HSDL-3003-021 查看數據表（PDF） - Avago Technologies

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HSDL-3003-021

IrDA® Data Compliant Low Power 115.2 kbit/s with Remote Control Infrared Transceiver

Avago Technologies 

I/O Pins Configuration Table

Pin Symbol I/O Description

Notes

1 LEDA

I IR and Remote

Control LED Driver

Tied through external resistor, R1, to VLED from 2.4 to 4.5 Volt

2 N.C.

– No Connection

No Connection

3 TxD_IrDA I IrDA Transmitter Data Logic high turns on the IrDA LED. If held HIGH longer than

Input. Active High

~50 µs, the IrDA LED is turned off. TxD_IrDA must be driven either

HIGH or LOW. Do not leave the pin floating

4 RxD_IrDA O IrDA Receiver Data

Output. Active Low

Output is at LOW pulse response when light pulse is seen

5 SD

I Shutdown. Active High Complete shutdown TxD_IrDA, RxD_IrDA, and PIN diode. Do not

leave the pin floating

6 VCC

I Supply Voltage

Regulated, 2.4 to 3.6 Volt

7 TxD_RC I Remote Control

Transmission Input.

Active High

Logic high turns on the RC LED. If held HIGH longer than ~50 µs,

the RC LED is turned off. TxD_RC must be driven either HIGH or

LOW. Do not leave the pin floating

8 GND

I Connect to System

Ground

Tie this pin to system ground

– Shield – EMI Shield

Tie to system ground via a low inductance trace. For best

performance, do not tie it to the HSDL-3003 GND pin directly

Recommended Application Circuit Components

Component

R1

CX1[1]

CX2[2]

CX3

Recommended Value

1.8 Ω ± 5%, 0.25 Watt for 2.4 ≤ VLED ≤ 2.7 V

2.7 Ω ± 5%, 0.25 Watt for 2.7 ≤ VLED ≤ 3.3 V

3.3 Ω ± 5%, 0.25 Watt for 3.0 ≤ VLED ≤ 3.6 V

4.7 Ω ± 5%, 0.25 Watt for 3.6 ≤ VLED ≤ 4.5 V

0.47 µF ± 20%, X7R Ceramic

6.8 µF ± 20%, Tantalum

6.8 µF ± 20%, Tantalum

Notes:

1. CX1 must be placed within 0.7 cm of HSDL-3003 to obtain optimum noise immunity.

2. The supply rejection performance can be enhanced by including CX2, as shown in Figure 1, in

environment with noisy power supplies.

3

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