STX448DS4H000P1 [OPLINK]

Transmitter;


型号：	STX448DS4H000P1
厂家：	OPLINK COMMUNICATIONS INC.
描述：	Transmitter
文件：	总4页 (文件大小：407K)
中文：	中文翻译
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OC-48/STM-16 Transmitter

STX48 Series

Product Description

The STX48 modules are laser transmitters designed to meet or exceed

the SONET/SDH optical interface requirements at OC-48/STM-16 (2.5

Gb/s) data rate. Many performance versions are available which are fully

compliant with Short Reach, Intermediate Reach and Long Reach speciﬁ-

cations at 1310 nm or 1550 nm wavelength. The Short Reach version uses

uncooled Fabry Perot lasers while the Intermediate Reach version uses

uncooled DFB lasers. For the Long Reach version, uncooled DFB lasers

with internal optical isolators are used. All modules satisfy Class I Laser

Safety requirements in accordance with the US FDA/CDRH and interna-

tional IEC-825 standards.

The transmitter incorporates an Automatic Power Control (APC) circuit to

maintain the optical output power at a constant level against variations

in ambient temperature and device aging. It also features a Mode Selec-

tor input pin which selects between clocked and non-clocked operation.

In the clocked operation mode, the input DATA is resynchronized by the

input CLOCK before driving the laser diode in order to reduce output jit-

ter to a minimum. A Transmitter Disable control input is also provided.

Both the laser bias current and back-facet light output can be monitored

as well.

Features

 Fully compliant with SONET/SDH OC-48/ STM-16

(2.5 Gb/s) speciﬁcations

 Long Reach 1310 nm & 1550 nm as well as

Intermediate Reach and Short Reach

 Eye Safe (Class I Laser Safety)

All STX48 transmitter modules are available in two power supply options:

single +5V and single -5 V. The DATA and CLOCK interface can either be

direct PECL/ECL or via AC coupling. The operating temperature range is

-40°C to +85°C for the Short Reach and Intermediate Reach 1310 nm ver-

sion and 0°C to +70°C for the Long Reach version. All modules are housed

in a 24-pin dual-in-line metal package with a single mode ﬁber pigtail,

which is terminated with ST, FC or SC connector.

 Mode Selector switch between Clocked or Non-

clocked operation

 -40°C to +85°C Operating Temperature

(Intermediate Reach and Short Reach)

 24-pin DIP metal package

 FC, ST, SC-connectorized ﬁber pigtails

 Diﬀerential PECL DATA & CLOCK interface

 Single +5 V and - 5 V supply option

Absolute Maximum Ratings

Parameter

Symbol

Minimum

Maximum

Units

T_ST

Storage Temperature

- 40

+ 85

°C

“I”option (SR & IR only)

“H”option

- 40

+ 85

+ 70

Operating Case Temperature¹

V_OP

°C

V_CC- V_EE

V_IN- V_EE

Supply Voltage

+ 6.0

V_EE

V_CC- V_EE

Input Voltage

Lead Soldering Temperature & Time

260°C, 10 sec

R04.2008.04.30

Oplink Communications, Inc.

STX48 Series

(Over Operating Case Temperature.)

Transmitter Performance Characteristics

Parameter

Symbol

Minimum

Typical

Maximum

Units

Data Rate

0.05

- 10.0

- 5.0

- 2.0

8.2

2.5

- 7.0

- 3.0

3.0

- 3.0

Gb/s

Average Optical Output Power (50% duty cycle)

P_O

dBm

3.0

Extinction Ratio

P^hi/Plo

Short Reach (SR)

1266

1280

1500

1310

1550

1360

1335

1580

4.0

Intermediate Reach (IR)

Center Wavelength

λ_C

Long Reach (LR) 1310 nm

Long Reach (LR) 1550 nm

Short Reach

Spectral Width (RMS)

Spectral Width (-20 dB)

ΔλRMS

Δλ20

Intermediate Reach & Long Reach

1.0

Side Mode Suppression

Ratio

Intermediate Reach & Long Reach

SMSR

Transmitter Output Eye

Compliant with Bellcore TR-NWT-000253 and ITU-T Recommendation G.957

Receiver Electrical Interface

Parameter

Symbol

Minimum

Typical

Maximum

Units

Supply Voltage ¹

V_CC- V_EE

4.75

5.0

5.25

300

Supply Current

V_CC- 1.165

V_CC- 1.810

0.30

200

Input HIGH Voltage (DATA & CLOCK, PECL)

