VSC8601XKN Vitesse Semiconductor Corp, VSC8601XKN Datasheet - Page 19

• Manufacturer Part Number: VSC8601XKN
• Description: IC PHY 10/100/1000 64-EP-LQFP
• Manufacturer: Vitesse Semiconductor Corp
• Type: PHY Transceiverr

Specifications of VSC8601XKN

• Number Of Drivers/receivers: 1/1
• Protocol: Gigabit Ethernet
• Voltage - Supply: 2.5V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP Exposed Pad, 64-eLQFP, 64-HLQFP
• Case: TQFP
• Dc: 06+
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 907-1028

Figure 5.
3.4
Revision 4.1
September 2009
SimpliPHY
TXVN_C_n
TXVN_D_n
TXVN_A_n
TXVN_B_n
TXVP_C_n
TXVP_D_n
TXVP_A_n
TXVP_B_n
Cat5 Media Interface
Cat5 Auto-Negotiation
The VSC8601 device supports twisted pair auto-negotiation as defined by clause 28 of
the IEEE standard 802.3-2000.
The auto-negotiation process consists of the evaluation of the advertised capabilities of
the PHY and its link partner to determine the best possible operating mode, throughput
speed, duplex configuration, and master or slave operating modes in the case of
1000BASE-T setups. Auto-negotiation also allows a connected MAC to communicate
with its link partner MAC through the VSC8601 device using the optional “next pages,”
which set attributes that may not otherwise be defined by the IEEE standard.
In installations where the Cat5 link partner does not support auto-negotiation, the
VSC8601 automatically switches to use parallel detection to select the appropriate link
speed.
Clearing VSC8601 device register 0, bit 12 disables clause 28 twisted-pair
auto-negotiation. If auto-negotiation is disabled, the state of register bits 0.6, 0.13,
0.1 µF
0.1 µF
0.1 µF
0.1 µF
Transformer
Functional Descriptions
VSC8601 Datasheet
75
75
75
75
1
2
3
6
4
5
7
8
A+
A-
B+
B-
C+
C-
D+
D-
1000pF, 2kV
RJ-45
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