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TCA9534 Datasheet(PDF) 21 Page - Texas Instruments |
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TCA9534 Datasheet(HTML) 21 Page - Texas Instruments |
21 / 34 page A1 A0 SDA SCL INT GND P6 P0 P1 P2 P3 P4 P5 P7 INT GND VCC VCC VCC 10 k (1) 10 k (1) 10 k 2 k 100 k (x 3) Master Controller TCA9534 INT RESET Subsystem 2 (e.g., counter) Subsystem 3 (e.g., alarm system) ALARM Controlled Device (e.g., CBT device) ENABLE A B VCC Subsystem 1 (e.g., temperature sensor) SDA SCL 15 14 16 13 3 2 1 8 12 11 10 9 7 6 5 4 A2 TCA9534 www.ti.com SCPS197A – SEPTEMBER 2014 – REVISED SEPTEMBER 2014 10 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 10.1 Application Information Figure 23 shows an application in which the TCA9534 can be used. 10.2 Typical Application (1) The SCL and SDA pins must be tied directly to VCC because if SCL and SDA are tied to an auxiliary power supply that could be powered on while VCC is powered off, then the supply current, ICC, will increase as a result. A. Device address is configured as 0100000 for this example. B. P0, P2, and P3 are configured as outputs. C. P1, P4, and P5 are configured as inputs. D. P6 and P7 are not used and must be configured as outputs. Figure 23. Application Schematic Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 21 Product Folder Links: TCA9534 |
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