LAN8187I-JT Standard Microsystems (SMSC), LAN8187I-JT Datasheet - Page 11

• Manufacturer Part Number: LAN8187I-JT
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN8187I-JT

• Number Of Receivers: 1
• Data Rate: 10/100Mbps
• Operating Supply Voltage (typ): 3.3V
• Package Type: TQFP
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Mounting: Surface Mount
• Pin Count: 64
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Compliant

±15kV ESD Protected MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX & flexPWR
Datasheet
Chapter 3 Pin Description
SMSC LAN8187/LAN8187i
3.1
SIGNAL NAME
This chapter describes the signals on each pin. When a lower case “n” is used at the beginning of the
signal name, it indicates that the signal is active low. For example, nRST indicates that the reset signal
is active low.
I
O
I/O
Note: The digital signals are not 5V tolerant. They are variable voltage from +1.6V to +3.6V.
AI
AO
I/O Signals
TX_CLK
TX_ER/
TX_EN
TXD0
TXD1
TXD2
TXD3
TXD4
nINT/
Input. Digital LVCMOS levels.
Output. Digital LVCMOS levels.
Input or Output. Digital LVCMOS levels.
Input. Analog levels.
Output. Analog levels.
TYPE
I/O
O
I
I
I
I
I
Table 3.1 MII Signals
DATASHEET
Transmit Data 0: Bit 0 of the 4 data bits that are accepted by
the PHY for transmission.
Transmit Data 1: Bit 1 of the 4 data bits that are accepted by
the PHY for transmission.
Transmit Data 2: Bit 2 of the 4 data bits that are accepted by
the PHY for transmission
Note:
Transmit Data 3: Bit 3 of the 4 data bits that are accepted by
the PHY for transmission.
Note:
MII Transmit Error: When driven high, the 4B/5B encode
process substitutes the Transmit Error code-group (/H/) for the
encoded data word. This input is ignored in 10Base-T operation.
MII Transmit Data 4: In Symbol Interface (5B Decoding) mode,
this signal becomes the MII Transmit Data 4 line, the MSB of the
5-bit symbol code-group.
Notes:
Transmit Enable: Indicates that valid data is presented on the
TXD[3:0] signals, for transmission. In RMII Mode, only TXD[1:0]
have valid data.
Transmit Clock: 25MHz in 100Base-TX mode. 2.5MHz in
10Base-T mode.
Note:
This signal is not used in RMII Mode.
This signal is mux’d with nINT
See
page 31
options.
Section 4.10, "(TX_ER/TXD4)/nINT Strapping," on
11
This signal should be grounded in RMII Mode.
This signal should be grounded in RMII Mode
This signal is not used in RMII Mode
®
for additional information on configuration/strapping
Technology
DESCRIPTION
Revision 1.6 (02-27-09)