TCAL9538
- Operating power-supply voltage range of 1.08V to 3.6V
- Low standby current consumption of 1µA typical at 1.8V
- 1MHz fast mode plus I2C bus
- Hardware address pin allows four devices on the same I2C, SMBus bus
- Active-low reset input (RESET)
- Open-drain active-low interrupt output (INT)
- Input or output configuration register
- Polarity inversion register
- Configurable I/O drive strength register
- Pull-up and pull-down resistor configuration register
- Internal power-on reset
- Noise filter on SCL or SDA inputs
- Latched outputs with high-current drive maximum capability for directly driving LEDs
- Latch-up performance exceeds 100mA per JESD 78, class II
- ESD protection exceeds JESD 22
- 4000V Human-body model (A114-A)
- 1000V Charged-device model (C101)
The TCAL9538 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol and is designed for 1.08V to 3.6V VCC operation.
The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I2C clock frequencies. I/O expanders such as the TCAL9538 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on.
The TCAL9538 has Agile I/O ports which include additional features designed to enhance the I/O performance in terms of speed, power consumption and EMI. The additional features are: programmable output drive strength, programmable pull-up and pull-down resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TCAL9538 8 -Bit I2 C-Bus, SMBus I/O Expander With Interrupt Output, Reset, and Agile I/O Configuration Registers datasheet (Rev. B) | PDF | HTML | 2025年 5月 7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 | Features of TCAL Agile I/O Expanders | PDF | HTML | 2023年 6月 6日 |
設計與開發
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訂購與品質
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- 材料內容
- 認證摘要
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- 晶圓廠位置
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