168

Plastic and Hard Clad Silica Optical Fiber Receiver Application Circuit:

°C unless

otherwise stated.

Parameter

Symbol

Typical

Unit

Condition

Note

Data Output Voltage - Low

V

Note 5

Data Output Voltage - High

V

Note 5

Receiver Sensitivity to Average

-27.5

dBm

50% eye opening

Note 2

Modulated Optical Power 1 mm POF

Receiver Sensitivity to Average

-28.5

dBm

50% eye opening

Note 2

Modulated Optical Power 200

µm HCS

Receiver Overdrive Level of Average

-7.5

dBm

50% eye opening

Note 2

Modulated Optical Power 1 mm POF

Receiver Overdrive Level of Average

-10.5

dBm

50% eye opening

Note 2

Modulated Optical Power 200

µm HCS

Receiver Application Circuit Current

85

mA

Figure 1

Consumption

Notes:

4. Performance in response to a signal from the transmitter driven with the recommended circuit at 1-125 MBd over 1 meter of plastic

5. Terminated through a 50

Ω resistor to V

6. If there is no input optical power to the receiver, electrical noise can result in false triggering of the receiver. In typical applications,

data encoding and error detection prevent random triggering from being interpreted as valid data.

Figure 1. Transmitter and Receiver Application Circuit with +5 V ECL Inputs and Outputs.

C1

0.001

C2

0.1

R5

22

Q1

MPS536L

R6

91

R7

91

Q2

MPS536L

C20

10

C19

0.1

9

8

7

6

5

4

3

2

1

J1

Q2 BASE

Q1 BASE

PIN 19 10H116

PIN 18 10H116

NC

L1

CB70-1812

1

2

3

4

5

13

12

10

9

14

7

8

11

6

2

3

4

12

13

5

7

8

9

3

4

17

15

19

18

R24

1K

R22

1K

R18

51

R16

51

C17

0.1

C10

0.1

R19

51

R17

51

R15

1K

R23

1K

C18

0.1

R25

1K

R20

12

R21

62

3 V

C14

10

TL431

U5

MC10H116FN

C15

0.1

C11

0.1

C16

0.1

C12

0.1

R14

1K

3V

C9

47

R12

4.7

C13

0.1

R13

4.7

U4C

U4A

U4B

R11*

R10

15

C8*

74ACTQ00

U1B

74ACTQ00

U1D

74ACTQ00

U1C

R9*

R8*

C7

0.001

C6

0.1

C5

10

C4

0.001

C3

0.1

Q3

2N3904

74ACTQ00

U1A

POF

180

180

820

62 pF

R8

R9

R11

C8

HCS

82

82

470

120 pF

TOLERANCE

1%

1%

1%

5%

THE VALUES OF R8, R9, R11, AND

C8 ARE DIFFERENT FOR POF AND

HCS DRIVE CIRCUITS.

UNLESS OTHERWISE NOTED,

ALL CAPACITOR VALUES

ARE IN µF WITH ± 10%

TOLERANCE AND ALL

RESISTOR VALUES ARE IN

Ω WITH ± 5% TOLERANCE.

MC10H116FN

MC10H116FN

2

20

+

+

+

10

14

RX GND

5

8

7

6

9

10

U22

RX GND

RX GND

GND

GND

ANODE

CATHODE

RX OUT

1