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PCA9544A

現行

具中斷和電壓轉換的 4 通道 2.3- 至 5.5V I2C/SMBus 多工器

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TCA9544A 現行 具中斷和電壓轉換的 4 通道 1.65- 至 5.5V I2C/SMBus 多工器 Performance enhancements for power-on reset and lower voltage operation.

產品詳細資料

Addresses 8 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.3 Features Interrupt pin Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85 Number of channels 4
Addresses 8 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.3 Features Interrupt pin Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85 Number of channels 4
SOIC (DW) 20 131.84 mm² 12.8 x 10.3 TSSOP (PW) 20 41.6 mm² 6.5 x 6.4 TVSOP (DGV) 20 32 mm² 5 x 6.4 VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • 1-of-4 Bidirectional translating switches
  • I2C Bus and SMBus compatible
  • Four active-low interrupt inputs
  • Active-low interrupt output
  • Three address pins, allowing up to eight devices on the I2C Bus
  • Channel selection via I2C Bus
  • Power up with all switch channels deselected
  • Low RON switches
  • Allows voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
  • No glitch on power up
  • Supports hot insertion
  • Low standby current
  • Operating power-supply voltage range of 2.3 V to 5.5 V
  • 5.5-V Tolerant inputs
  • 0 to 400-kHz Clock frequency
  • Latch-up performance exceeds 100 mA Per JESD 78
  • ESD Protection exceeds JESD 22
    • 2000-V Human-body model (A114-A)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)
  • 1-of-4 Bidirectional translating switches
  • I2C Bus and SMBus compatible
  • Four active-low interrupt inputs
  • Active-low interrupt output
  • Three address pins, allowing up to eight devices on the I2C Bus
  • Channel selection via I2C Bus
  • Power up with all switch channels deselected
  • Low RON switches
  • Allows voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
  • No glitch on power up
  • Supports hot insertion
  • Low standby current
  • Operating power-supply voltage range of 2.3 V to 5.5 V
  • 5.5-V Tolerant inputs
  • 0 to 400-kHz Clock frequency
  • Latch-up performance exceeds 100 mA Per JESD 78
  • ESD Protection exceeds JESD 22
    • 2000-V Human-body model (A114-A)
    • 200-V Machine model (A115-A)
    • 1000-V Charged-device model (C101)

The PCA9544A is a 4-channel, bidirectional translating multiplexer controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is determined by the contents of the programmable control register. Four interrupt inputs ( INT3INT0), one for each of the downstream pairs, are provided. One interrupt output ( INT) acts as an AND of the four interrupt inputs.

A power-on reset function puts the registers in their default state and initializes the I2C state machine, with no channel selected.

The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage, which will be passed by the PCA9544A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant.

The PCA9544A is a 4-channel, bidirectional translating multiplexer controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is determined by the contents of the programmable control register. Four interrupt inputs ( INT3INT0), one for each of the downstream pairs, are provided. One interrupt output ( INT) acts as an AND of the four interrupt inputs.

A power-on reset function puts the registers in their default state and initializes the I2C state machine, with no channel selected.

The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage, which will be passed by the PCA9544A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant.

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技術文件

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檢視所有 12
類型 標題 日期
* Data sheet PCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer With Interrupt Logic datasheet (Rev. G) PDF | HTML 2021年 3月 11日
Application note I2C Solutions for Hot Swap Applications (Rev. A) 2023年 1月 31日
Application note I2C Dynamic Addressing 2019年 4月 25日
Selection guide Logic Guide (Rev. AB) 2017年 6月 12日
Application note Choosing the Correct I2C Device for New Designs PDF | HTML 2016年 9月 7日
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 2015年 12月 2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
Application note Troubleshooting I2C Bus Protocol 2009年 10月 19日
Application note Programming Fun Lights With TI's TCA6507 2007年 11月 30日
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 2004年 7月 8日

設計與開發

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模擬型號

PCA9544A IBIS Model

SCPM004.ZIP (149 KB) - IBIS Model
設計工具

I2C-DESIGNER — I2C 設計工具

Use the I2C Designer tool to quickly resolve conflicts in addressing, voltage level and frequency in I2C based designs. Enter master and slave inputs to automatically generate an I2C tree or easily build a custom solution. This tool will help designers save time and comply with the I2C standard (...)
模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
使用指南: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (DW) 20 Ultra Librarian
TSSOP (PW) 20 Ultra Librarian
TVSOP (DGV) 20 Ultra Librarian
VQFN (RGY) 20 Ultra Librarian

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  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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