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LM8333

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移動 I/O 配套支持 Key-Scan、I/O 擴展、PWM 和 ACCESS.bus 主機接口

產品詳情

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) (MHz) 0.4 Operating temperature range (°C) -40 to 85
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) (MHz) 0.4 Operating temperature range (°C) -40 to 85
CS-BGA (NYC) 49 16 mm2 4 x 4 WQFN (NJE) 32 36 mm2 6 x 6
  • 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.

  • 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.

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.

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.
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類型 標題 下載最新的英語版本 日期
* 數據表 Mobile I/O Companion Sup Key-Scan, I/O Expansion, PWM & ACCESS.bus Host I/F 數據表 (Rev. K) 2013年 5月 3日
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設計和開發

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用戶指南: PDF
英語版 (Rev.A): PDF
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封裝 引腳 CAD 符號、封裝和 3D 模型
CS-BGA (NYC) 49 Ultra Librarian
WQFN (NJE) 32 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續可靠性監測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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