ns32491 National Semiconductor Corporation, ns32491 Datasheet - Page 6

• Manufacturer Part Number: ns32491
• Description: Serial Network Interface
• Manufacturer: National Semiconductor Corporation

8 0 Switching Characteristics
Note 2 All typicals are given for V
9 0 Timing and Load Diagrams
Symbol
RECEIVE SPECIFICATION
t
t
t
t
t
t
t
t
t
t
t
COLLISION SPECIFICATION
t
t
LOOPBACK SPECIFICATION
t
t
RCd
RCr
RCf
RDr
RDf
RDs
CSon
CSoff
DAT
Drej
Rd
COLon
COLoff
LBs
LBh
Receive Clock Duty Cycle at 50% (10 MHz)
Receive Clock Rise Time (20% to 80%)
Receive Clock Fall Time (80% to 20%)
Receive Data Rise Time (20% to 80%)
Receive Data Fall Time (80% to 20%)
Receive Data Stable from Receive Clock Rising Edge
Carrier Sense Turn On Delay
Carrier Sense Turn Off Delay
Decoder Acquisition Time
Differential Inputs Rejection Pulse Width (Squelch)
Receive Throughput Delay
Collision Turn On Delay
Collision Turn Off Delay
Loopback Setup Time
Loopback Hold Time
CC
e
5V and T
Parameter
FIGURE 4 Transmit Timing - Start of Transmission
A
e
25 C
V
CC
e
5V
g
5% T
6
A
e
0 to 70 C (Note 2) (Continued)
8 9
10
10
Figure
7
7
8
12
12
12
12
12
11
11
7
7
12
12
12
12
12
12
g
Min
40
20
8
0
40
Typ
50
Max
160
700
150
350
60
50
30
50
8
8
8
8
TL F 6758 – 5
Units
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns