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I2C 通用 I/O (GPIO)

TCA8418

現行

具中斷和 80 鍵支援的 18 位元 1.65 至 3.6-V 1MHz I2C/SMBus 鍵盤掃描儀

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產品規格表

TCA8418

現行
產品規格表 立即訂購

產品詳細資料

Number of I/Os 18 Features 1-MHz maximum frequency, 80-input keypad scan, Debounce filter Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 3.6 Addresses 1 Rating Catalog Frequency (max) (MHz) 1 Operating temperature range (°C) -40 to 85
Number of I/Os 18 Features 1-MHz maximum frequency, 80-input keypad scan, Debounce filter Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 3.6 Addresses 1 Rating Catalog Frequency (max) (MHz) 1 Operating temperature range (°C) -40 to 85
WQFN (RTW) 24 16 mm² 4 x 4
  • Operating Power-Supply Voltage Range of 1.65-V to 3.6-V
  • Supports 80 Buttons With Use of 18 GPIOs
  • Supports QWERTY Keypad Operation Plus GPIO Expansion
  • Low Standby (Idle) Current Consumption: 3 µA
  • Supports 1-MHz Fast Mode Plus I2C Bus
  • 10 Byte FIFO to Store 10 Key Presses and Releases
  • Open-Drain Active-Low Interrupt Output
  • Integrated Debounce Time of 50 µs
  • Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs: Typical Vhys at 1.8 V is 0.18 V
  • Latch-Up Performance Exceeds 200 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22 on all 18 GPIO Pins and non GPIO pins
    • 2000-V Human Body Model (A114-A)
    • 1000-V Charged Device Model (C101)
  • Operating Power-Supply Voltage Range of 1.65-V to 3.6-V
  • Supports 80 Buttons With Use of 18 GPIOs
  • Supports QWERTY Keypad Operation Plus GPIO Expansion
  • Low Standby (Idle) Current Consumption: 3 µA
  • Supports 1-MHz Fast Mode Plus I2C Bus
  • 10 Byte FIFO to Store 10 Key Presses and Releases
  • Open-Drain Active-Low Interrupt Output
  • Integrated Debounce Time of 50 µs
  • Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs: Typical Vhys at 1.8 V is 0.18 V
  • Latch-Up Performance Exceeds 200 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22 on all 18 GPIO Pins and non GPIO pins
    • 2000-V Human Body Model (A114-A)
    • 1000-V Charged Device Model (C101)

The TCA8418 is a keypad scan device with integrated ESD protection. It can operate from 1.65 V to 3.6 V and has 18 general purpose inputs/outputs (GPIO) that can be used to support up to 80 keys via the I2C interface.

The key controller debounces inputs and maintains a 10 byte FIFO of key-press and release events which can store up to 10 keys with overflow wrap capability. An interrupt (INT) output can be configured to alert key presses and releases either as they occur, or at maximum rate.

The TCA8418 is a keypad scan device with integrated ESD protection. It can operate from 1.65 V to 3.6 V and has 18 general purpose inputs/outputs (GPIO) that can be used to support up to 80 keys via the I2C interface.

The key controller debounces inputs and maintains a 10 byte FIFO of key-press and release events which can store up to 10 keys with overflow wrap capability. An interrupt (INT) output can be configured to alert key presses and releases either as they occur, or at maximum rate.
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類型 標題 日期
* Data sheet TCA8418 I2C Controlled Keypad Scan IC With Integrated ESD Protection datasheet (Rev. G) PDF | HTML 2018年 6月 25日
Application note Understanding Transient Drive Strength vs. DC Drive Strength in CMOS Output Buffers PDF | HTML 2024年 5月 14日
Application note Understanding the I2C Bus PDF | HTML 2015年 6月 30日
Application note Maximum Clock Frequency of I2C Bus Using Repeaters 2015年 5月 15日
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML 2015年 2月 13日
EVM User's guide TCA8418E Keypad Scan EVM User's Guide 2014年 8月 23日

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開發板

TCA8418E-EVM — 具有整合式 ESD 防護的 TCA8418E-EVM I2C 控制鍵盤掃描 IC 評估模組

The TCA8418E-EVM is an evaluation board designed to demonstrate the key scanning functionality of the TCA8418E keypad scan IC. The EVM comes with 9 buttons configured in a row/column matrix for easy testing. In addition, the 10x2 receptacle allows the customer to expand the functionality of the (...)

使用指南: PDF
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SCPC008 — TCA8418EVMGUI

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I2C 通用 I/O (GPIO)
TCA8418 — 具中斷和 80 鍵支援的 18 位元 1.65 至 3.6-V 1MHz I2C/SMBus 鍵盤掃描儀
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參考設計

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The TIDA-00818 is mobile point of sale (mPOS) reference design features a 1S1P Li-Ion battery architecture to reduce system size and cost. Integrated load switches are used to reduce standby power consumption and maximize battery life to enable the single-cell architecture. A USB Type-C charging (...)
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