82546EB Datasheet, PDF (27/47 Pages) Intel Corporation – Dual Port Gigabit Ethernet Controller

Networking Silicon — 82546EB
4.4
a. Typical conditions: operating temperature (TA) = 25 C, nominal voltages, moderate network traffic at full duplex, and PCI 66 MHz
system interface.
b. Maximum conditions: minimum operating temperature (TA) values, maximum voltage values, continuous network traffic at full du-
plex, and PCI-X 100 to 133 MHZ system interface.
AC Characteristics
Table 5. AC Characteristics: 3.3 V Interfacing
Symbol
Parameter
Min
Typ
Max
Unit
fPCICLK
Clock frequency in PCI mode
fPCICLK
Clock frequency in PCI-X mode
66
66
MHz
133
MHz
Table 6. 25 MHz Clock Input Requirements
Symbol
Parameter^a
Min
Typ
Max
Unit
fi_TX_CLK
TX_CLK_IN frequency
25 - 50 ppm
25
25 + 50
ppm
MHz
a. This parameter applies to an oscillator connected to the Crystal One (XTAL1) input. Alternatively, a crystal may be connected
to XTAL1 and XTAL2 as the frequency source for the internal oscillator.
Table 7. Link Interface Clock Requirements
Symbol
fGTX^a
Parameter
GTX_CLK frequency
a. GTX_CLK is used externally for test purposes only.
Min
Typ
Max
Unit
125
MHz
Table 8. EEPROM Interface Clock Requirements
Symbol
fSK
Parameter
Min
Typ
Max
Unit
1
MHz
Table 9. AC Test Loads for General Output Pins
Symbol
CL
CL
CL
CL
Signal Name
TDO
APM_WAKEUP, PME#, SDP[7:0]
EE_DI, EE_SK, FL_ADDR[18:0], FL_CS#, FL_OE#,
FL_WE#, FL_DATA[7:0]
RX_ACTIVITY, TX_ACTIVITY, LINK_UP
Value
10
16
18
20
Units
pF
pF
pF
pF
Datasheet
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