XMT5370B622-FP [AGILENT]

622 Mb/s Logic Interface Laser Transmitter; 622 Mb / s的逻辑接口激光发射器


型号：	XMT5370B622-FP
厂家：	AGILENT TECHNOLOGIES, LTD.
描述：	622 Mb/s Logic Interface Laser Transmitter 622 Mb / s的逻辑接口激光发射器光纤监视器 PC 通信
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622 Mb/s Logic Interface

Laser Transmitter

Technical Data

XMT5370622

Features

Description

• SONET/SDH Compliant to

STM4 I-4, S-4.1

The XMT5370622 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 622 Mb/s

transmission.

OC12 SR, IR.1

• -40°C to +85°C Operation

• Compact 20 Pin Package

• ECL/PECL Logic Interface

• Multisourced Pinout

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

Applications

The XMT5370622 provides analog

voltage outputs which are

proportional to laser bias current

and optical power. These may be

used with external circuitry to

detect end-of-life, or over

• SONET/SDH Systems

• Fiber to the Home

• Data Communications

Networks

temperature conditions.

The transmitter is packaged in a

20 pin 0.4” pitch DIP. Contact

your local representative for more

details.

external components or

adjustments are necessary.

Finally, a laser disable input is

provided to shut down the laser

for standby or test purposes.

Connection Diagram

Top View

Fiber Pigtail

Laser Bias Monitor (+)

Laser Back Facet Monitor (+)

V_CC

Laser Bias Monitor (-)

Laser Back Facet Monitor (-)

V_EE

DATA

V_CC

DATA

Transmit Disable

V_EE

V_CC

Case Ground (See note below)

V_CC

Case Ground (See note below)

V_CC

Laser

Pin Descriptions

3 k

Pin 2

Pin 4

Pins 1, 3, 10, 20, NC:

These pins should not be

connected and should be left open

circuit on the application PCB.

Pin 7, Transmit Disable:

Modulation

Current

Pin 7 floats to V when open

circuited, enabling the transmitter.

It must be biased within +3 V of

to disable.

I_BIAS

V_EE

Pin 2, Laser Bias Monitor (+):

See Figure 1.

Pins 11, 13, Ground:

The XMT5370622 case is plastic,

therefore these pins are not

connected.

Figure 1. Laser Bias Monitor Circuitry

Pin 4, Laser Bias Monitor (-):

See Figure 1.

V_CC

Pins 5, 14, V

Pins 15, 16, DATA, DATA:

These are differential ECL inputs.

If open circuited, they will float to

These pins are connected to

ground in +5 V systems and -5 V in

negative supply systems. If

connected to -5 V supply, the

network shown in Figure 3 should

be placed as close as possible to

these pins.

Monitor

Photodiode

Pin 19

Pin 17

3 k

» (V -1.3 V).

Pin 17, Laser Back Facet

Monitor (-):

See Figure 2.

200

3 k

Pins 6, 8, 9, 12, 18, V

Pin 19, Laser Back Facet

Monitor (+):

See Figure 2.

To Laser Bias

Control Circuitry

These pins are connected to +5 V

for positive supply systems and

ground for -5 V systems. If

connected to +5 V supply, the

network shown in Figure 3 should

be placed as close as possible to

these pins.

Figure 2. Back Facet Monitor Circuitry

DEVICE

SUPPLY

VOLTAGE

SUPPLY

1.0 µH

(-5 V or +5 V)

100 nF

10 µF

1 nF

Figure 3. Filter Network

XMT5370622 Block Diagram

LASER

PHOTODIODE

(rear facet monitor)

DATA

LASER

MODULATOR

DATA

ECL

INPUT

DISABLE

LASER BIAS

MONITOR

LASER BIAS

DRIVER

REAR FACET

MONITOR

LASER BIAS

CONTROL

The rear facet monitor is a signal

proportional to the laser output

power. This can be used as part of

a HI/LO light alarm.

