LAN8742AI-CZ datasheet(115/124 Pages) MICROCHIP

부품명	LAN8742Ai-CZ

상세설명	Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR짰 Technology

PDF	124 Pages

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제조업체	MICROCHIP [Microchip Technology]

홈페이지	http://www.microchip.com

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115 / 124 page

 2013-2015 Microchip Technology Inc.

DS00001989A-page 115

LAN8742A/LAN8742Ai

Note 1: The maximum allowable values for frequency tolerance and frequency stability are application dependent.

Since any particular application must meet the IEEE ±50 ppm Total PPM Budget, the combination of these

two values must be approximately ±45 ppm (allowing for aging).

2: Frequency Deviation Over Time is also referred to as Aging.

3: The total deviation for the Transmitter Clock Frequency is specified by IEEE 802.3u as

±50 ppm.

4: The crystal must support 100 µW operation to utilize this circuit.

5: 0°C for commercial version, -40°C for industrial version

6: +70°C for commercial version, +85°C for industrial version

7: This number includes the pad, the bond wire and the lead frame. PCB capacitance is not included in this

value. The XTAL1/CLKIN pin, XTAL2 pin and PCB capacitance values are required to accurately calculate

the value of the two external load capacitors (C1 and C2 in Figure 5-8). The external load capacitors, C1 and

C2, determine the accuracy of the 25.000 MHz frequency.

LAN8742Ai-CZ 데이터시트(PDF) 115 Page - Microchip Technology