3

Absolute Maximum Ratings

For implementations where case-to-ambient thermal resistance is

≤ 50°C/W.

Parameter

Symbol

Min.

Max.

Units

Storage Temperature

–40

100

°C

Operating Temperature

–25

85

°C

LED Supply Voltage

07

V

Supply Voltage

07

V

Input/Output Voltage

07

V

Input Voltage: TXD, SD

0

V

Output Voltage: RXD

–0.5

V

Solder Reflow

See page 12

Temperature Profile

Transceiver I/O Truth Table

The outputs (LED and RXD) are

controlled by the combination of

the TXD and SD (shutdown) pins

and light falling on the receiver.

As shown in the table below, the

transmitter is non-inverting; the

LED is on when the TXD pin is

high and off when TXD is low.

SD

TXD

LED

Receiver

RXD

Notes

Low

High

On

Don’t care

Not valid

2

Low

Off

IrDA signal

Low

3, 4

No signal

High

High

Don’t care

Off

Don’t care

High

5

Shutdown Mode Notes

When the HSDL-3202 is in Shut-

down Mode (SD pin high), the

part presents different imped-

ances to the rest of the circuit

than when it is in normal mode.

RXD Pin: This pin is NOT Tri-

state. During shutdown the

equivalent circuit is a weak

pullup (~300 k

Ground are also present.

TXD Pin: Input protection

diodes are present.

VLED Pin: Typical leakage

current of 1.5 nA.

SD Pin: Will draw approximately

10 nA when driven high.

Caution: The BiCMOS inherent to this design of this component increases the component’s suscep-

tibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions

be taken in handling and assembly of this component to prevent damage and/or degradation

which may be induced by ESD.

The receiver is inverting; the RXD

pin is low during IrDA signal

pulses and high when the receiver

does not see any light. When

shutdown (SD pin high), the LED

is off (the state of the TXD pin

does not matter), and the RXD

pin is pulled high with a weak

internal pullup.