- 制造厂商:TI
- 产品类别:接口
- 技术类目:I2C IC - I2C 通用 I/O (GPIO)
- 功能描述:移动 I/O 配套支持 Key-Scan、I/O 扩展、PWM 和 ACCESS.bus 主机接口
- 点击这里打开及下载LM8333的技术文档资料
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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 applications.
Key press and release events are encoded into a byte format and loaded into a FIFO buffer for retrieval by the host processor. 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. Interrupt and error codes are available to the host by reading dedicated registers.
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 available, which can be used as a general-purpose output if the PWM function is not required.
To minimize power, the LM8333 automatically enters a low-power standby mode when there is no keypad, I/O, or host activity.
The device is packaged in a 32–pin WQFN and a
49-pin csBGA. Both are chip-scale packages.
- 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
- Four General Purpose Host Programmable I/O Pins with Two Optional (Slow) External Interrupts
- 15-byte FIFO Buffer to Store Key Pressed and Key Released Events
- Error Control with Error Reports on (FIFO Overrun, Keypad Overrun, Invalid Command)
- Host Programmable PWM
- Host Programmable Active Time and Debounce Time
All trademarks are the property of their respective owners.
- Number of I/Os
- 4
- Features
- (x1) PWM, 72-input keypad scan, Reset pin
- Supply voltage (Min) (V)
- 2.25
- Supply voltage (Max) (V)
- 2.9
- Addresses
- 1
- Rating
- Catalog
- Frequency (Max) (kHz)
- 400
- Operating temperature range (C)
- -40 to 85
LM8333的完整型号有:LM8333FLQ8X/NOPB、LM8333FLQ8Y/NOPB、LM8333GGR8AXS/NOPB、LM8333GGR8AXSX/NOPB,以下是这些产品的关键参数及官网采购报价:
LM8333FLQ8X/NOPB,工作温度:-40 to 85,封装:WQFN (NJE)-32,包装数量MPQ:2500个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM8333FLQ8X/NOPB的批量USD价格:1.17(1000+)
LM8333FLQ8Y/NOPB,工作温度:-40 to 85,封装:WQFN (NJE)-32,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-3-260C-168 HR,引脚镀层/焊球材料:SN,TI官网LM8333FLQ8Y/NOPB的批量USD价格:1.08(1000+)
LM8333GGR8AXS/NOPB,工作温度:-40 to 85,封装:csBGA (NYC)-49,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SNAGCU,TI官网LM8333GGR8AXS/NOPB的批量USD价格:1.08(1000+)
LM8333GGR8AXSX/NOPB,工作温度:-40 to 85,封装:csBGA (NYC)-49,包装数量MPQ:3500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SNAGCU,TI官网LM8333GGR8AXSX/NOPB的批量USD价格:1.17(1000+)
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