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TCA9554 Datasheet(PDF) 28 Page - Texas Instruments |
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TCA9554 Datasheet(HTML) 28 Page - Texas Instruments |
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28 / 48 page  VPORR 28 TCA9554 SCPS233E – MARCH 2012 – REVISED FEBRUARY 2017 www.ti.com Product Folder Links: TCA9554 Submit Documentation Feedback Copyright © 2012–2017, Texas Instruments Incorporated VPORR is critical to the power-on reset. VPORR is the voltage level at which the reset condition is released and all the registers and the I2C/SMBus state machine are initialized to their default states. The value of power-on-reset voltage differs based on the VCC being lowered to or from 0 (VPORR or VPORF). Figure 33 and Table 8 provide more details on this specification. Figure 33. Waveform Describing VCC Voltage Level at Which Power-On-Reset (POR) Occurs |
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