DP8390 NSC [National Semiconductor], DP8390 Datasheet - Page 55

• Manufacturer Part Number: DP8390
• Description: NIC Network Interface Controller
• Manufacturer: NSC [National Semiconductor]

AC Timing Test Conditions
Note 1 C
Note 2 S1
Input Pulse Levels
Input Rise and Fall Times
Input and Output Reference Levels
TRI-STATE Reference Levels
Output Load (See Figure below)
S1
S1
S1
Impedance measurements
S1
High Impedance measurements
L
e
e
e
e
e
e
50 pF includes scope and jig capacitance
V
Open for timing tests for push pull outputs
V
GND for V
GND for High Impedance to active high and active high to
CC
CC
for High Impedance to active low and active low to High
for V
OL
OH
test
test
Float ( V)
GND to 3 0V
1 3V
5 ns
TL F 8582 – 94
g
0 5V
55
Pin Capacitance
Note This parameter is sampled and not 100% tested
DERATING FACTOR
Output timings are measured with a purely capacitave load
for 50 pF The following correction factor can be used for
other loads
C
L t
Parameter
C
C
IN
OUT
50 pf
and LBK)
a
0 3 ns pF (for all outputs except TXE TXD
Description
Input
Capacitance
Output
Capacitance
T
A
e
25 C f
Typ
7
7
e
Max
1 MHz
15
15
Unit
pF
pF