lxt9785 Intel Corporation, lxt9785 Datasheet - Page 173

• Manufacturer Part Number: lxt9785
• Description: Advanced 8-port 10/100 Mbps Phy Transceivers
• Manufacturer: Intel Corporation

Datasheet
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003
Table 54. Intel
Table 55. Intel
Table 56. Intel
5%)
Input Low voltage
Input High voltage
Input current
Output Low voltage
Output Low voltage (LEDm_n pins)
Output High voltage
Input Low voltage
Input High voltage
Input Low voltage
Input High voltage
SMII Input frequency
RMII Input frequency
Input clock frequency tolerance
Input clock duty cycle
Input clock duty cycle - REFCLK,
TxCLK
Output RxCLK duty cycle
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
2. For 2.5 V operation, SD_2P5V = VCCPECL and VCCPECL=2.5 V.
3. For 3.3 V operation, SD_2P5V = GNDPECL or Floating and VCCPECL=3.3 V.
1. Parameter is guaranteed by design; not subject to production testing.
2. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
testing.
testing.
testing.
®
®
®
LXT9785/LXT9785E Digital I/O DC Electrical Characteristics (VCCIO = 3.3 V +/-
1
LXT9785/LXT9785E Digital I/O DC Electrical Characteristics – SD Pins
LXT9785/LXT9785E Required Clock Characteristics
Parameter
Parameter
Parameter
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
1
1
Sym
V
V
V
V
IH
IH
Sym
IL
IL
Tdc
Tdc
Tdc
V
'f
f
f
OL
Sym
V
V
V
V
I
-LED
OH
OL
IL
IH
I
0.69
1.34
1.49
2.14
Min
2.5 V Operation
3.3 V Operation
Min
35
40
45
–
–
–
-100
Min
2.0
2.4
–
–
–
Typ
Typ
125
0.8
1.6
1.6
2.4
50
50
50
50
–
1
2
Typ
–
–
–
–
–
–
1
Max
± 50
Max
1.03
1.62
1.83
2.42
65
60
55
–
–
Max
100
0.8
0.2
0.5
–
–
Units
Units
MHz
MHz
ppm
%
%
%
V
V
V
V
Units
PA
V
V
V
V
V
SMII/SS-SMII selection
VCCPECL = 2.5 V
VCCPECL = 2.5 V
VCCPECL = 3.3 V
VCCPECL = 3.3 V
Test Conditions
Test Conditions
RMII selection
SS-SMII only
Test Conditions
0.0 < V
I
I
I
OL
OH
OL
–
–
–
= 10 mA
= 4 mA
= -4 mA
–
–
I
< V
CC
175