参数资料
型号: WJLXT971ALC.A4-857344
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64
文件页数: 53/80页
文件大小: 931K
代理商: WJLXT971ALC.A4-857344
Page 57
Cortina Systems LXT972A Single-Port 10/100 Mbps PHY Transceiver
LXT972A PHY
Datasheet
249186, Revision 5.2
13 September 2007
7.2 AC Timing Diagrams and
Parameters
Table 31
10BASE-T Receive Timing Parameters
Parameter
Sym
Min
Typ1
Max
Units2
Test Conditions
RXD, RX_DV, RX_ER Setup to
RX_CLK High
t1
10
ns
RXD, RX_DV, RX_ER Hold from
RX_CLK High
t2
10
ns
TPIP/N in to RXD out (Rx latency)
t3
4.2
6.6
BT
CRS asserted to RXD, RX_DV,
RX_ER asserted
t4
5
32
BT
RXD, RX_DV, RX_ER de-asserted to
CRS de-asserted
t5
0.3
0.5
BT
TPI in to CRS asserted
t6
2
28
BT
TPI quiet to CRS de-asserted
t7
6
10
BT
TPI in to COL asserted
t8
1
31
BT
TPI quiet to COL de-asserted
t9
5
10
BT
1. Typical values are at 25 °C and are for design aid only, not guaranteed, and not subject to production
testing.
2. BT (Bit Time) is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit
rate. 10BASE-T bit time = 10-7 s or 100 ns.
Figure 24
10BASE-T Transmit Timing
TX_CLK
TXD,
TX_EN,
TX_ER
CRS
TPO
t1
t3
t4
t5
t2
B3460-01
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WJLXT971ALE.A4-857343 DATACOM, ETHERNET TRANSCEIVER, PQFP64
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