TEMIC TFDS3000 Datasheet

TFDS3000

Integrated Infrared Transceiver Module IrDA (SIR)

Description

The TFDS3000 is an infrared transceiver for data commu­nication systems. The transceiver is compatible to the
IrDA standard which allows data rates up to 115 kB/s.

Features

D

Compatible to IrDA standard

D

SMD side view

D

Low profile (height = 5.6 mm max.)

D

Microcomputer compatible

An internal AGC (Automatic Gain Control) ensures
proper operation under EMI conditions.

D

No external components

D

Low power consumption

D

Wide supply voltage range (3 to 5.5 V)

D

AGC for EMI immunity

Pin description:
1: IRED cathode

2: Rxd (output)
3: V
4: Ground
5: NC
6: **)
7: Txd (input)
8: IRED anode
Guide pins internally connected to ground

(supply voltage)

CC

*)

SD

Txd

*) optional sensitivity control for OEMs only
**) shut-down, not for new development

V

cc

3

Driver

ComparatorAmplifier

6

7

Control

logic

Driver

4

GND

Figure 1. Block diagram

95 11227

2

Rxd

8

1

TELEFUNKEN Semiconductors

Rev . A6, 15-Aug-96

1 (10)

Preliminary Information

TFDS3000

Absolute Maximum Ratings

Reference point Pin 4, unless otherwise specified

Parameter Test Conditions Symbol Value Unit

Supply voltage range V

CC

Input currents All pins, exept 8:see IRED 10 mA
Output sinking current 25 mA
Power dissipation See figure 3 P
Junction temperature T
Ambient temperature range

T

tot

j

amb

(operating)
Storage temperature range T

stg

Soldering temperature See figure 11 introductory text

IrDA Design Guide
Average IRED current I
Repetitive pulsed IRED current < 90 ms, ton < 20% I
Peak IRED current < 2 ms, ton < 10% I
IRED anode voltage V
Transmitter data input voltage V
Receiver data output voltage V

(DC) 100 mA

IRED

(RP) 500 mA

IRED

(PK) 1 A

IRED

IREDA

Txd
Rxd

–0.5 to 6 V

200 mW
125 °C

0 to70 °C

–25 to +85 °C

230 (typ. 215)

–0.5 to V
–0.5 to V
–0.5 to V

+0.5 V

CC

+0.5 V

CC

+0.5 V

CC

_

C

Basic Characteristics

T

= 25_C, VCC = 5 V, unless otherwise specified

amb

Parameter Test Conditions Symbol Min. Typ. Max. Unit

T ransceiver

Supported data rates 2.4 115.2 kBit/s
Supply voltage range

reduced function down
to 2.6 V

Supply current I

Receiver

Min. detection threshold
irradiance

**)

Max. detection threshold
irradiance

**)

a

= "15° E

a

= "90° E

Logic low receiver input
irradiance

Max. DC irradiance

a

= "90° E

Output voltage Rxd Active,

C = 15 pF, R = 2.2 k

W

Output voltage Rxd Non-active,

C = 15 pF, R = 2.2 k

W

Output current VOL < 0.5 V

C = 15 pF, R = 2.2 k
Rise and fall time C = 15 pF, R = 2.2 k
Rxd signal, electrical

2.4 kB/s 1 20

W
W

output pulse width
Rxd signal, electrical

115.2 kB/s 1 8

output pulse width

**) BER = 10–8 is target of IrDA specification, defined sensitivities not related to BER = 10

V

emin

emax

E

emaxlow

edcmax

V

V

OH

tr, t

CC

S

3 5 5.5 V

1.3 2.5 mA

0.025 0.035 W/m

3300 5000 W/m

400 W/m

OL

0.5 0.8 V

VCC–0.5 V

4 mA

f

20 200 ns

–8

0.004 W/m

m

m

2

2

2

2

s

s

2 (10)

TELEFUNKEN Semiconductors

Rev . A6, 15-Aug-96

Preliminary Information

TFDS3000

Parameter Test Conditions Symbol Min. Typ. Max. Unit

Output delay time (Rxd)

Max. delay of leading
edge of output signal
related to leading edge
of optical input signal

Jitter, leading edge of
output signal

Output delay time (Rxd)

Max. delay of trailing
edge of output signal
related to trailing edge
of optical input signal

Latency Recovery from last

Transmitter

Supply voltage

switching specs only
cover 4.5 to 5.5 V

Driver Current IRED

I

can be adjusted by

d

variation of R

S

Logic low transmitter
input voltage

Logic high transmitter
input voltage

Output radiant intensity



= "15°

Angle of half intensity
Peak wavelength of

emission
Halfwidth of emission

spectrum
Optical rise / fall time 115.2 kHz square wave

Output radiant intensity Logic LOW level 0.4
Overshoot, optical 25 %
Rising edge peak-to-peak

jitter

Output level = 0.5 V

@ Ee = 0.040 W/m

CC

2

Over a period of 10 bit,

115.2 kB/s
Output level = 0.5 V

CC

transmitted pulse to

1.1 threshold sensitivity

Current limiting resistor in
series to IRED:
R

= 10

 

S

5 V

Max. input current
I

< 100 A

in

Current limiting resistor in
series to IRED: R
V

= 5 V

CC

= 10 ,

S

signal (1:1)

Over a period of 10 bits,
independent of information
content

1 2

2

6.5

t

L

V

CC

I

d

3 5.5 V

100 800

0.3 0.5 A









VIL(Txd) 0 0.8 V

VIH(Txd) 2.4 V

CC

40 60 200 mW/sr





p

850 870 900 nm

"

24 °

60 nm

200 600 ns



W/sr

t

j

0.2



s

s

s

s

V

s

TELEFUNKEN Semiconductors

Rev . A6, 15-Aug-96

3 (10)

Preliminary Information