PCA9548 Datasheet | NXP Semiconductors

DESCRIPTION The PCA9548 is a octal bi-directional translating switch controlled by the I2C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCx/SDx channel or bination of channels can be selected, determined by the contents of the programmable Control Register. An active-LOW reset input allows the PCA9548 to recover from a situation where one of the downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin 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 such that the VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9548. This allows the use of different bus voltages on each pair, so that 1.8 V, 2.5 V, or 3.3 V parts can municate with 5 V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5 V tolerant. FEATURES - 1-of-8 bi-directional translating switches - I2C interface logic; patible with SMBus standards - Active LOW Reset Input - 3 address pins allowing up to 8 devices on the I2C-bus - Channel selection via I2C-bus, in any bination - Power-up with all switch channels deselected - Low Rds ON switches - Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and - No glitch on power-up - Supports hot insertion - Low stand-by current - Operating power supply voltage range of 2.3 V to 5.5 V - 5 V tolerant Inputs - 0 k Hz to 400 k Hz clock frequency - ESD protection exceeds 2000 V HBM per JESD22-A114, - Latchup testing is done to JESDEC Standard JESD78 which - Packages offered: SO24, TSSOP24 ORDERING INFORMATION PACKAGES 24-Pin Plastic SO TEMPERATURE RANGE - 40 °C to +85 °C exceeds 100 m A 150 V MM per JESD22-A115 and 1000 V per JESD22-C101 5 V buses ORDER CODE PCA9548D DRAWING NUMBER SOT137-1 SOT355-1 24-Pin Plastic TSSOP - 40 °C to +85 °C PCA9548PW...