dp83220 National Semiconductor Corporation, dp83220 Datasheet - Page 7

• Manufacturer Part Number: dp83220
• Description: Cdl Twisted Pair Fddi Transceiver Device
• Manufacturer: National Semiconductor Corporation

4 0 Electrical Characteristics
4 3 TRANSMIT DATA AND CURRENT DRIVER OUTPUT
TABLE I Media Select
Mode
SDDI
STP
DTP
FIGURE 8 Typical Pre-Emphasized Current Waveform I
k
l
MSEL
Float
1 5V
3 7V
TXDn
0
0
1
1
TXDn
(Continued)
0
1
0
1
b
1
(I
1
7
(I
(I
I
a
TXO
1
2
) I
) I
I
0
2
max
max
Note This table assumes that minimum signal’s levels required by Signal
Detect have been met
) I
a
max
LBEN
0
0
1
1
TABLE II Data Paths and Signal Detect
(I
1
(I
(I
a
I
TXO
2
1
) I
) I
CDET
0
I
2
max
max
) I
1
0
1
0
b
max
TXO
a
Data
PMRD
PMRD
TL F 11724 – 9
RXI
RXI
PMID
g
g
g
g
g
SD
0
1
1
1
a