HFBR-0537 Avago Technologies US Inc., HFBR-0537 Datasheet - Page 5

• Manufacturer Part Number: HFBR-0537
• Description: Fiber Optics, Evaluation Kit
• Manufacturer: Avago Technologies US Inc.

Specifications of HFBR-0537

• Tool / Board Applications: Fiber Optic Transceivers
• Mcu Supported Families: HFBR-1527, HFBR-2526
• Development Tool Type: Hardware / Software - Eval/Demo Board
• Main Purpose: Interface, Fiber Optics
• Embedded: No
• Utilized Ic / Part: HFBR-1527, HFBR-2526
• Primary Attributes: DC ~ 32MBd TTL
• Secondary Attributes: TTL-Compatible
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 516-2146; HFBR-0537

Figure 3. TTL-compatible LEd Transmitter
Table 2
Simple TTL Compatible LED Transmitter
A high-performance, low-cost TTL-compatible trans-
mitter is shown in Figure 3. This transmitter recom-
mendation is deceptively simple, but has been highly
developed to deliver the best performance achievable
with Avago Technologies’ LED transmitters. The recom-
mended transmitter is also very inexpensive, because
the 74ACTQ00 gate used to current modulate the LED
can typically be obtained for under $0.40. No calcula-
tions are required to determine the passive component
needed when using various Avago Technologies’ LEDs
with a wide range of optical fibers. Simply use the
5
Transmitter
Fiber Type
R1
R2
R3
C3
TTL IN
SYSTEM POWER
HOST
+5 V
1 mm Plastic
12
13
390 W
120 W
120 W
74ACTQ00
82 pF
U1D
7 GND
#HF30ACB453215
HFBR-15X7Z
650 nm LED
11
TDK
L1
200 mm HCS
10
470 pF
270 W
5
4
2
9
1
33 W
33 W
74ACTQ00
V cc
74ACTQ00
U1B
U1A
14
74ACTQ00
U1C
3
6
8
HFBR-14X4Z
820 nm LED
62.5/125 mm
270 W
75 pF
33 W
33 W
recommended component values shown in Table 2,
and the transmitter shown in Figure 3 can be used to
address a broad range of applications.
Simple TTL Compatible Receiver
A very simple TTL-compatible receiver that has ad-
equate sensitivity for a wide range of applications is
shown in Figure 4. Equation 1 allows the designer to
quickly determine the values of C6 and C7 so that the
receiver is optimized for operation at any data rate up to
a maximum of 32 MBd.
R1
C3
C1
0.1 mF
R2
R3
HFBR-13X2TZ
1300 nm LED
C2
10 mF
62.5/125 mm
150 pF
22 W
27 W
∞
6
2
7
3
1
HFBR-14X4Z
1
4
4
2
3
U2B
HFBR-15X7Z
8
U2A
8
5
5