參數(shù)資料
型號(hào): NS32491
廠商: National Semiconductor Corporation
英文描述: Serial Network Interface
中文描述: 串行網(wǎng)絡(luò)接口
文件頁數(shù): 6/10頁
文件大?。?/td> 175K
代理商: NS32491
8.0 Switching Characteristics
V
CC
e
5V
g
5%, T
A
e
0
§
to 70
§
C (Note 2) (Continued)
Symbol
Parameter
Figure
Min
Typ
Max
Units
RECEIVE SPECIFICATION
t
RCd
t
RCr
t
RCf
t
RDr
t
RDf
t
RDs
t
CSon
t
CSoff
t
DAT
t
Drej
t
Rd
Receive Clock Duty Cycle at 50% (10 MHz)
12
40
50
60
%
Receive Clock Rise Time (20% to 80%)
12
8
ns
Receive Clock Fall Time (80% to 20%)
12
8
ns
Receive Data Rise Time (20% to 80%)
12
8
ns
Receive Data Fall Time (80% to 20%)
12
8
ns
Receive Data Stable from Receive Clock Rising Edge
7 & 12
g
40
ns
Carrier Sense Turn On Delay
7 & 12
50
ns
Carrier Sense Turn Off Delay
8, 9 & 12
160
ns
Decoder Acquisition Time
7
700
ns
Differential Inputs Rejection Pulse Width (Squelch)
7
8
30
ns
Receive Throughput Delay
8 & 12
150
ns
COLLISION SPECIFICATION
t
COLon
t
COLoff
Collision Turn On Delay
10 & 12
50
ns
Collision Turn Off Delay
10 & 12
350
ns
LOOPBACK SPECIFICATION
t
LBs
t
LBh
Note 2:
All typicals are given for V
CC
e
5V and T
A
e
25
§
C.
Loopback Setup Time
11
20
ns
Loopback Hold Time
11
0
ns
9.0 Timing and Load Diagrams
TL/F/6758–5
FIGURE 4. Transmit Timing - Start of Transmission
6
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