Datasheet

SCEA017
7–293
GTLP in BTL Applications
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0.33 V/ns
0.45 V/ns
0.48 V/ns
0.28 V/ns
0.5 V/ns
0.33 V/ns
Duty Cycle 45–55%
Duty Cycle 46–54%
Duty Cycle 48–52%
1.5 V
10 ns
10 ns
25 ns
V
REF
V
TT
V
REF
V
TT
V
REF
V
TT
1.5 V
V
TT
R
TT
43.5 MHz
11.5 MHz
25 MHz
R
TT
= 25
R
TT
= 33
R
TT
= 38
R
TT
= 50
R
TT
= 33
R
TT
= 50
R
TT
= 38
R
TT
= 25
R
TT
= 25
R
TT
= 50
R
TT
= 33
R
TT
= 38
V
OL
= 0.30 V at 25
V
OL
= 0.25 V at 33
V
OL
= 0.20 V at 38
V
OL
= 0.15 V at 50
Fully Loaded Backplane (Driver in Slot 1, Receiver in Slot 2)
SN74GTLPH1655DGGR With Edge-Rate Control in Slow
Figure 8. GTLPH1655 Waveforms at GTLP Signal Levels (Group 1, Bit 1)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0.47 V/ns
0.52 V/ns
0.58 V/ns
0.43 V/ns
0.46 V/ns
0.40 V/ns
Duty Cycle 46–54%
Duty Cycle 46–54%
Duty Cycle 49–51%
2.1 V
10 ns
10 ns
25 ns
1.7 V
2.1 V
V
TT
R
TT
V
OL
= 0.45 V at 25
V
OL
= 0.36 V at 33
V
OL
= 0.29 V at 38
V
OL
= 0.20 V at 50
Fully Loaded Backplane (Driver in Slot 1, Receiver in Slot 2)
SN74GTLPH1655DGGR With Edge-Rate Control in Slow
V
REF
V
TT
V
REF
V
TT
V
REF
V
TT
R
TT
= 25
R
TT
= 33
R
TT
= 38
R
TT
= 50
43.5 MHz
11.5 MHz
25 MHz
R
TT
= 33
R
TT
= 50
R
TT
= 38
R
TT
= 25
R
TT
= 25
R
TT
= 50
R
TT
= 33
R
TT
= 38
Figure 9. GTLPH1655 Waveforms at BTL Signal Levels (Group 1, Bit 1)