PCF8575C datasheet(21/38 Pages) TI1

tên linh kiện	PCF8575C

Giải thích chi tiết về linh kiện	SMBus Low-Power I/O Expander

PDF	38 Pages

Scroll/Zoom	100%

nhà sản xuất	TI1 [Texas Instruments]

Trang chủ	http://www.ti.com

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21 / 38 page

POR

PORF

Time

POR

Time

CC_GH

CC_GW

PCF8575C

www.ti.com

SCPS123F – MARCH 2005 – REVISED JANUARY 2015

Glitches in the power supply can also affect the power-on reset performance of this device. The glitch width

(VCC_GW) and height (VCC_GH) are dependent on each other. The bypass capacitance, source impedance, and

device impedance are factors that affect power-on reset performance. Figure 22 and Table 1 provide more

information on how to measure these specifications.

Figure 22. Glitch Width and Glitch Height

VPOR is critical to the power-on reset. VPOR 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 VPOR differs based

on the VCC being lowered to or from 0. Figure 23 and Table 1 provide more details on this specification.

Figure 23. VPOR

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