V23826-K15-Cxx/Cxxx

Description

Data Sheet

4

2000-03-09

The following versions are available:

1 AC/DC Transceiver: Tx is AC coupled. Differential 100

W load. Rx has standard PECL

output and is DC coupled.

2 AC/AC TTL Transceiver: Tx and Rx are AC coupled. Tx has differential 100

W load.

Signal Detect is TTL compatible.

3 DC/DC Transceiver: Standard PECL inputs and outputs Tx and Rx are DC coupled.

This version contains an Input Signal Monitor (ISM) which switches off the transceiver

if a continuous low level is applied at Data Input.

4 AC/AC PECL Transceiver: Tx and Rx are AC coupled. Tx has differential 100

W load.

Signal Detect is PECL compatible.

The transmitter contains a laser driver circuit that drives the modulation and bias current

of the laser diode. The currents are controlled by a power control circuit to guarantee

constant output power of the laser over temperature and aging.

The power control uses the output of the monitor PIN diode (mechanically built into the

laser coupling unit) as a controlling signal, to prevent the laser power from exceeding the

operating limits.

Single fault condition is ensured by means of an integrated automatic shutdown circuit

that disables the laser when it detects transmitter failures. A reset is only possible by

turning the power off, and then on again.

The transceiver contains a supervisory circuit to control the power supply. This circuit

generates an internal reset signal whenever the supply voltage drops below the reset

threshold. It keeps the reset signal active for at least 140 milliseconds after the voltage

has risen above the reset threshold. During this time the laser is inactive.

Regulatory Compliance

Feature

Standard

Comments

Electrostatic Discharge (ESD)

to the Electrical Pins

MIL-STD 883C

Method 3015.4

Class 1 (> 1000 V)

Immunity:

Electrostatic Discharge (ESD)

to the Duplex SC Receptacle

EN 61000-4-2

IEC 61000-4-2

Discharges of

–15 kV with an air

discharge probe on the receptacle

cause no damage.

Immunity:

Radio Frequency

Electromagnetic Field

EN 61000-4-3

IEC 61000-4-3

With a field strength of 10 V/m rms,

noise frequency ranges

from 10 MHz to 1 GHz. No effect

on transceiver performance

between the specification limits.

Emission:

Electromagnetic Interference

EMI

FCC Class B

EN 55022 Class B

CISPR 22

Noise frequency range: 30 MHz to

6 GHz; Margins depend on PCB

layout and chassis design