Download Application Bulletin 78

18
TYPICAL PEAK POWER COUPLED INTO A 1m LENGTH
OF FIBER-OPTIC CABLE
IF = 60 mA TA = 25°C
FIBER CABLE
NA
HFBR-14X2
HFBR-14X4
100/140 µm
0.3
-12.0
-6.5
62.5/125 µm
0.275
-16.0
-12.0
50/125 µm
0.20
-18.8
-15.8
NOTES:
1. ALL RESISTORS ARE ±5% TOLERANCE.
2. ALL ELECTROLYTIC CAPACITORS ARE ±20% TOLERANCE.
ALL OTHER CAPACITORS SHOULD BE RADIAL LEAD
MONOLITHIC CERAMIC TYPES WITH ±10% TOLERANCE.
+5 V Vcc
+
C3
10 µF
2, 6, 7
C2
0.1 µF
TTL
IN
9
10
74ACTQ00
1
2
3
U1
14
U1
8
HFBR-14X2/4
R1
33 Ω
R3
270 Ω
74ACTQ00
13
12
U1
11
C1
75 pF
74ACTQ00
5
4
U1
6
7
Figure 18b. 155 MBd Fiber-Optic Transmitter for TTL Interface.
●DATA RATE 155 MBd
3
R2
33 Ω
●FIBER LENGTH 500 m
●DATA PATTERN 2 23-1 PRBS
●TYPICAL PEAK-TO-PEAK JITTER = 760 ps
●FIBER TYPE SIECOR 62.5/125 µm ●TIME SCALE IS 2.0 ns/DIV.
Figure 19. ECL Output of the Transceiver Shown in Figures 17a and 17b.