Datasheet > DP83848J_14

DP83848J_14

更新时间： 2022-10-12 16:35:52

品牌	Logo	应用领域
德州仪器 - TI		局域网（LAN）标准
页数	文件大小	规格书
80页	705K
描述
PHYTER Mini LS Commercial Temperature Single Port 10/100 Mb/s Ethernet Transceiver

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DP83848J_14 数据手册

8.2.21 100BASE-TX Signal Detect Timing

PMD Input Pair

T2.21.1

T2.21.2

SD+ internal

Parameter

T2.21.1

Description

Notes

Min

Typ Max Units

SD Internal Turn-on Time

SD Internal Turn-off Time

T2.21.2

350

µs

Note: The signal amplitude on PMD Input Pair must be TP-PMD compliant.

8.2.22 100 Mb/s Internal Loopback Timing

TX_CLK

TX_EN

TXD[3:0]

CRS

T2.22.1

RX_CLK

RX_DV

RXD[3:0]

Parameter

Description

Notes

Min

Typ Max Units

240 ns

T2.22.1

TX_EN to RX_DV Loopback

100 Mb/s internal loopback mode

Note: Due to the nature of the descrambler function, all 100BASE-TX Loopback modes will cause an initial “dead-time”

of up to 550 µs during which time no data will be present at the receive MII outputs. The 100BASE-TX timing specified is

based on device delays after the initial 550µs “dead-time”.

Note: Measurement is made from the first rising edge of TX_CLK after assertion of TX_EN.

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