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参数资料
| 型号： | BU9829GUL-WE2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 17/26页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 16KBIT SPI 9VCSP |
| 标准包装： | 1 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 16K (2K x 8) |
| 速度： | 5MHz |
| 接口： | SPI 串行 |
| 电源电压： | 1.6 V ~ 3.6 V |
| 工作温度： | -30°C ~ 85°C |
| 封装/外壳： | 9-UFBGA，WLCSP |
| 供应商设备封装： | 9-VCSP50L1（1.6x1.6） |
| 包装： | 标准包装 |
| 其它名称： | BU9829GUL-WE2DKR |
BU9829GUL-W (16Kbit)
Datasheet
● EEPROM part
1. Hardware Connection of EEPROM
EEPROM may have malfunction owing to noise signal for input pin, and movement in the low voltage region at power
ON/OFF. These malfunctions may occur, especially at min voltage limit of EEPROM or below.
To avoid this, please note about hardware connection showed as follows.
1.1 Input Terminals
Input equivalent circuits of CSB, SCK and SI are showed Figure 45, 46.
Input terminal is connected between CMOS schmitt trigger input circuit and input protection circuit.
These pin are not pull up or pull down, therefore please don’t input Hi-Z in use. And please make CSB “HIGH” in the
low voltage region at power ON/OFF. If CSB is "LOW" at power ON/OFF, malfunction may occur. To make other input
terminals pull up or pull down is recommendable.
CSB
SCK, SI
ＳＯ
Figure 45. CSB terminals
equivalent circuit
Figure 46. SCK, SI terminals
equivalent circuit
Figure 47. SO terminals
equivalent circuit
1.2 Output Terminals
Output equivalent circuit of so is showed Figure 47. This output terminal is 3 states buffer.
The data is output from so at output timing by READ command, so is Hi-z except this timing. If EEPROM malfunction
occur by Hi-z input of the microcontroller port connected with so, please make so pull up or pull down. If it doesn’t
affected the microcontroller movement to make so open, it is no problem. Load capacity of so disturb high speed
movement of EEPROM. If this load capacity is 100pF or below, BU9829GUL-W can move in 2.5MHz (Vcc1=1.6V to
1.8V) or 5MHz (Vcc1=1.8V to 3.6V)
1.3 Input pin pull up, pull down resistance
The design method of pull up/pull down resistance for input and output are as follows.
1.3.1 Pull up resistance Rpu of input terminals
Rpu
≧
V CC － V OLM
I OLM
…①
V OLM
Microcontroller
I OLM
Rpu
EEPROM
V ILE
V OLM ≦
V ILE
…②
Example) When Vcc=5V, V ILE =1.5V, V OLM =0.4V, I OLM =2mA,
“L” output
“L” input
from the equation ① ,
2×10
Figure 48. Input terminal pull up resistance
Rpu
∴ Rpu
≧
≧
5 － 0.4
-3
2.3[k Ω ]
? V ILE : EEPROM V IL specifications
? V OLM : Microcontroller V OL specifications
? I OLM : Microcontroller I OL specifications
With the value of Rpu to satisfy the above equation, V OLM
becomes 0.4V or below, and with V ILE (=1.5V), the equation
② is also satisfied.
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
17/23
TSZ02201-0R2R0G100400-1-2
28.AUG.2012 Rev.001
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BU9831 | 制造商:ROHM 制造商全称:Rohm 功能描述:Non-volatile electronic potentiometer |
| BU9831F | 制造商:ROHM 制造商全称:Rohm 功能描述:Non-volatile electronic potentiometer |
| BU9832GUL-W | 制造商:ROHM 制造商全称:Rohm 功能描述:WL-CSP EEPROM family SPI BUS |
| BU9832GUL-W_10 | 制造商:ROHM 制造商全称:Rohm 功能描述:WL-CSP EEPROM family SPI BUS |
| BU9832GUL-WE2 | 功能描述:电可擦除可编程只读存储器 电可擦除可编程只读存储器 Serial-SPI 8Kb 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 |
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