General Descriptions of IrDA1.0 System

Transmission rate : 2.4k to 115.2kbps

Modulation system : SIR

Receiving distance : 1 m

Transmitting wavelength : 850 to 900 nm

Receiving waveform : As shown in the right drawing

Output waveform : As shown in the right drawing

100

025

50

75

0

-25

Ambient temperature Ta (˚C)

500

400

300

200

100

70

Fig. 1 Peak Forward Current vs. Ambient

Temperature

Infrared Communication Terminal System Configuration Using GL1F20/IS1U20

-10

Pulse width 78.1

µ s

Duty ratio= 3/16

Please refer to the chapter "Precautions for Use". (Page 78 to 93)

Receiving waveform

Output waveform

(3/16) T

0

1

0

1

TT

T =8.6 to 417

µ s

Light emitting device for

infrared communication

(GL1F20)

Light emitting device for

infrared communication

(GL1F20)

OPIC detecting device for

infrared communication

(IS1U20)

OPIC detecting device for

infrared communication

(IS1U20)

Comparator

Amp

Amp

OA equipment body such as portable information terminal equipment

OA equipment body such as portable information terminal equipment

Comparator

GL1F20

s

s

q