-W 12bit: BR24T32-W}
8bit: BR24T02-W 13bit: BR24T64-W
9bit: BR24T04-W 14bit: BR24T128-W
10bit: BR24T08-W 15bit: BR24T256-W
11bit: BR24T16-W 16bit: BR24T512-W
17bit: BR24T1M-W
*2 A0= Don't use : BR24T04-W, BR24T1M-W
A0, A1=Don't use: BR24T08-W
A0, A1, A2=Don't use: BR24T16-W
Fig.2 Block diagram
●Pin assignment and description
Terminal Input/
Name Output ^BR24T01-W
BR24T02-W
BR24T04-W
A0
Input Slave address setting
A1
Input
Slave address setting
BR24T08-W BR24T16-W
Don’t use*
Don’t use*
BR24T32/64/
128/256/512-W
BR24T1M-W
Slave address
setting
Don’t use*
Slave address setting
A2
Input
Slave address setting
Don’t use*
Slave address setting
GND
SDA
SCL
－
Input/
output
Input
Reference voltage of all input / output, 0V
Serial data input serial data output
Serial clock input
WP
Input
Write protect terminal
Vcc
－
Connect the power source.
*Pins not used as device address may be set to any of ‘H’, 'L', and 'Hi-Z'.
●Characteristic data (The following values are Typ. ones.)
6
5
Ta=-40℃
Ta=25℃
4 Ta=85℃
3
SPEC
2
1
0
0
1
2
3
4
5
6
SUPPLY VOLTAGE : Vcc(V)
Fig.3　'H' input voltage V_IH1
(A0,A1,A2,SCL,SDA,WP)
1
0.8 ^Ta=-40℃
Ta=25℃
Ta=85℃
0.6
0.4
SPEC
0.2
0
0
1
2
3
4
5
6
L OUTPUT CURRENT : I_OL(mA)
Fig.6　'L' output voltage V_OL2-I_OL(Vcc=2.5V)
6
5
Ta=-40℃
Ta=25℃
4
Ta=85℃
3
2
1
0
0
1.2
1
SPEC
1
2
3
4
5
6
SUPPLY VOLTAGE : Vcc(V)
Fig.4　'L' input voltage V_IL1
(A0,A1,A2,SCL,SDA,WP)
SPEC
0.8
0.6
Ta=-40℃
0.4
Ta=25℃
Ta=85℃
0.2
0
0
1
2
3
4
5
6
SUPPLYVOLTAGE : Vcc(V)
Fig.7　Input leak current I_LI
(A0,A1,A2,SCL,WP)
1
Ta=-40℃
0.8 Ta=25℃
Ta=85℃
0.6
0.4 SPEC
0.2
0
0
1
2
3
4
5
6
L OUTPUT CURRENT : I_OL(mA)
Fig.5 'L' output voltage V_OL1-I_OL(Vcc=1.7V)
1.2
SPEC
1
0.8
0.6
Ta=-40℃
0.4
Ta=25℃
Ta=85℃
0.2
0
0
1
2
3
4
5
6
SUPPLY VOLTAGE : Vcc(V)
Fig.8　Output leak current I_LO(SDA)
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2011.03 - Rev.A