主页 接口 I2C & I3C ICs I2C & I3C level shifters, buffers & hubs
主页
接口
I2C & I3C ICs
I2C & I3C level shifters, buffers & hubs

TCA4311

不推荐用于新设计

2 位双向 2.7V 至 5.5V 热插拔 400kHz I2C/SMBus 缓冲器

立即订购
数据表
TCA4311 不推荐用于新设计
虽然我们会继续生产此产品供先前的设计使用，但不推荐在新设计中使用此产品。请考虑从这些替代产品中选择一款：
open-in-new 比较替代产品
功能与比较器件相似
TCA4311A 正在供货 2 位双向 2.7V 至 5.5V 热插拔 400kHz I2C/SMBus 缓冲器 The TCA4311A is a p2p replacement for the TCA4311. There are enhanced features related to the TCA4311A, making it most robust.

TCA4311

不推荐用于新设计
数据表 立即订购

产品详情

Frequency (max) (MHz) 0.4 Rating Catalog Operating temperature range (°C) -40 to 85
Frequency (max) (MHz) 0.4 Rating Catalog Operating temperature range (°C) -40 to 85
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Operating Power-Supply Voltage Range of 2.7-V to 5.5-V
  • Supports Bidirectional Data Transfer of I2C Bus Signals
  • SDA and SCL Lines Are Buffered Which Increases Fanout
  • 1-V Precharge on All SDA and SCL Lines Prevents Corruption During Live Board Insertion and Removal From Backplane
  • SDA and SCL Input Lines Are Isolated From Outputs
  • Accommodates Standard Mode and Fast Mode I2C Devices
  • Applications Include Hot Board Insertion and Bus Extension
  • Low ICC Chip Disable of <1 μA
  • READY Open-Drain Output
  • Supports Clock Stretching, Arbitration, and Synchronization
  • Powered-Off High-Impedance I2C Pins
  • Open-Drain I2C Pins
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-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 2.7-V to 5.5-V
  • Supports Bidirectional Data Transfer of I2C Bus Signals
  • SDA and SCL Lines Are Buffered Which Increases Fanout
  • 1-V Precharge on All SDA and SCL Lines Prevents Corruption During Live Board Insertion and Removal From Backplane
  • SDA and SCL Input Lines Are Isolated From Outputs
  • Accommodates Standard Mode and Fast Mode I2C Devices
  • Applications Include Hot Board Insertion and Bus Extension
  • Low ICC Chip Disable of <1 μA
  • READY Open-Drain Output
  • Supports Clock Stretching, Arbitration, and Synchronization
  • Powered-Off High-Impedance I2C Pins
  • Open-Drain I2C Pins
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-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.

The TCA4311 is a hot swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.

When the I2C bus is idle, the TCA4311 can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311 resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low.

Both the backplane and card may be powered with supply voltages ranging from 2.7 V to 5.5 V, with no restrictions on which supply voltage is higher.

The TCA4311 has standard open-drain I/Os. The size of the pullup resistors to the I/Os depends on the system, but each side of this buffer must have a pullup resistor. The device is designed to work with Standard Mode and Fast Mode I2C devices in addition to SMBus devices. Standard Mode I2C devices only specify 3 mA in a generic I2C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.

The TCA4311 is a hot swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.

When the I2C bus is idle, the TCA4311 can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311 resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low.

Both the backplane and card may be powered with supply voltages ranging from 2.7 V to 5.5 V, with no restrictions on which supply voltage is higher.

The TCA4311 has standard open-drain I/Os. The size of the pullup resistors to the I/Os depends on the system, but each side of this buffer must have a pullup resistor. The device is designed to work with Standard Mode and Fast Mode I2C devices in addition to SMBus devices. Standard Mode I2C devices only specify 3 mA in a generic I2C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.
open-in-new 查找其他 I2C & I3C level shifters, buffers & hubs
下载 观看带字幕的视频 视频

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 TCA4311 Hot Swappable 2-Wire Bus Buffers 数据表 (Rev. A) 2014年 6月 12日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

仿真模型

HSPICE Model for TCA4311

SCPJ002.ZIP (237 KB) - HSpice Model
下载
仿真模型

TCA4311 IBIS Model

SCPM012.ZIP (44 KB) - IBIS Model
下载
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。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)
发送申请
模拟工具

TINA-TI — 基于 SPICE 的模拟仿真程序

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”。

TINA-TI 安装需要大约 500MB。直接安装，如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能，但不支持完整版 TINA 所提供的某些其他功能。

如需获取可用 TINA-TI 模型的完整列表，请参阅：SpiceRack - 完整列表 

需要 HSpice (...)

用户指南: PDF
英语版 (Rev.A): PDF
查看选项
封装 引脚 下载
SOIC (D) 8 查看选项
VSSOP (DGK) 8 查看选项
应遵守 TI 评估类商品的标准条款与条件。

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

视频