TCA9846
Ultra-low voltage, 1MHz, 4-channel I2C switch with reset
TCA9846
- 1-to-4 Bidirectional translating switches with ultra low voltage translation down to 0.65V
- I2C Bus and SMBus compatible
- Active-low reset input
- 2 address pins, allowing up to 16 TCA9846 devices on the I2C bus
- Channel selection through an I2C Bus, in any combination
- Power up with all switch channels deselected
- Low RON switches
- Allows voltage-level translation between 0.65V, 0.8, 1.2V, 1.8V, 2.5V, and 3.3V
- No glitch on power up
- Supports hot insertion
- Low standby current
- Operating power-supply voltage range of 1.65V to 3.6V
- 3.6V Tolerant inputs
- 0 to 1MHz Clock frequency
- Latch-up performance exceeds 100mA Per JESD 78, class II
- ESD Protection exceeds JESD 22
- ±2000V Human-body model (A114-A)
- ±500V Charged-device model (C101)
The TCA9846 is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register.
An active-low reset ( RESET) input allows the TCA9846 to recover from a situation in which one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function.
The pass gates of the switches are constructed so that VDD1/VDD2 pins can be used to limit the maximum high voltage, which is passed by the TCA9846. Limiting the maximum high voltage allows the use of different bus voltages on each pair, so that 0.65V, 0.8V, 1.2V, or 1.8V parts can communicate with 3.3V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 3.6V tolerant.
技術(shù)文檔
| 頂層文檔 | 類型 | 標(biāo)題 | 格式選項(xiàng) | 下載最新的英語(yǔ)版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 數(shù)據(jù)表 | TCA9846 Ultra Low-Voltage 4-Channel 1Mhz Capable I2 C Switch 數(shù)據(jù)表 | PDF | HTML | 2026年 3月 3日 | ||
| 應(yīng)用手冊(cè) | Multiplexer/Switch Solutions for Fast Mode Plus I2C Applications | PDF | HTML | 2026年 1月 14日 |
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訂購(gòu)和質(zhì)量
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- MSL 等級(jí)/回流焊峰值溫度
- MTBF/時(shí)基故障估算
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- 鑒定摘要
- 持續(xù)可靠性監(jiān)測(cè)
- 制造廠地點(diǎn)
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