Fiber Optics

V23826-H18-C316/356/366/376, SM 622MBd ATM/SDH/SONET 1x9 Trx, ext.temp.R.

5

APPLICATION NOTE

Single Mode 622 MBd ATM 1x9 Transceiver, DC/DC Version

3.3 V-Transceivers can be directly connected to SerDes-Chips

using standard PECL Termination network.

Value of R1...R4 may vary as long as proper 50

Ω termination to

is required for good EMI performance. Use short tracks from

tion notes for electrical interfacing are available upon request.

Ask for Appnote 82.

ting good EMI performance.

The transceiver contains an automatic shutdown circuit. Reset

is only possible if the power is turned off, and then on again.

Application Board available on request.

C7

C6

Laser

Driver

Signal

Detect

Limiting

Amplifier

Pre-

Amp

RD-

RD+

Tx+

Tx-

Serializer/

Deserializer

RD-

ECL/PECL

Driver

Receiver

PLL etc.

Infineon Transceiver

V23826-H18-C366

DC/DC Option

1

2

3

4

5

6

7

8

9

SD to upper level

TxD

TxD

SD

RxD

RxD

L1

L2

C2

C1

R9

C3

C4

C5

3.3 V

3.3 V

RD+

C1/2/3

= 4.7 µF

C4/5/6/7 = 100 nF

L1/2

= 1 µH

R10/11

= 127

Ω (3.3 V)

(depends on SerDes chip used)

R7/8

= 82

Ω (3.3 V)

(depends on SerDes chip used)

R5/6

= 150

Ω (3.3 V)

R9

= 270

Ω (3.3 V)

Place R1/2/3/4 close to SerDes chip, depends on

SerDes chip used, see application note of SerDes supplier.

Place R7/8/10/11 close to Infineon Transceiver.