dp83251 National Semiconductor Corporation, dp83251 Datasheet - Page 79

• Manufacturer Part Number: dp83251
• Description: Player Device Fddi Physical Layer Controller
• Manufacturer: National Semiconductor Corporation

7 0 Electrical Characteristics
DC electrical characteristics for all Open Drain output signals (INT ACK and CR)
DC electrical characteristics for all 100k ECL input and output signals
Supply Current electrical characteristics
resistors and the maximum current consumed by the PLAYER device alone is only 380 mA The ECL termination current is calculated as follows
Since the outputs are differential the average output level is V
through the 50X resistor is
As result two pairs of ECL outputs consume 60 mA
Symbol
V
V
V
V
I
I
Note The PLAYER device has two pairs of differential ECL outputs therefore 60 mA of the total supply current is actually consumed by external termination
L
H
V
I
OH
OL
IH
IL
Symbol
Symbol
I
OZ
CC
OL
V
V
I
LOAD
OH max
OL max
e
e
e
15 mA
0 015A
e
(V
e
CC
Output High Voltage
Output Low Voltage
Input High Voltage
Input Low Voltage
Input Low Current
Input High Current
V
V
CC
CC
b
b
b
Output Low Voltage
TRI-STATE Leakage
Parameter
1 25)
Total Supply
Current
Parameter
1 62V
0 88V
Parameter
b
(V
CC
b
2) 50
V
V
V
V
LBC
TXC
IN
IN
IN
IN
Conditions
Conditions
e
e
e
e
(Continued)
e
e
CC
V
V
GND
V
I
V
IH
IL
CC
OL
Conditions
12 5 MHz
125 MHz
OUT
b
(min)
(max)
e
1 25V The test load per output is 50X at V
e
8 mA
V
79
CC
V
V
V
V
CC
CC
CC
CC
Min
b
b
b
b
Min
Min
1 025
1 810
1 165
1 810
Typ
Typ
Typ
CC
b
2V therefore the external load current
V
V
V
V
CC
CC
CC
CC
440
Max
Max
b
Max
100
b
b
b
b
0 5
10
10
0 880
1 620
0 880
1 475
Units
Units
mA
mA
Units
V
mA
mA
V
V
V
V