TCA9537
- I2C to GPIO expander
- Operating power-supply voltage range of 1.65 V to 5.5 V
- 5-V Tolerant I/O ports
- Software Reset via I2C General Call
- RESET input pin for external reset control
- Dedicated INT output
- 1-MHz Fast mode plus I2C bus
- Input and output configuration register
- Polarity inversion register
- Internal power-on reset
- Power-up with all channels configured as inputs
- Noise filter on SCL and SDA inputs
- Latched outputs with high-current drive maximum capability for directly driving LEDs
- ESD protection exceeds JESD 22
- 2000-V Human-body model (A114-A)
- 1000-V Charged-device model (C101)
The TCA9537 is a 4-bit I/O expander for the I2C bus and 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 system controller can enable the I/Os as either inputs or outputs by writing to the I/O configuration register 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 TCA9537 open-drain interrupt output (INT) is activated when any input differs from its corresponding Input Port register state and is used to indicate to the system controller that an input state has changed.
The system processor can reset the TCA9537 in the event of a timeout or other improper operation by using an I2C soft reset command, which puts the registers in their default state , or with the use of the RESET pin.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TCA9537 Remote 4-Bit I2C and SMBus I/O Expander with Configuration Registers datasheet | PDF | HTML | 2021年 6月 15日 |
| Application note | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024年 7月 3日 | |
| User guide | TCA9536EVM User's Guide | PDF | HTML | 2021年 9月 1日 |
設計與開發
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TCA9536EVM — 適用 4 位元 I²C I/O 擴展器的 TCA9536 評估模組
TCA9536 評估模組提供使用者測試 TCA9536 和 TCA9537 的選項。評估模組可在 SDA/SCL 上實現可調式上拉電阻，以及開機和 GPO 的 LED 指示燈。
I2C-DESIGNER — I2C 設計工具
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|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
訂購與品質
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