HP XMT5170A-155-ST, XMT5170A-155-SC, XMT5170A-155-FP, XMT5170B-155-ST, XMT5170B-155-SC Datasheet

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HP XMT5170A-155-ST, XMT5170A-155-SC, XMT5170A-155-FP, XMT5170B-155-ST, XMT5170B-155-SC Datasheet

155 Mb/s Logic Interface Laser Transmitter for OC3/STM1

Preliminary Technical Data

XMT5170-155

Features

SONET/SDH Compliant to

STM1 L-1.1 OC3 LR-1

–40°C to +85°C Operation

Compact 20 Pin Package

ECL/PECL Logic Interface

Multisourced Pinout

Fully Interchangeable High and Low Power Versions

Applications

SONET/SDH Systems

Single Mode ATM

Fiber to the Home

Data Communications Networks

Description

The XMT5170-155 is a high performance uncooled optical laser transmitter for CCITT SDH and ANSI SONET applications. It is designed with an ECL/PECL logic interface for 155 MBd transmission.

The transmitter incorporates several features which simplify system design. It may be operated with either +5 V or –5 V power supplies. Standard 10 KH ECL data interface enables direct interface with PECL or ECL logic. The compact transmitter module contains a pigtailed laser, data interface, bias and modulation control circuitry. Thus, no external components or adjustments are necessary. Finally, a

laser disable input is provided to shut down the laser for standby or test purposes.

The XMT5170-155 has -2 dBm mean output power for long haul systems.

The XMT5170-155 includes analog outputs which are proportional to laser current and optical power. These may be used with external circuitry to detect end-of-life, or over temperature conditions.

The transmitter is packaged in a 20 pin 0.4" pitch DIP. An evaluation board is available for this product. Contact your local representative for more details.

Preliminary Product Disclaimer

This preliminary data sheet is provided to assist you in the evaluation of engineering samples of the product which is under development and targeted for release during 1997. Until Hewlett-Packard releases this product for general sales, HP reserves the right to alter prices, specifications, features, capabilities, function, manufacturing release dates, and even general availability of the product at any time.

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(5/97)

Connection Diagram

Top View

FIBER PIGTAIL

NC

1

20

NC

LASER BIAS MONITOR (+)

2

19

LASER BACK FACET MONITOR (+)

NC

3

18

VCC

LASER BIAS MONITOR (–)

4

17

LASER BACK FACET MONITOR (–)

VEE

5

16

DATA

VCC

6

15

DATA

TRANSMIT DISABLE

7

14

VEE

VCC

8

13

CASE GROUND (SEE NOTE BELOW)

VCC

9

12

VCC

NC

10

11

CASE GROUND (SEE NOTE BELOW)

Pin Descriptions

Pins 1, 3, 10, 20, NC:

These pins should not be connected and should be left open circuit on the application PCB.

Pin 2, Laser Bias Monitor (+):

See Figure 1.

Pin 4, Laser Bias Monitor (–):

See Figure 1.

Pins 5,14, VEE:

These pins are connected to ground in +5 V systems and –5 V in negative supply systems.

Pins 6, 8, 9, 12, 18, VCC:

Pins 15, 16, DATA, DATA:

These pins are connected to +5 V

These are differential ECL inputs.

for positive supply systems and

If open circuited they float to VBB

ground for –5.2 V systems.

(VCC –1.3 V).

Pin 7, Transmit Disable:

Pin 7 floats to VEE when open circuited, enabling the transmitter. It must be biased within 3 V of VCC to disable.

Pins 11,13, Ground:

The XMT5170-155 case is plastic, therefore pins are not connected.

Pin 17, Laser Back Facet

Monitor (–):

See Figure 2.

Pin 19, Laser Back Facet

Monitor (+):

See Figure 2.

3 kΩ

PIN 2

3 kΩ

PIN 4

VCC

VCC

LASER

 

MONITOR

 

 

PHOTODIODE

 

 

 

3 kΩ

 

 

 

PIN 19

 

10 Ω

MODULATION

200

Ω

CURRENT

 

 

 

 

3 kΩ

 

 

 

PIN 17

 

 

IBIAS

 

TO LASER BIAS

 

 

 

 

 

 

 

 

 

VEE

 

CONTROL CIRCUITRY

Figure 1. Laser Bias Monitor Circuitry.

Figure 2. Back Facet Monitor Circuitry.

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