ELECTRONIC COMPONENTS

SHARP IrDA Control Infrared Transceiver

SHARP Electronic Components

6

Rev. 1.0.1, November 26, ‘98

5. Recommended Operating Conditions

Parameter

Symbol

Min.

Max.

Units

Conditions

Operating Temperature

T

OP

-10

70

Supply Voltage

V

CC1

2.7

5.5

V

Supply voltage for receiver side

Supply Voltage

V

CC2

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)

V

IH (TXD)

2.7

-

V

Logic Low Transmitter

Input Voltage (TXD)

V

IL (TXD)

0.0

0.3

V

Logic High Receiver Input

Irradiance

EI

IL

3.0

1250

*5

For in-band signals < 75.83kb/s

LED (Logic High) Current

Pulse Amplitude

I

LEDA

400

-

mA

I

*4

Receiver Signal Rate

D

RATE

74.175

75.825

kb/s

High Level Input Voltage

(RESET Terminal)

V

IHRE

2.1

Vcc

V

Refer to

´RESET Functionµ

Low Level Input Voltage

(RESET Terminal)

V

ILRE

0

0.6

V

Refer to

´RESET Functionµ

Recovery Time

tret

-

40

µsec

SD Recovery Time

t

SD

-1

msec

High Level Input Voltage

(SD Terminal)

V

IHSD

2.2

Vcc

V

Low Level Input Voltage

(SD Terminal)

V

ILSD

0

0.5

V

Input Current

(TX Terminal)

I

TX

2.3

2.6

mA

V

[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