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LM8333GGR8 PDF预览

LM8333GGR8

更新时间： 2024-11-27 02:59:23
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
18页 621K
描述
Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface

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LM8333GGR8 技术参数

是否Rohs认证： 符合生命周期：Transferred
包装说明：MICRO ARRAY-49Reach Compliance Code：unknown
HTS代码：8542.31.00.01风险等级：5.05
JESD-30 代码：S-PBGA-B49JESD-609代码：e1
长度：4 mm湿度敏感等级：1
端子数量：49最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：TFBGA封装等效代码：BGA49,7X7,20
封装形状：SQUARE封装形式：GRID ARRAY, THIN PROFILE, FINE PITCH
电源：2.5 V认证状态：Not Qualified
座面最大高度：1.1 mm子类别：Other Microprocessor ICs
最大压摆率：6 mA最大供电电压：2.75 V
最小供电电压：2.25 V标称供电电压：2.5 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin/Silver/Copper (Sn/Ag/Cu)
端子形式：BALL端子节距：0.5 mm
端子位置：BOTTOM宽度：4 mm
uPs/uCs/外围集成电路类型：MICROPROCESSOR CIRCUITBase Number Matches：1

LM8333GGR8 数据手册

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August 2007  
LM8333  
Mobile I/O Companion Supporting Key-Scan, I/O  
Expansion, PWM, and ACCESS.bus Host Interface  
The device is packaged in a 32–pin Leadless Leadframe  
package (LLP) and a 49-pin MICRO-ARRAY . Both are chip-  
scale packages.  
1.0 General Description  
The LM8333 Mobile I/O Companion offloads the burden of  
keyboard scanning from the host, while providing extremely  
low power consumption in both operational and standby  
modes. It supports keypad matrices up to 8 × 8 in size (plus  
another 8 special-function keys), for portable applications  
such as cellphones, PDAs, games, and other handheld ap-  
plications.  
2.0 Features  
8 × 8 standard keys  
■
■
8 special function keys (SF keys) providing a total of 72  
keys for the maximum keyboard matrix  
ACCESS.bus (I2C-compatible) communication interface  
to the host  
■
Key press and release events are encoded into a byte format  
and loaded into a FIFO buffer for retrieval by the host pro-  
cessor. An interrupt output (IRQ) is used to signal events such  
as keypad activity, a state change on either of two interrupt-  
capable general-purpose I/O pins, or an error condition. In-  
terrupt and error codes are available to the host by reading  
dedicated registers.  
Four general purpose host programmable I/O pins with  
two optional (slow) external Interrupts  
■
16 byte FIFO buffer to store key pressed and key released  
events  
■
Error control with error reports on (FIFO overrun, Keypad  
overrun, invalid command)  
■
Four general-purpose I/O pins are available, two of which  
have interrupt capability. A pulse-width modulated output  
based on a host-programmable internal timer is also avail-  
able, which can be used as a general-purpose output if the  
PWM function is not required.  
Host programmable PWM  
■
■
Host programmable active time and debounce time  
3.0 Applications  
To minimize power, the LM8333 automatically enters a low-  
power standby mode when there is no keypad, I/O, or host  
activity.  
Mobile phones  
■
■
■
■
Personal Digital Assistants (PDAs)  
Smart handheld devices  
Personal media players  
4.0 Block Diagram  
20210601  
I2C® is a registered trademark of Phillips Corporation.  
© 2007 National Semiconductor Corporation  
202106  
www.national.com  
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