参数资料
| 型号： | BR24C21F-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 9/21页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 1KBIT 400KHZ 8SOP |
| 标准包装： | 2,500 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 1K (128 x 8) |
| 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： | 8-SOIC（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-SOP |
| 包装： | 带卷 (TR) |
BR24C21xxx Series (1K)
Datasheet
● Command Cancellation By Start And Stop Condition
During a command input, command is canceled by the successive inputs of start condition and stop condition (Figure 15.).
However, during ACK or data output, the device may output the SDA line Low. In such cases, operation of start and stop
condition is impossible, making the reset inoperable. Execute the software reset in the cases. (Figure 13.)
Operating the command cancel by start and stop condition during the command of Random Read or Sequential Read or
Current Read, internal address counter is not confirmed. Therefore operation of Current Read after this is not valid. Operate
a Random Read in this case.
SCL
SDA
1
0
1
0
Start
Condition
Stop
Condition
Figure 15. Command Cancellation
● I/O Circuit
○ SDA Pin Pull-up Resister
The pull up resister is needed because SDA is NMOS open drain. Choose the correct value of this resister(R PU ), by
considering VIL, IL characteristics of a controller which control the device and VOH, IOL characteristics of the device. If
large R PU is chosen, clock frequency needs to be slow. In case of small R PU , the operating current increases.
○ Maximum Rpu
Maximum value of R PU is determined by following factors:
① SDA rise time determined by R PU and the capacitance of bus line(CBUS) must be less than tR.
1) Other timing must keep the conditions of AC spec.
② When SDA bus is High, the voltage A of SDA bus determined by a total input leak(IL) of the all devices connected to
the bus. R PU must be significantly higher than the High level input of a controller and the device, including a noise
margin 0.2V CC .
V CC -ILR PU -0.2 V CC ≧ VIH
MICRO
∴
R PU
≦
0.8Vcc-V IH
IL
COMPUTER
R PU
A
SDA PIN
Examples: When V CC =3V IL=10μA VIH=0.7V CC
According to ②
IL
IL
R PU
≦
0.8x3-0.7x3
10x10 -6
≦
300 [k ? ]
THE CAPACITANCE OF
BUS LINE (CBUS)
Figure 16. I/O Circuits
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
9/18
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 |
|---|---|
| BR24C21FJ | 制造商:ROHM 制造商全称:Rohm 功能描述:ID ROM for CRT display |
| BR24C21FJ-E2 | 功能描述:IC EEPROM EDID 1K 100KHZ 8-SOP RoHS:是 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:1 系列:- 格式 - 存储器:EEPROMs - 串行 存储器类型:EEPROM 存储容量:16K (1K x 16) 速度:2MHz 接口:Microwire 3 线串行 电源电压:1.8 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOP-J 包装:Digi-Reel® 产品目录页面:1380 (CN2011-ZH PDF) 其它名称:BR93L86FJ-WE2DKR |
| BR24C21FV | 制造商:ROHM 制造商全称:Rohm 功能描述:EDID Memory (For display) |
| BR24C21FV-E2 | 功能描述:电可擦除可编程只读存储器 I2C 1K BIT 128 X 8 3.3V/5V 8PIN 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 |
| BR24C32 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM |
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