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TCA9847

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Ultra-low voltage, 1MHz, 8-channel I2C mux with reset

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数据表

TCA9847

预发布
数据表 立即订购

产品详情

Addresses 16 Supply voltage (max) (V) 3.6 Supply voltage (min) (V) 1.65 Features Reset pin Rating Catalog Frequency (max) (MHz) 1 Operating temperature range (°C) -40 to 125 Number of channels 8
Addresses 16 Supply voltage (max) (V) 3.6 Supply voltage (min) (V) 1.65 Features Reset pin Rating Catalog Frequency (max) (MHz) 1 Operating temperature range (°C) -40 to 125 Number of channels 8
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4
  • 1-to-8 bidirectional translating multiplexer with ultra low voltage translation down to 0.65V
  • I2C Bus and SMBus compatible
  • Active-low reset input
  • Two address pins, allowing up to 16 devices on the I2C bus
  • Channel selection through an I2C Bus, in any combination
  • Power up with all switch channels deselected
  • Low RON switches
  • Allows voltage-level translation between 0.65V, 0.8, 1.2V, 1.8V, 2.5V, and 3.3V
  • No glitch on power up
  • Supports hot insertion
  • Low standby current
  • Operating power-supply voltage range of 1.65V to 3.6V
  • 3.6V tolerant inputs
  • 0 to 1MHz clock frequency
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22
    • ±2000V human-body model (A114-A)
    • ±500V charged-device model (C101)
  • 1-to-8 bidirectional translating multiplexer with ultra low voltage translation down to 0.65V
  • I2C Bus and SMBus compatible
  • Active-low reset input
  • Two address pins, allowing up to 16 devices on the I2C bus
  • Channel selection through an I2C Bus, in any combination
  • Power up with all switch channels deselected
  • Low RON switches
  • Allows voltage-level translation between 0.65V, 0.8, 1.2V, 1.8V, 2.5V, and 3.3V
  • No glitch on power up
  • Supports hot insertion
  • Low standby current
  • Operating power-supply voltage range of 1.65V to 3.6V
  • 3.6V tolerant inputs
  • 0 to 1MHz clock frequency
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22
    • ±2000V human-body model (A114-A)
    • ±500V charged-device model (C101)

The TCA9847 device is an 8-channel, bidirectional translating multiplexer that can be controlled through the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. These downstream channels can be used to resolve I2C target address conflicts. For example, if eight identical digital temperature sensors are needed in the application, one sensor can be connected at each channel: 0-7.

The system controller can reset the TCA9847 in the event of a time-out, or other improper operation by asserting a low in the RESET input. Similarly, the power-on reset deselects all channels and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset and initialization to occur without powering down the part. This allows recovery if one of the downstream I2C buses get stuck in a low state.

The pass gates of the switches are constructed so that VDD1/VDD2 pins can be used to limit the maximum high voltage, which is passed by the TCA9847. Limiting the maximum high voltage allows the use of different bus voltages on each pair, so that 0.65V, 0.8V, 1.2V, or 1.8V parts can communicate with 3.3V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 3.6V tolerant.

The TCA9847 device is an 8-channel, bidirectional translating multiplexer that can be controlled through the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. These downstream channels can be used to resolve I2C target address conflicts. For example, if eight identical digital temperature sensors are needed in the application, one sensor can be connected at each channel: 0-7.

The system controller can reset the TCA9847 in the event of a time-out, or other improper operation by asserting a low in the RESET input. Similarly, the power-on reset deselects all channels and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset and initialization to occur without powering down the part. This allows recovery if one of the downstream I2C buses get stuck in a low state.

The pass gates of the switches are constructed so that VDD1/VDD2 pins can be used to limit the maximum high voltage, which is passed by the TCA9847. Limiting the maximum high voltage allows the use of different bus voltages on each pair, so that 0.65V, 0.8V, 1.2V, or 1.8V parts can communicate with 3.3V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 3.6V tolerant.
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* 数据表 TCA9847 Ultra Low-Voltage 8-Channel 1MHz Capable I2 C Multiplexer 数据表 PDF | HTML 2026年 4月 29日
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评估板

TCA984748-EVM — TCA984748 评估模块

TCA984748-EVM 用于评估 TCA9847 和 TCA9848 的性能。该评估模块 (EVM) 未随附焊接的单元。可以在产品页面底部在线订购样片。该 EVM 可让工程师评估 TCA9847 和 TCA9848 I2C 信号功能。该 EVM 具有一个 USB2ANY 公连接器，可通过 DUT 发送 I2C 信号。USB2ANY 微控制器必须单独购买，此 EVM 未随附。如果使用 USB2ANY 进行通信，则必须以凹口朝上的方式连接电缆。每个引脚的测试点都有多个接地点，以便于使用。负载电容器封装和上拉电阻器等其他功能可用于简化评估和测试。

用户指南: PDF | HTML
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评估板

TMUX-24PW-EVM — 适用于 16 引脚、20 引脚和 24 引脚 PW 薄型紧缩小外形封装 (TSSOP) 的 TMUX 通用评估模块

TMUX-24PW-EVM 评估模块支持对 TI TMUX 产品系列进行快速原型设计和直流表征，该产品系列采用 16、20 或 24 引脚 TSSOP 封装 (PW)，并适用于在高电压下运行。

用户指南: PDF | HTML
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评估板

TMUXBQB-DYYEVM — 采用 16 引脚 BQB、DYY 和 PW 封装的通用 TMUX 评估模块

TMUXBQB-DYYEVM 支持对采用 16 引脚 TSSOP (PW)、WQFN (BQB) 和 SOT-23 THIN (DYY) 封装的 TMUX 产品系列进行快速原型设计和直流表征。

用户指南: PDF | HTML
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仿真模型

TCA9847 IBIS Model

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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”。

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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
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