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PCA9535HF Datasheet(PDF) 5 Page - NXP Semiconductors |
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PCA9535HF Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 31 page PCA9535_PCA9535C_5 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 05 — 15 September 2008 5 of 31 NXP Semiconductors PCA9535; PCA9535C 16-bit I2C-bus and SMBus, low power I/O port with interrupt 5.2 Pin description [1] HVQFN24 and HWQFN24 package die supply ground is connected to both the VSS pin and the exposed center pad. The 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. [2] PCA9535 I/Os are totem pole, whereas the I/Os on PCA9535C are open-drain. Table 3. Pin description Symbol Pin Description SO24, TSSOP24 HVQFN24, HWQFN24 INT 1 22 interrupt output (open-drain) A1 2 23 address input 1 A2 3 24 address input 2 IO0_0 4 1 port 0 input/output[2] IO0_1 5 2 IO0_2 6 3 IO0_3 7 4 IO0_4 8 5 IO0_5 9 6 IO0_6 10 7 IO0_7 11 8 VSS 12 9[1] supply ground IO1_0 13 10 port 1 input/output[2] IO1_1 14 11 IO1_2 15 12 IO1_3 16 13 IO1_4 17 14 IO1_5 18 15 IO1_6 19 16 IO1_7 20 17 A0 21 18 address input 0 SCL 22 19 serial clock line SDA 23 20 serial data line VDD 24 21 supply voltage |
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