General description

The PCA9549 provides eight bits of high speed TTL-compatible bus switching controlled by the I2C-bus. The low ON-state resistance of the switch allows connections to be made with minimal propagation delay. Any individual A to B channel or combination of channels can be selected via the I2C-bus, determined by the contents of the programmable Control register. When the I2C-bus bit is HIGH (logic 1), the switch is on and data can flow from Port A to Port B, or vice versa. When the I2C-bus bit is LOW (logic 0), the switch is open, creating a high-impedance state between the two ports, which stops the data flow.

Features

■ 8-bit bus switch (CBT)

■ 5 ? switch connection between two ports

■ I2C-bus interface logic; compatible with SMBus standards

■ Active LOW RESET input

■ 3 address pins allowing up to 8 devices on the I2C-bus

■ Bit selection via I2C-bus, in any combination

■ Power-up with all bits deselected

■ Low Ron switches

■ No glitch on power-up

■ Supports hot insertion

■ Low standby current

■ Operating power supply voltage range of 2.3 V to 5.5 V

■ 5 V tolerant inputs

■ 0 Hz to 400 kHz clock frequency

■ ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

■ Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

■ Packages offered: SO24, TSSOP24, HVQFN24

PCA9549D屬于集成電路（IC） > 專用。恩智浦半導(dǎo)體公司制造生產(chǎn)的PCA9549D專用該系列產(chǎn)品可提供所需的功能，用以將信息源/信宿連到各種復(fù)雜或范圍狹窄應(yīng)用中的傳感器、變送器、致動(dòng)器、傳輸介質(zhì)或其他此類(lèi)端點(diǎn)。例如，汽車(chē)安全氣囊驅(qū)動(dòng)器、車(chē)身控制和信息娛樂(lè)總線、自適應(yīng)電纜均衡器、智能卡等等。