82544EI Datasheet, PDF (25/52 Pages) Intel Corporation – Gigabit Ethernet Controller

82544EI Gigabit Ethernet Controller Networking Silicon Datasheet
4.4
Targeted AC Characteristics
Table 6. AC Characteristics: 3.3 V Interfacing
Symbol
Parameter
f_PCICLK
CLK frequency in PCI mode
CLK frequency in PCI-X mode
Min
Typ
Max Units
66 MHz
66
133
Table 7. Switching Current
Symbol
Parameter
Condition
Min
Typ
Max
Units
I_OH(min)
I_OH(max)
I_OL(min)
I_OL(max)
Switching current high
Switching current high
Switching current low
Switching current low
V_OUT = 0.3V_CC(3.3)
V_OUT = 0.7V_CC(3.3)
V_OUT = 0.6V_CC(3.3)
V_OUT = 0.18V_CC(3.3)
TBD
TBD
mA
TBD
mA
mA
TBD
mA
Table 8. 25Mhz Clock Input Requirements
Symbol
Parameter^a
Min
Typ
Max
Units
f_{i_TX_CLK}
TX_CLK_IN Frequency
25 – 50 ppm 25
25 + 50 ppm
MHz
a. This parameter applies to an oscillator connected to the XTAL1 input. Alternatively, a crystal may be connected to XTAL1
and XTAL 2 as the frequency source for the internal oscillator.
Table 9. Link Interface Clock Requirements
Symbol
f_GTX^a
Parameter
GTX_CLK Frequency
GMII Mode (1000 Mb/s)
Min
Typ
125
a. GTX_CLK is used externally only for test purposes.
Max
Table 10. EEPROM Interface Clock Requirements
Symbol
f_SK
Parameter
O_EE_SK Frequency
Min
Typ
Max
1
Units
MHz
Units
MHz
Datasheet
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