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PCA9546ADRG4 Datasheet(PDF) 2 Page - Texas Instruments |
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PCA9546ADRG4 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 29 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) D, DGV, DW, OR PW PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 A0 A1 RESET SD0 SC0 SD1 SC1 GND V CC SDA SCL A2 SC3 SD3 SC2 SD2 RGY PACKAGE (TOP VIEW) 2 15 SDA A1 3 14 SCL RESET 4 13 A2 SD0 5 12 SC3 SC0 6 11 SD3 SD1 7 10 SC2 SC1 1 8 16 9 RGV PACKAGE (TOP VIEW) 8 13 16 5 6 15 7 14 1 12 SCL RESET 2 11 A2 SD0 10 SC3 3 SC0 4 9 SD3 SD1 PCA9546A 4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION SCPS148E – OCTOBER 2005 – REVISED JANUARY 2008 The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage, which will be passed by the PCA9546A. 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 communicate with 5-V 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 5.5-V tolerant. TERMINAL FUNCTIONS NO. NAME DESCRIPTION D, DGV, DW, PW, RGV AND RGY 1 15 A0 Address input 0. Connect directly to VCC or ground. 2 16 A1 Address input 1. Connect directly to VCC or ground. 3 1 RESET Active low reset input. Connect to VCC through a pullup resistor, if not used. 4 2 SD0 Serial data 0. Connect to VCC through a pullup resistor. 5 3 SC0 Serial clock 0. Connect to VCC through a pullup resistor. 6 4 SD1 Serial data 1. Connect to VCC through a pullup resistor. 7 5 SC1 Serial clock 1. Connect to VCC through a pullup resistor. 8 6 GND Ground 9 7 SD2 Serial data 2. Connect to VCC through a pullup resistor. 10 8 SC2 Serial clock 2. Connect to VCC through a pullup resistor. 11 9 SD3 Serial data 3. Connect to VCC through a pullup resistor. 12 10 SC3 Serial clock 3. Connect to VCC through a pullup resistor. 13 11 A2 Address input 2. Connect directly to VCC or ground. 14 12 SCL Serial clock line. Connect to VCC through a pullup resistor. 15 13 SDA Serial data line. Connect to VCC through a pullup resistor. 16 14 VCC Supply power 2 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9546A |
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