主页 接口 I2C & I3C ICs I2C 通用 I/O (GPIO)
主页
接口
I2C & I3C ICs
I2C 通用 I/O (GPIO)

TCA6424

不推荐用于新设计

具有中断输出、复位和配置寄存器的 24 位转换 1.65V 至 5.5V I2C/SMBus I/O 扩展器

立即订购
数据表
TCA6424 不推荐用于新设计
该产品会持续为现有客户提供。新设计应考虑替代产品。
open-in-new 比较替代产品
功能与比较器件相似
TCA6424A 正在供货 具有中断输出、复位和配置寄存器的 24 位转换 1.65V 至 5.5V I2C/SMBus I/O 扩展器 TCA6424A is an enhanced version of the TCA6424 with performance enhancements related to Interrupt and Reset.

TCA6424

不推荐用于新设计
数据表 立即订购

产品详情

Number of I/Os 24 Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 5.5 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
Number of I/Os 24 Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 5.5 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
UQFN (RGJ) 32 25 mm² 5 x 5
  • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
  • Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between:
    • 1.8-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
    • 2.5-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
    • 3.3-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
    • 5-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
  • I2C to Parallel Port Expander
  • Low Standby Current Consumption of 1 μA
  • Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs
    • Vhys = 0.18 V Typ at 1.8 V
    • Vhys = 0.25 V Typ at 2.5 V
    • Vhys = 0.33 V Typ at 3.3 V
    • Vhys = 0.5 V Typ at 5 V
  • 5-V Tolerant I/O Ports
  • Active-Low Reset (RESET) Input
  • Open-Drain Active-Low Interrupt (INT) Output
  • 400-kHz Fast I2C Bus
  • Input/Output Configuration Register
  • Polarity Inversion Register
  • Internal Power-On Reset
  • Power Up With All Channels Configured as Inputs
  • No Glitch On Power Up
  • Noise Filter on SCL/SDA Inputs
  • Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

All trademarks are the property of their respective owners.

  • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
  • Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between:
    • 1.8-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
    • 2.5-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
    • 3.3-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
    • 5-V SCL/SDA and
      1.8-V, 2.5-V, 3.3-V, or 5-V P Port
  • I2C to Parallel Port Expander
  • Low Standby Current Consumption of 1 μA
  • Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs
    • Vhys = 0.18 V Typ at 1.8 V
    • Vhys = 0.25 V Typ at 2.5 V
    • Vhys = 0.33 V Typ at 3.3 V
    • Vhys = 0.5 V Typ at 5 V
  • 5-V Tolerant I/O Ports
  • Active-Low Reset (RESET) Input
  • Open-Drain Active-Low Interrupt (INT) Output
  • 400-kHz Fast I2C Bus
  • Input/Output Configuration Register
  • Polarity Inversion Register
  • Internal Power-On Reset
  • Power Up With All Channels Configured as Inputs
  • No Glitch On Power Up
  • Noise Filter on SCL/SDA Inputs
  • Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

All trademarks are the property of their respective owners.

This 24-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)].

The major benefit of this device is its wide VCC range. It can operate from 1.65 V to 5.5 V on the P-port side and on the SDA/SCL side. This allows the TCA6424 to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to the dropping power supplies of microprocessors and microcontrollers, some PCB components, such as LEDs, remain at a 5-V power supply.

The bidirectional voltage level translation in the TCA6424 is provided through VCCI. VCCI should be connected to the VCC of the external SCL/SDA lines. This indicates the VCC level of the I2C bus to the TCA6424. The voltage level on the P-port of the TCA6424 is determined by the VCCP.

The TCA6424 consists of three 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion (active high) registers. At power on, the I/Os are configured as inputs. However, the system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding input or output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

The system master can reset the TCA6424 in the event of a timeout or other improper operation by asserting a low in the RESET input. The power-on reset puts the registers in their default state and initializes the I2C/SMBus state machine. The RESET pin causes the same reset/initialization to occur without depowering the part.

The TCA6424 open-drain interrupt (INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the TCA6424 can remain a simple slave device.

The device P-port outputs have high-current sink capabilities for directly driving LEDs while consuming low device current.

One hardware pin (ADDR) can be used to program and vary the fixed I2C address and allow up to two devices to share the same I2C bus or SMBus.

This 24-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)].

The major benefit of this device is its wide VCC range. It can operate from 1.65 V to 5.5 V on the P-port side and on the SDA/SCL side. This allows the TCA6424 to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to the dropping power supplies of microprocessors and microcontrollers, some PCB components, such as LEDs, remain at a 5-V power supply.

The bidirectional voltage level translation in the TCA6424 is provided through VCCI. VCCI should be connected to the VCC of the external SCL/SDA lines. This indicates the VCC level of the I2C bus to the TCA6424. The voltage level on the P-port of the TCA6424 is determined by the VCCP.

The TCA6424 consists of three 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion (active high) registers. At power on, the I/Os are configured as inputs. However, the system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding input or output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

The system master can reset the TCA6424 in the event of a timeout or other improper operation by asserting a low in the RESET input. The power-on reset puts the registers in their default state and initializes the I2C/SMBus state machine. The RESET pin causes the same reset/initialization to occur without depowering the part.

The TCA6424 open-drain interrupt (INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the TCA6424 can remain a simple slave device.

The device P-port outputs have high-current sink capabilities for directly driving LEDs while consuming low device current.

One hardware pin (ADDR) can be used to program and vary the fixed I2C address and allow up to two devices to share the same I2C bus or SMBus.
filter 查找其他 I2C 通用 I/O (GPIO)
下载

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 1
类型 标题 下载最新的英语版本 日期
* 数据表 TCA6424 Low Voltage 24-Bit I2C and SMBus I/O Expander 数据表 (Rev. B) 2014年 6月 12日

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点