SMSC LAN9420i Manual De Usuario
Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
SMSC LAN9420/LAN9420i
159
Revision 1.22 (09-25-08)
DATASHEET
5.4
DC Specifications
Note 5.6
This specification applies to all IS type inputs and tri-stated bi-directional non-PCI pins. Internal pull-
down and pull-up resistors add +/- 50
down and pull-up resistors add +/- 50
μ
A per-pin (typical)
Note 5.7
This buffer type adheres to Section 4.2.2 (3.3V Signaling Environment) of the PCI Local Bus
Specification Revision 3.0
Specification Revision 3.0
. Device signals are NOT 5V tolerant. This device must not be used in
a 5V PCI system, or connected to 5V logic without appropriate voltage level translation.
Note 5.8
This specification applies to all IPCI type inputs and tri-stated bi-directional PCI pins.
Note 5.9
XI can optionally be driven from a 25MHz single-ended clock oscillator.
Table 5.6 I/O Buffer Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
IS Type Input Buffer
Low Input Level
High Input Level
Negative-Going Threshold
Positive-Going Threshold
SchmittTrigger Hysteresis
(V
(V
IHT
- V
ILT
)
Input Leakage
Input Capacitance
V
ILI
V
IHI
V
ILT
V
IHT
V
HYS
I
IN
C
IN
-0.3
1.01
1.39
345
-10
1.18
1.6
420
3.6
1.35
1.8
485
10
3
V
V
V
V
mV
uA
pF
Schmitt trigger
Schmitt trigger
IPCI Type Input Buffer
Low Input Level
High Input Level
Input Leakage
Input Capacitance
V
ILI
V
IHI
I
IN
C
IN
-0.5
1.5
-10
1.08
4.1
10
3
V
V
uA
pF
OPCI Type Buffer
Low Output Level
(I
(I
OUT
=500uA)
High Output Level
(I
(I
OUT
=-500uA)
V
OL
V
OH
2.7
0.3
V
V
O8 Type Buffers
Low Output Level
High Output Level
V
OL
V
OH
VDD33IO - 0.4
0.4
V
V
I
OL
= 8mA
I
OH
= -8mA
O12 Type Buffers
Low Output Level
High Output Level
V
OL
V
OH
VDD33IO - 0.4
0.4
V
V
I
OL
= 12mA
I
OH
= -12mA
OD12 Type Buffer
Low Output Level
V
OL
0.4
V
I
OL
= 12mA
ICLK Type Buffer (XI Input)
Low Input Level
High Input Level
V
ILI
V
IHI
-0.3
1.4
0.5
3.6
V
V