ELECTRONIC COMPONENTS

SHARP IrDA Control Infrared Transceiver

SHARP Electronic Components

6

Rev. 1.1.1 November 26, ‘98

5. Recommended Operating Conditions

Parameter

Symbol

Min.

Max.

Units

Conditions

Operating Temperature

-10

70

Supply Voltage

2.7

5.5

V

Supply voltage for receiver side

Supply Voltage

4.25

5.25

V

Supply voltage for emitter side

Transmitter Input Subcarrier

Frequency

fsc

1.484

1.517

MHz

range of + 1.1%

Logic High Transmitter

Input Voltage (TXD)

2.7

-

V

Logic Low Transmitter

Input Voltage (TXD)

0.0

0.3

V

Logic High Receiver Input

0.4

1250

*5

For in-band signals < 75.83kb/s

Irradiance

1.111

1250

*5

For in-band signals < 75.83kb/s

LED (Logic High) Current

Pulse Amplitude

400

-

mA

*4

Receiver Signal Rate

74.175

75.825

kb/s

Receiver RESET Input Voltage

Vrs_th

0.7

2.0

V

Refer to

´RESET Functionµ

SD Recovery Time

-1

msec

[NOTES]:

3.

IrDA Control system uses 16PSM coding scheme over 1.5MHz sub-carrier. See IrDA Control Physical Layer

Link Specification for the details of coding scheme and pulse characteristics.

4.

See Figure 5.1 (below) for the viewing angle definition.

5.

An in-band optical signal is a pulse/sequence where the peak wavelength

λp, is defined as 850nm < λp < 900nm,

and the pulse characteristics are compliant with the IrDA Control Physical Layer Link Specification.

(

): TENTATIVE Value

Receiver

Transmitter

Θr, Φr

Θt, Φt

Θ

Φ

Figure 5.1 IrDA Control Transceiver Viewing Angle Criteria