LU3X31T-T64 Datasheet, PDF (6/44 Pages) Agere Systems – LU3X31T-T64 Single-Port 3 10/100 Ethernet Transceiver TX

LU3X31T-T64 Single-Port 3 V
10/100 Ethernet Transceiver TX
Preliminary Data Sheet
July 2000
Pin Descriptions
Table 2. Twisted-Pair Transceiver Control
Pin
No.
Pin Name
I/O
Pin Description
50
REF100
49
REF10
5
TPTXTR
I Reference Resistor for 100 Mbits/s Twisted-Pair Driver. Connect
this pin to ground through a 301 Ω resistor.
I Reference Resistor for 10 Mbits/s Twisted-Pair Driver. Connect
this pin to ground through a 4.64 kΩ resistor.
I Twisted-Pair Transmitter 3-State. A high on this pin will 3-state the
twisted-pair outputs. Tie to ground in normal operation.
Table 3. MII Interface
Pin
No.
Pin Name
I/O
Pin Description
18
RXDV
O Receive Data Valid. Signals the presence of data on RXD[3:0].
19
RXER
O Receive Error. Indicates a received coding error has occurred.
20
RXD3
O Receive Data[3].
21
RXD2
O Receive Data[2].
22
RXD1
O Receive Data[1].
23
RXD0
O Receive Data[0].
24
RXCLK
O Receive Clock.
27
TXEN
I Transmit Enable. Signals the presence of data on TXD[3:0].
28
TXER
I Transmit Error. Indicates a transmit coding error has occurred.
29
TXD3
I Transmit Data[3].
30
TXD2
I Transmit Data[2].
31
TXD1
I Transmit Data[1].
32
TXD0
I Transmit Data[0].
33
TXCLK
O Transmit Clock.
34
CRS/PHY[3]
I/O Carrier Sense/PHY Address[3]. This output pin indicates the carrier
sense condition. See Table 4 for PHY[3] description.
39
COL/PHY[4]
I/O Collision/False Carrier Sense. This output pin indicates collision
condition in normal MII operation and is squelch jabber in 10 Mbits/s
mode. See Table 4 for PHY[4] description.
35
MDIO
I/O Management Data I/O. Serial access to device config registers.
45
MDC
I Management Data Clock. Clock for R/W of device config registers.
16 MDIOINTZ/PHY[2] I/O MDIO Interrupt (Active-Low). The MDIO interrupt pin outputs a logic
0 pulse of 40 ns, synchronous to XIN, whenever an unmasked inter-
rupt condition is detected. Refer to management registers 1Dh and
1Eh for interrupt conditions. See Table 4 for PHY[2] description.
Note: Smaller font indicates that the pin has multiple functions.
6
Lucent Technologies Inc.