WG82574IT S LBAC Intel, WG82574IT S LBAC Datasheet - Page 487
WG82574IT S LBAC
Manufacturer Part Number
WG82574IT S LBAC
Description
CONTROLLER, ENET, INTEL 82574IT, 64PQFN
Manufacturer
Intel
Datasheet
1.WG82574IT_S_LBAC.pdf
(490 pages)
Specifications of WG82574IT S LBAC
Ethernet Type
IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supply Voltage Range
3V To 3.6V
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
QFN
No. Of Pins
64
Package / Case
QFN
Interface Type
I2C, JTAG, PCI, SPI
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Board Layout and Schematic Checklists—82574 GbE Controller
LED Circuits
Mfg Test
Section
Basic recommendation is a single green LED
for activity and a dual (bi-color) LED for
speed. Many other configurations are possible.
LEDs are configurable through the NVM.
Connect LEDs to 3.3 V dc as indicated in
reference schematics.
Add current limiting resistors to LED paths.
The 82574 allows a JTAG Test Access Port to
enable an XOR tree test.
Check Items
Two LED configurations are compatible with integrated
magnetic modules. For the Link/Activity LED, connect
the cathode to the LED1 pin and the anode to VCC. For
the bi-color speed LED pair, have the LED2 signal drive
one end. The other end should be connected to LED0.
When LED2 is low, the orange LED is lit. When LED0 is
low, the green LED is lit.
Use 3.3 V dc AUX for designs supporting wake-up.
Consider adding one or two filtering capacitors per LED
for extremely noisy situations. Suggested starting
value is 470 pF.
Typical current limiting resistors are 250 to 330
when using a 3.3 V dc supply. Current limiting resistors
are sometimes included with integrated magnetic
modules.
Because of pin sharing the 82574 cannot be used in a
JTAG chain. The JTAG pins must be individually driven
and sampled.
Remarks
487
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