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PCF8575C 데이터시트(PDF) 21 Page - Texas Instruments

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부품명 PCF8575C
상세설명  SMBus Low-Power I/O Expander
PDF  38 Pages
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI1 - Texas Instruments

PCF8575C 데이터시트(HTML) 21 Page - Texas Instruments

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V
CC
V
POR
V
PORF
Time
POR
Time
V
CC
Time
V
CC_GH
V
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
Copyright © 2005–2015, Texas Instruments Incorporated
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