The module provides the

necessary bias and modulation

control to maintain the extinction

ratio at better than 8.2 dB and the

waveform is compliant with

SONET/SDH Eyemask standard

G.957.

Functional Description

The ECL inputs allow operation

from many logic families and both

single-ended or differential signals.

As both DATA and DATA are

In the absence of data the laser

will emit a mean optical power

within the specified limits. The

extinction ratio and duty cycle

distortion are specified assuring a

50% duty cycle at the correct data

rate.

internally tied to V , for single

ended operation the unused input

requires no connection or biasing.

The laser bias control loop

compensates for temperature

induced variations in laser

performance. The bias current

monitor indicates the amount of

dc current supplied to the laser.

(This is approximately the laser

threshold current).

The disable function disables the

laser bias and modulator. The

switching threshold is V -3.2 V.

If this input is not connected the

module is enabled. This input may

be connected to a CMOS HI or

tied to V to disable.

Performance Specifications

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. Limits apply to each parameter in isolation, all

other parameters having values within the recommended operating conditions. It should not be assumed that limiting values of more than one

parameter can be applied to the product at the same time. Exposure to the absolute maximum ratings for extended periods can adversely affect

device reliability.

Parameter

Minimum Nominal Maximum

Units

Notes

Supply Voltage

Operating Case Temperature

A model

B model

-40

+85

+70

°C

Storage Temperature

-40

+85

°C

Fiber Tensile Strength

N/10s

Fiber Bend Radius

Lead Soldering (Temperature/Time)

+260/10

°C/Sec

Characteristics

Parameter

Center Wavelength

Spectral Width (RMS)

Average Output Power

Extinction Ratio

Minimum Nominal Maximum

Units

Notes

1270

1360

2.5

-8

-10

-15

dBm

8.2

Bias Monitor

0.1

mA/mV

Rear Facet Monitor Output

Supply Voltage

4.75

5.5

130

V_CC

5.0

Supply Current

Tx Disable

V_CC-3.2

Output Waveform

SONET/SDH Eyemask Compliant G.957

Notes:

1. In a coaxial direction with fiber feed through.

2. Over operating temperature range. A narrower operating temperature range will result in a smaller center wavelength spread.

Contact Agilent for details.

3. Other output power options are available. Contact Agilent for details.

4. Common mode signal V + 3.5 V nominal.

5. Common mode signal V + 1.2 V nominal.

6. With V connected to -5 V, V must be at 0 V. With V at +5 V, V must be at 0 V.

7. End of life at Tmax.

Drawing Dimensions

øG

Dimensions

Minimum

Nominal

Maximum

32.9

33.2

40.5

16.3

9.27

2.95

39.5

16.0

2.6

2.54

ØG

2.7

0.46

3.2

4.64

10.16

400

1220

All dimensions in mm

Ordering Information

XMT5370X622XX

Connector:

FP = FC/PC Polish

ST = ST

SC = SC

Temperature Option:

A = -40°C to +85°C

B = 0°C to +70°C

Model Name:

XMT5370

Allowable part numbers:

XMT5370A622-FP

XMT5370A622-ST

XMT5370A622-SC

XMT5370B622-FP

XMT5370B622-ST

XMT5370B622-SC

Handling Precautions

1. Normal handling precautions for electrostatic sensitive devices

should be taken.

2. Semiconductor lasers can be damaged by overloading or by

current surges. Appropriate transient protection should be taken.

This product conforms to the

applicable requirements of 21 CFR 1040 at the date of

manufacture

Date of Manufacture:

Agilent Technologies Inc., Whitehouse Road, Ipswich, England

www.semiconductor.agilent.com

Data subject to change.

5966-0461E (11/99)

ST is a Registered Trademark of AT&T.

XMT5370B622-FP [AGILENT]

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XMT5370B622-SC

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XMT5370B622-ST

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