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TCA9554A 远程 8 位 I2C 和 SMBus I/O 扩展器

This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 1.65-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].

The TCA9554A consists of one 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion (active high or active low) registers. At power on, the I/Os are configured as inputs with a weak pullup to VCC. 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

TCA9554A
Interrupt Output Yes
fSCLK(Max)(MHz) 401
VCC(Min)(V) 1.65
VCC(Max)(V) 5.5
Pin/Package 16TSSOP
Operating Temperature Range(°C) -40 to 85
Max Frequency(kHz) 400
I2C Address 0111xxx
# of I/Os 8
Vcc range(V) 1.65 - 5.5
Low Power Yes
Configuration Registers Yes
5V Tolerant I/O Yes
TCA9554A 特性
TCA9554A 芯片订购指南
器件 状态 温度 价格 封装 | 引脚 封装数量 | 封装载体 丝印标记
TCA9554APWR ACTIVE -40 to 85 0.85 | 1ku TSSOP (PW) | 16 2000 | LARGE T&R  
TCA9554A 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
TCA9554APWR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TCA9554APWR TCA9554APWR
TCA9554A 应用技术支持与电子电路设计开发资源下载
  1. TCA9554A 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器I2C 逻辑器件产品选型与价格 . xls
  3. Logic Guide 2009 (PDF 4263 KB)
  4. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
  5. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
  6. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
  7. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
  8. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
  9. Designing With Logic (PDF 186 KB)
  10. Live Insertion (PDF 150 KB)
  11. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
  12. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
  13. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  14. LOGIC Pocket Data Book (PDF 6001 KB)
  15. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  16. Logic Cross-Reference (PDF 2938 KB)