BU9844GUL-W_10 Datasheet, PDF (4/19 Pages) Rohm – WL-CSP EEPROM family I2C BUS

BU9844GUL-W
●Block diagram
VCC
GND
A2
9bit
Address
decoder
16Kbit EEPROM array
Slave – word
9bit
address register
8bit
Data
register
START
STOP
Control circuit
ACK
High voltage
generating circuti
Power source
voltage detection
Technical Note
WP
SCL
SDA
●Pin assignment and description
Fig.2 Block diagram
○ ○ ^C
C1
C2
○ ○ ^B
B1
B2
○ ○ ^A
A1
A2
12
Fig.3 BU9844GUL-W(bottom view)
INDEX post
Land No. Terminal name Input/ Output
Function
A1
VCC
－
Power Supply
A2
A2
Input
Out of Use (Vcc or GND or OPEN)
B1
WP
Input
Write Protect Input
B2
GND
Input
Ground （0V）
C1
SCL
Input
Serial Clock Input
C2
SDA
Input /Output
Slave and Word Address,
Serial Data Input, Serial Data Output
*1
*1 An open drain output requires a pull-up resistor.
●Characteristic data (The following values are Typ. ones.)
6
6
5
5
4
SPEC
3
2
Ta=85℃
1
Ta=-40℃
Ta=25℃
0
0
1
2
3
4
5
6
Vcc[V]
Fig.4 H input voltage VIH1,2,3
(A2,SCL,SDA,WP)
4
3
Ta=85℃
Ta=-40℃
2
Ta=25℃
1
SPEC
0
0
1
2
3
4
5
6
Vcc[V]
Fig.5 L input voltage VIL1,2,3
(A2,SCL,SDA,WP)
1
0.8
0.6
0.4
Ta=25℃
Ta=85℃
SPEC
0.2
Ta=-40℃
0
0
1
2
3
4
5
6
IOL2[mA]
Fig.6 L output voltage VOL2-IOL2
(VCC=1.7V)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
4/18
2010.09 - Rev.A