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LAN8804D датащи(PDF) 72 Page - Microchip Technology

номер детали LAN8804D
подробное описание детали  4-Port Gigabit Ethernet Transceiver with QSGMII Support
PDF  89 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN8804D датащи(HTML) 72 Page - Microchip Technology

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LAN8804D
DS00003591K-page 72
© 2026 Microchip Technology Inc. and its subsidiaries
6.6.5
MDC/MDIO TIMING
This section specifies the MDC/MDIO timing of the device. These timing numbers are valid for high-speed MDIO oper-
ation using push-pull MDIO buffers.
Note 6-18
The device can operate with MDC clock frequencies generated from bit banging in the 10s/100s of
Hertz.
Note 6-19
These values provide 2 ns margin beyond the IEEE specification.
FIGURE 6-5:
MDC/MDIO TIMING
TABLE 6-14:
MDC/MDIO TIMING VALUES
Symbol
Description
Min
Typ
Max
Unit
tclkp
MDC period
40
—
Note 6-18
ns
tclkh
MDC high time
10
—
—
ns
tclkl
MDC low time
10
—
—
ns
tval
MDIO (read from PHY) output valid from rising
MDIO of MDC
—
—
20
ns
tohold
MDIO (read from PHY) output hold from rising
edge of MDC
4—
—
ns
tsu
MDIO (write to PHY) input setup time to rising
edge of MDC
8
Note 6-19
——
ns
tihold
MDIO (write to PHY) input hold time after rising
edge of MDC
8
Note 6-19
——
ns
MDC
MDIO
tclkh
tclkl
tclkp
MDIO
tsu tihold
(Data-Out)
(Data-In)
tohold



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