9

8

7

6

5

1

4

HFBR-1505CZ

5

6

7

8

4

1

HFBR-2505CZ

C4

0.1 µF

+5 V VCC

0 V

TTL OUTPUT

8

2

1

3

4

+5 V VCC

0 V

TTL INPUT

R1

C1

10 µF

C2

0.1 µF

U1

DS75451

TTL COMPATIBLE TRANSMITTER

TTL COMPATIBLE RECEIVER

R1

IF

82.5

Ω

35 mA

47

Ω

60 mA

+

IF

VF

Receiver Electrical/Optical Characteristics

0

°C to 70°C, 4.75 V ≤ V

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

Ref.

Input Optical Power Level

–21.6

–2.0

dBm

Notes 1, 2

for Logic “0”

1 mm POF

–23.0

200

µm HCS

Input Optical Power Level

–43

dBm

Note 1

for Logic “1”

High Level Output Current

5

250

µAV

Note 3

Low Level Output Current

0.4

0.5

V

Note 3

High Level Supply Current

3.5

6.3

mA

Note 3

Low Level Supply Current

6.2

10

mA

Note 3

Effective Diameter

D

1

mm

Numerical Aperture

NA

0.5

Internal Pull-up Resistor

680

1000

1700

Ω

Notes:

1. Optical flux, P (dBm) = 10 Log [P (

µW)/1000 µW].

2. Measured at the end of the fiber optic cable with large area detector.

Figure 11. Typical interface circuit