28

www.national.com

6.2 A.C. Specifications

6.2.1 Receive Timing

Note 1: “CRSx” and “RXEx” refer to any of the CRS[11:0] signals. In the event of a collision (more than one CRS is

active) none of the RXE signals will be asserted.

Note 2: If, after 4 RXC clocks from CRSx going high, no aligned data is received, the DP83850C 100RIC will repeat the

JAM pattern.

Description

Min

Max

Units

T0 CRSx to RXEx assertion delay (Note 1)

18

ns

T1 CRSx to RXEx de-assertion delay with no collision

3

5

LCK

T2 CRSx to RX_DV delay requirement (Note 2)

40

ns

Description

Min

Max

Units

T3 /IRD_V setup to IRD_CK high

2

ns

T4 /IRD_V hold from IRD_CK high

2

ns

T5 IRD[3:0] or /IRD_ER setup to IRD_CK high

2

ns

T6 IRD[3:0] or /IRD_ER hold from IRD_CK high

2

ns