TCA9555
- Low Standby-Current Consumption of 3.5 µA Maximum
- I2C to Parallel Port Expander
- Open-Drain Active-Low Interrupt Output
- 5-V Tolerant I/O Ports
- Compatible With Most Microcontrollers
- 400-kHz Fast I2C Bus
- Configurable Slave Address with 3 Address Pins
- Polarity Inversion Register
- Latched Outputs With High-Current Drive 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)
- 1000-V Charged-Device Model (C101)
This 16-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.
The TCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, the I/Os are configured as inputs. 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.
The TCA9555 is identical to the TCA9535, except for the inclusion of the internal I/O pull-up resistor, which pulls the I/O to a default high when configured as an input and undriven.
Three hardware pins (A0, A1, and A2) are used to program the I2C address, which allows up to eight TCA9555 devices to share the same I2C bus or SMBus. The fixed I2C address of the TCA9555 is the same as the PCF8575, PCF8575C, and PCF8574, allowing up to eight of these devices in any combination to share the same I2C bus or SMBus.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | TCA9555 Low-Voltage 16-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers datasheet (Rev. E) | PDF | HTML | 2019年 4月 1日 |
Application note | How to Configure an I2C Push-Pull IO Expander to Operate as Open Drain | PDF | HTML | 2024年 7月 17日 | |
Application note | I2C: What is the Auto Increment Feature? | PDF | HTML | 2024年 7月 5日 | |
Application note | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024年 7月 3日 | |
Application note | I2C Dynamic Addressing | 2019年 4月 25日 | ||
Application note | Choosing the Correct I2C Device for New Designs | PDF | HTML | 2016年 9月 7日 | |
Application note | Understanding the I2C Bus | PDF | HTML | 2015年 6月 30日 | |
Application note | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015年 2月 13日 | |
EVM User's guide | I/O Expander EVM User's Guide (Rev. A) | 2014年 7月 25日 |
設計與開發
如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。
I2C-DESIGNER — I2C 設計工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TINA-TI — 基於 SPICE 的類比模擬程式
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
SSOP (DB) | 24 | Ultra Librarian |
TSSOP (PW) | 24 | Ultra Librarian |
VQFN (RGE) | 24 | Ultra Librarian |
WQFN (RTW) | 24 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 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
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。