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LAN9220 bảng dữ liệu(PDF) 123 Page - Microchip Technology

tên linh kiện LAN9220
Giải thích chi tiết về linh kiện  16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
PDF  142 Pages
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9220 bảng dữ liệu(HTML) 123 Page - Microchip Technology

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 2006-2017 Microchip Technology Inc.
DS00002417A-page 123
LAN9220
6.9
Power Sequence Timing
Figure 6-8 illustrates the device’s power sequencing requirements. Device power supplies can turn on in any order pro-
vided they all reach operational levels within the specified time period tpon. Device power supplies can turn off in any
order provided they all reach 0 volts within the specified time period tpoff..
FIGURE 6-8:
POWER SEQUENCE TIMING
TABLE 6-9:
POWER SEQUENCE TIMING
Parameter
Description
MIN
TYP
MAX
Units
Notes
tpon
Power supply turn on time
50
ms
tpoff
Power supply turn off time
500
ms
Note:
• Power must be applied and removed to all 3.3V power supply pins simultaneously (including the Ethernet mag-
netics).
• Power must be applied and removed to all VDDVARIO power supply pins simultaneously.
VDDVARIO
3.3V (All)
tpon
tpoff



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