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Advanced 10/100 Unmanaged Repeater — LXT9883/9863

Datasheet

Document #: 249115

Revision #: 003

Rev. Date: 08/07/01

Figure 19. 100BASE-TX MII-to-TP Port Timing

Table 28. 100BASE-TX MII-to-TP Port Timing Parameters

Parameter

Sym

Min

Typ

Max

Units

Test Condition

TXD, TX_EN, TX_ER Setup to TX_CLK High

t2A

––

–

TXD, TX_EN, TX_ER Hold from TX_CLK High

t2B

––

–

TX_EN sampled to CRS asserted

t2C

–

4BT

–

TX_EN sampled to CRS de-asserted

t2D

–

TX_EN sampled to TPOP/N active (Tx latency)

t2E

––

–

1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.

2. Bit Time (BT) is the duration of one bit as transferred to/from the MAC and is the reciprocal of bit rate. BT for

100BASE-T = 10-8 s or 10ns.

TX_CLK

TXD,

TX_EN,

TX_ER

CRS

TPOP/N

t2A

t2B

t2C

t2D

t2E

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