KSZ8041TL Micrel Inc, KSZ8041TL Datasheet - Page 38

• Manufacturer Part Number: KSZ8041TL
• Description: TRANSCEIVER 10/100BASE 48-TQFP
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of KSZ8041TL

• Package / Case: 48-TQFP, 48-VQFP
• Number Of Drivers/receivers: 1/1
• Protocol: MII, RMII
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Supply Voltage Range: 3.3V
• Logic Case Style: TQFP
• No. Of Pins: 48
• Svhc: No SVHC (15-Dec-2010)
• Base Number: 804
• Supply Voltage Max: 3.3V
• Termination Type: SMD
• Development Tool: RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-3295 - BOARD EVALUATION KSZ8041TL
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-1619

Micrel, Inc.
Back-to-Back Media Converter
A KSZ8041TL/MLL and a KSZ8041FTL can be connected back-to-back to provide a low cost media converter solution. In
back-to-back mode, media conversion is between 100Base-TX copper and 100Base-FX fiber. On the copper side, link up
at 10Base-T is not allowed, and is blocked during auto-negotiation.
MII Back-to-Back Mode
In MII Back-to-Back mode, the KSZ8041TL/MLL interfaces with another KSZ8041TL/MLL, or a KSZ8041FTL to provide a
complete 100Mbps repeater or media converter solution. The KSZ8041TL/FTL/MLL devices are configured to MII Back-to-
Back mode after they are power-up or reset with the following:
December 2009
x
x
x
CONFIGURATION[2:0] (pins 27, 41, 40) set to ‘110’
A common 25MHz reference clock connected to XI (pin 15)
MII signals connected as shown in the following table.
Pin Name
RXDV
RXD3
RXD2
RXD1
RXD0
TXEN
TXD3
TXD2
TXD1
TXD0
RXC
TXC
KSZ8041MLL (100Base-TX copper)
KSZ8041TL (100Base-TX copper)
Figure 10. KSZ8041TL/MLL and KSZ8041FTL Back-to-Back Media Converter
Pin Number
Table 12. MII Signal Connection for MII Back-to-Back Mode
28
27
20
21
22
23
33
34
39
38
36
35
Pin Type
Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
38
Pin Name
RXDV
TXEN
TXD3
TXD2
TXD1
TXD0
RXD3
RXD2
RXD1
RXD0
RXC
TXC
KSZ8041MLL (100Base-TX copper)
KSZ8041TL (100Base-TX copper)
KSZ8041FTL (100Base-FX fiber)
Pin Number
33
34
39
38
36
35
28
27
20
21
22
23
Pin Type
Output
Output
Output
Output
Output
Output
KSZ8041TL/FTL/MLL
Input
Input
Input
Input
Input
Input
M9999-120909-1.2