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PCA9549 Datasheet Octal Bus Switch

Manufacturer: NXP Semiconductors

Overview: PCA9549 Octal bus switch with individually I2C-bus controlled enables Rev. 02 — 13 July 2009 Product data sheet 1.

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.

Key Features

  • I 8-bit bus switch (CBT) I 5 Ω switch connection between two ports I I2C-bus interface logic; compatible with SMBus standards I Active LOW RESET input I 3 address pins allowing up to 8 devices on the I2C-bus I Bit selection via I2C-bus, in any combination I Power-up with all bits deselected I Low Ron switches I No glitch on power-up I Supports hot insertion I Low standby current I Operating power supply voltage range of 2.3 V to 5.5 V I 5 V tolerant inputs I 0 Hz to 400 kHz clock frequency I ESD.

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