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参数资料
| 型号： | BU9882FV-WE2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 10/21页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 2KBIT 400KHZ 14SSOP |
| 标准包装： | 2,500 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 2K（128 x 8 x 2） |
| 速度： | 400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 14-LSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-SSOP |
| 包装： | 带卷 (TR) |
BR24C21xxx Series (1K)
○ Minimum R PU
The minimum value of R PU is determined by following factors:
① Meets the condition that V OLMAX =0.4V, I OLMAX =3mA when the output is Low.
Datasheet
V CC -V OL
R PU
≦ I OL
∴
R PU ≧
V CC -V OL
I OL
② V OLMAX =0.4V must be lower than the input Low level of the microcontroller and the EEPROM
including the recommended noise margin of 0.1V CC .
VOLMAX ≦ VIL-0.1 V CC
Examples: V CC =3V, VOL=0.4V, IOL=3mA, the VIL of the controller and
According to ①
エラー ! 編集中のフィールド コードからは、オブジェクトを作成できません。
the EEPROM is VIL=0.3V CC ,
and
VOL=0.4 ［ V ］
VIL=0.3 × 3
=0.9 ［ V ］
so that condition ② is met
○ SCL Pin Pull-up Resister
When SCL is controlled by the CMOS output the pull-up resistor at SCL is not required.
However, should SCL be set to Hi-Z, connection of a pull-up resistor between SCL and V CC is recommended.
Several k ? are recommended for the pull-up resistor in order to drive the output port of the microcontroller.
● Notes For Power Supply
V CC rises through the low voltage region in which the internal circuit of the IC and the controller are unstable. Therefore, the
device may not work properly due to an incomplete reset of the internal circuit. To prevent this, the device has a P.O.R. and
LV CC feature. At power up, maintain the following conditions to ensure functions of P.O.R and LV CC .
1. "SDA='H'" and "SCL='L' or 'H'".
2. Follow the recommended conditions of t R , t OFF , Vbot for the P.O.R. function during power up.
エラー ! 編集中のフィールド コードからは、オブジェクトを作成できません。
3. Prevent SDA and SCL from being "Hi-Z".
Recommended conditions of tR, tOFF, Vbot
In case conditions 1 and/or 2 cannot be met, take following
actions:
A)If unable to keep condition 1 ( SDA is "Low" during power
up):
tR
Below 10ms
Below 100ms
tOFF
Above 10ms
Above 10ms
Vbot
Below 0.3V
Below 0.2V
→ Control SDA ,SCL to be "High" as shown in figure below.
! 編集 17.
エラー Figure 中のフィールド コードからは、オブジェクトを作成できません。
B)If unable to keep condition 2.
→ After power becomes stable, execute software reset. (See Figure 13.)
C)If unable to keep both conditions 1 and 2.
→ Follow the instruction A first, then the instruction B.
● LV CC Circuit
LV CC circuit inhibits write operation at low voltage, and prevents an inadvertent write. Write operation is inhibited below the
LV CC voltage (Typ.=1.2V).
● Vcc NOISE Figure 18.
○ Bypass Condenser
Figure 19.
Noise and surges on power line may cause abnormal function. It is recommended that the bypass condensers (0.1μF) are
attached on the Vcc and GND line beside the device. It is also recommended to attach bypass condensers on the board
close to the connector.
● Notes for Use
1) Described numeric values and data are design representative values, and the values are not guaranteed.
2) We believe that application circuit examples are recommendable, however, in actual use, confirm characteristics further
sufficiently. In the case of use by changing the fixed number of external parts, make your decision with sufficient margin in
consideration of static characteristics and transition characteristics and fluctuations of external parts and our LSI.
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
10/18
TSZ02201-0R2R0G100270-1-2
10.Jul.2012 Rev.001
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BU9882F-W | 制造商:ROHM 制造商全称:Rohm 功能描述:EDID Memory (For display) |
| BU9882F-WE2 | 功能描述:电可擦除可编程只读存储器 2K BIT 128 X 8 X 2 3.3V/5V 14PIN RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| BU9882-W | 制造商:ROHM 制造商全称:Rohm 功能描述:EDID Memory (For display) |
| BU9883FV-W | 制造商:ROHM 制造商全称:Rohm 功能描述:I2C BUS 3Ports for HDMI Port Serial EEPROM |
| BU9883FV-W_1 | 制造商:ROHM 制造商全称:Rohm 功能描述:I2C BUS3Ports for HDMI Port Serial EEPROM |
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