主页 接口 I2C & I3C ICs I2C 通用 I/O (GPIO)

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

TCA6424 不推荐用于新设计
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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.

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.

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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
应用手册 Programming Fun Lights With TI's TCA6507 2007年 11月 30日

设计和开发

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仿真模型

TCA6424 IBIS Model

SCPM015.ZIP (138 KB) - IBIS Model
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

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TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能,允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

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用户指南: PDF
英语版 (Rev.A): PDF
参考设计

TIDA-00309 — DisplayPort 视频 4:1 聚合参考设计

这款经过验证的参考设计是一个完整的四通道 DisplayPort 聚合与解聚解决方案。其中使用一个 TLK10022 将四个同步 DisplayPort (DP) 源一起聚合到一条 10.8 Gbps 串行链路中。串行数据经由铜缆或光缆传输,其中使用另一个 TLK10022 来解聚并无缝重现原始视频内容。
测试报告: PDF
原理图: PDF
参考设计

TIDA-00269 — 千兆以太网链路聚合器参考设计

千兆位以太网链路聚合器参考设计采用了 TLK10081 器件,这是一种多速率链路聚合器,用于高速双向点对点数据传输系统,可将低速串行链路多路复用为高速串行链路,从而降低物理链路的数目。此参考设计帮助客户降低需要在应用中实施和管理的串行链路的数目。TLK10081 让客户可以聚合与解聚多个串行链路 - 所有类型的串行链路,包括原始数据类型。此外,还采用 CDCM6208 器件,该器件可以向没有极低抖动时钟输入(或不符合系统的抖动要求)的客户系统中的 TLK10081 提供该时钟输入。通道 A 的高速信号已经被路由到 SFP+ 模块,以便在实施光缆配置的系统中轻松评估。通道 B (...)
测试报告: PDF
原理图: PDF
参考设计

TIDA-00234 — 用于具有两个或更多 SFP+ 光纤端口的系统的双通道 XAUI 转 SFI 参考设计

TIDA-00234 XAUI 至 SFI 参考设计适用于企业和服务提供商网络应用,如实现多个 10G 以太网兼容光学 (SFP+) 端口的以太网交换机和路由器等。该参考设计采用 TLK10232 器件,该器件是最紧凑型双通道 XAUI 至 SFI 收发器,在同类产品中具有最低的功耗。此参考设计允许访问由 TLK10232(通过 SMA 连接器)或 SFP+ 模块(通过 SFP+ 光学模块仓)生成的高速信号(高达 10Gbps)。此外,还采用 CDCM6208 器件,该器件可以向没有极低抖动时钟输入(或不符合系统的抖动要求)的客户系统中的 TLK10232 提供该时钟输入。
测试报告: PDF
原理图: PDF
封装 引脚 下载
UQFN (RGJ) 32 查看选项

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

支持和培训

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