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參數(shù)資料
| 型號(hào)： | BU9877FV |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | Serial interface IC for DIMMs supporting plug & play |
| 中文描述： | 對(duì)DIMM的串行接口芯片，支持即插即用 |
| 文件頁(yè)數(shù)： | 2/9頁(yè) |
| 文件大小： | 95K |
| 代理商： | BU9877FV |
2
Memory ICs
BU9877FV
Block diagram
1
2
3
4
8
Vcc
A0
A1
A2
GND
WP
SCL
SDA
7
6
5
2048bit EEPROM Array
8bit
8bit
8bit
Address
Decoder
Slave · word
Address Register
Data
Register
START
STOP
Control Circuit
Write Protect Control Circuit
ACK
High voltage generator
Power supply voltage detector
Pin descriptions
Pin No.
Note: The SDA pin is Nch open drain output, and should be used with external pull-up resistor.
The WP pin is equipped with internal pull-down resistor, so can be left open when used.
Slave address setting (pin)
Input / output reference voltage of 0V
Slave and word address, serial data input / output
Serial clock input
Write protect input
Connect the power supply to this.
Pin name
Function
I / O
A0, A1, A2
1, 2, 3
I
GND
4
—
SDA
5
I / O
SCL
6
I
WP
7
I
V
CC
8
—
Electrical characteristics (unless otherwise noted, Ta = – 40 to + 85°C, Vcc = 2.7V to 5.5V)
Parameter
Symbol
Min.
Typ.
V
IH
Input high level voltage
—
V
V
IL
Input low level voltage
0.3V
CC
V
V
OL
Output low level voltage
I
OL
= 3.0mA (SDA)
Fig.1
0.4
V
I
LI1
Input leakage current 1
V
IN
= 0V ~ V
CC
Fig.2
1
μ
A
I
LI2
Input leakage current 2
V
IN
= 0V ~ V
CC
(WP)
Fig.2
20
μ
A
I
LO
Output leakage current
V
OUT
= 0V ~ V
CC
Fig.2
1
μ
A
I
CC
Operating current
consumption
V
CC
= 5.5V, f
SCL
= 100kHz
Fig.3
3.0
mA
I
SB
Standby current
V
CC
= 5.5V, SDA · SCL = V
CC
Fig.4
2.0
μ
A
f
SCL
SCL frequency
100
kHz
Measurement circuit
0.7V
CC
—
—
– 1
– 1
– 1
—
—
—
—
—
—
—
—
—
—
—
—
Max.
Unit
Conditions
—
—
—
—
—
—
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