2

Functional Block Diagram

I/O Pins Configuration Table

Pin Symbol

Description

Notes

1

LED A

LED Anode

2

TXD

Transmitter Data Input. Logic High turns on the LED. If held high longer than ~ 50

µs, the LED is turned

Active High.

off. TXD must be either driven high or low. Do NOT float the pin.

3

RXD

Receiver Data Output.

Output is a low pulse response when a light pulse is seen.

Active Low.

4

SD

Shutdown.

Complete shutdown TXD, RXD, and PIN diode.

Active High.

Supply Voltage

Regulated, 2.7 to 5.5 volts.

6

GND

Ground

Connect to system ground.

–

SHIELD

EMI Shield

Connect to system ground via a low inductance trace. For best performance,

do not connect to GND directly at the part.

Pinout

Recommended Application Circuit Components

Component

Recommended Value

R1

2.2

2.7

6.8

0.47

µF ± 20%, X7R Ceramic

6.8

µF ± 20%, Tantalum

Caution: The BiCMOS inherent to the design of this component increases the component’s susceptibility to damage

from electrostatic discharge (ESD). It is advised that normal static precautions be taken during handling and

assembly of this component to prevent damage and/or degradation, which may be induced by ESD.

Notes:

1. CX1 must be placed within 0.7 cm of HSDL-3000 to obtain optimum noise immunity.

2. In environments with noisy power supplies, supply rejection can be enhanced by including

CX2 as shown in ”HSDL-3000 Functional Block Diagram“on page 2.

GND (6)

VCC (5)

LEDA (1)

R1

VCC

TRANSMITTER

HSDL-3xxx

CX1

TXD (2)

SHIELD

SD (4)

RXD (3)

CX2

65

4

3

2

1

REAR VIEW

Marking Information

The HSDL-3000#007/017 is

marked with a number “0” and

“YWWLL” on the shield where ‘Y’

indicates the unit’s manufacturing

year, ‘WW’ refers to the work week

and ‘LL’ is the lot information.