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PCA9544APW Datasheet(PDF) 5 Page - NXP Semiconductors |
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PCA9544APW Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 27 page PCA9544A_3 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 03 — 24 November 2008 5 of 27 NXP Semiconductors PCA9544A 4-channel I2C-bus multiplexer with interrupt logic 5.2 Pin description [1] HVQFN20 package supply ground is connected to both VSS pin and exposed center pad. VSS pin must be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad on the board and for proper heat conduction through the board, thermal vias need to be incorporated in the PCB in the thermal pad region. Table 3. Pin description Symbol Pin Description SO20, TSSOP20 HVQFN20 A0 1 19 address input 0 A1 2 20 address input 1 A2 3 1 address input 2 INT0 4 2 active LOW interrupt input 0 SD0 5 3 serial data 0 SC0 6 4 serial clock 0 INT1 7 5 active LOW interrupt input 1 SD1 8 6 serial data 1 SC1 9 7 serial clock 1 VSS 10 8[1] supply ground INT2 11 9 active LOW interrupt input 2 SD2 12 10 serial data 2 SC2 13 11 serial clock 2 INT3 14 12 active LOW interrupt input 3 SD3 15 13 serial data 3 SC3 16 14 serial clock 3 INT 17 15 active LOW interrupt output SCL 18 16 serial clock line SDA 19 17 serial data line VDD 20 18 supply voltage |
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