st20-gp1 STMicroelectronics, st20-gp1 Datasheet - Page 104

• Manufacturer Part Number: st20-gp1
• Description: Gps Processor
• Manufacturer: STMicroelectronics

ST20-GP1
19.2 Link timings
Notes
104/116
1
Symbol
t
t
t
t
t
C
C
This is the variation in the total delay through buffers, transmission lines, differential receiv-
ers etc., caused by such things as short term variation in supply voltages and differences in
delays for rising and falling edges.
JQr
JQf
JDr
JDf
JQJD
t
LIZ
LL
JB
LinkOut
Parameter
LinkOut rise time
LinkOut fall time
LinkIn rise time
LinkIn fall time
Buffered edge delay
Variation in t
LinkIn capacitance
LinkOut load capacitance
LinkIn
LinkOut
LinkIn
Earliest t
90%
10%
90%
10%
Latest t
JQJD
t
JQr
JQJD
JQJD
Figure 19.3 Buffered Link timings
t
JDr
Figure 19.2 Link timings
Table 19.2 Link timings
t
JB
@ f=1MHz
20 Mbits/s
10 Mbits/s
5 Mbits/s
1.5 V
1.5 V
Min
0
t
JQf
t
JDf
Nom
Max
20
10
20
20
10
30
10
50
3
Units
pF
pF
ns
ns
ns
ns
ns
ns
ns
ns
Notes
1
1
1