參數(shù)資料
型號: NS32490D
廠商: National Semiconductor Corporation
英文描述: NIC Network Interface Controller(NIC網(wǎng)絡接口控制器)
中文描述: NIC網(wǎng)絡接口控制器(NIC網(wǎng)絡接口控制器)
文件頁數(shù): 55/56頁
文件大小: 689K
代理商: NS32490D
AC Timing Test Conditions
Input Pulse Levels
Input Rise and Fall Times
Input and Output Reference Levels
TRI-STATE Reference Levels
Output Load (See Figure below)
GND to 3.0V
5 ns
1.3V
Float (
D
V)
g
0.5V
TL/F/8582–94
Note 1:
C
L
e
50 pF, includes scope and jig capacitance.
Note 2:
S1
e
Open for timing tests for push pull outputs.
S1
e
V
CC
for V
OL
test.
S1
e
GND for V
OH
test.
S1
e
V
CC
for High Impedance to active low and active low to High
Impedance measurements.
S1
e
GND for High Impedance to active high and active high to
High Impedance measurements.
Pin Capacitance
T
A
e
25
§
C, f
e
1 MHz
Parameter
Description
Typ
Max
Unit
C
IN
Input
Capacitance
7
15
pF
C
OUT
Output
Capacitance
7
15
pF
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
50 pf:
a
0.3 ns/pF (for all outputs except TXE, TXD,
and LBK)
55
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