Input LOW Voltage (DATA & CLOCK, PECL)

Input Voltage (DATA & CLOCK, PECL)

Input DATA & CLOCK timing

V_IH

V_CC- 0.880

V_CC- 1.475

1.00

V_IL

V_IN

0.80

Vp-p

T_DC

200

300

Clocked

V_MSCK

V_MSNCK

V_DIS

V_EN

V_EE

V_EE+ 1.5

V_CC

MODE SELECTOR

Input Voltage

Non-Clocked

V_CC- 1.5

V_CC- 2.0

V_EE

Transmitter Disable Voltage

Transmitter Enable Voltage

V_CC

V_EE+ 0.6

V_EEV_CC

V_EE+ 0.5

200

HIGH Voltage

LOS Voltage

V_CC

LD Bias Alarm

Output Voltage

ALMH

V_EE- 1.0

ALML

at 25

100

300

100

Diﬀerential Bias

Monitor Voltage

V_{BM, DIF}

Decreasing Light Input

500

Diﬀerential Back Facet Monitor Voltage

V_FM,DIF

250

For +5V single supply modules, connect VCC to +5V and VEE to 0V or GND (circuit ground). The package housing is internally connected to VEE.

For - 5V single supply modules, connect VCC to 0V or GND (circuit ground) and VEE to - 5V. The package housing is internally connected to VCC.

Related OC-48/STM-16 Transceiver & Receiver Modules

SRX-48

SRC-48

: Receiver without Clock Recovery (24-pin DIP)

: Receiver with Clock Recovery (24-pin DIP)

DTR-2488-SM

DTR-2488-SM2

DTC-48

: Transceiver without Clock Recovery (industry standard 1x9 package)

: Transceiver without Clock Recovery (industry standard 2x9 package)

: Transceiver with Clock Recovery (industry standard 2x9 package)

Oplink Communications, Inc.

R04.2008.04.30

STX48 Series

Application Notes

When the DATA+ input is at logic HIGH and DATA- input is operation mode. In this mode, the input clock resynchronizes

at logic LOW, the LD is ON; and vice versa. The transmitter is the incoming data to reduce timing jitter.The timing between

normally enabled (i.e. when the TX DISABLE control input is the DATA and CLOCK inputs is as shown below. When the

not connected). When theTX DISABLE input voltage is higher MODE SELECTOR input at logic “HIGH” (V_CC- 1.5V to V_CC),

than V_CC- 2 V, the laser is disabled (less than -30dBm output the transmitter is in non-clocked operation mode. In this

power) independent of the input data.

mode, the CLOCK inputs are not used and hence need not

be provided.

The transmitter incorporates an Average Power Control (APC)

loop to stabilize the transmitter average optical output power

against temperature variation. The APC loop always acts

to keep the transmitter average optical output power at a

constant value (when the transmitter is enabled). Therefore,

when the input data is all continuous“zeroes”or all continuous

“ones”, the transmitter optical output power is a constant level

equal to the nominal average optical output power (not at the

“OFF”level or at the “ON”level).

The transmitter has internal 50 ohm termination to V_TD(pin 6)

for DATA inputs & V_TC(pin 19) for CLOCK inputs. The DATA &

CLOCK interface can be either direct PECL/ECL coupling or via

AC coupling as shown below. The use of diﬀerential signals is

strongly recommended. In cases where only single-ended signal

is available, the unused DATA input pin should be biased to V_CC

- 1.29 V for direct PECL/ ECL coupling or bypassed to AC Ground

for AC coupling. Similarly, the unused CLOCK input pin should

be bypassed with a 0.01 μF capacitor to V_EE

When the MODE SELECTOR input is left unconnected or at

logic “LOW” (V_EEto V_EE+ 1.5V), the transmitter is in clocked

Interface Circuit

50 ohm line

DATA+/

CLK+

DATA+ / CLK+

7 / 18

6 / 19

7 / 18

6 / 19

0.022

VCC - 2 V

0.01

STX-48

0.022

DATA-/

CLK-

DATA- / CLK-

5 / 20

50 ohm line

DIFFERENTIAL

DIRECT-COUPLED PECL

DIFFERENTIAL

AC-COUPLED

Timing Diagram (Clocked Operation)

Monitor Circuit

VCC

T_DC

3KΩ

mon

3KΩ

DATA

10Ω

200Ω

3KΩ

Control

Circuit

Bias

Circuit

CLOCK

VEE

Oplink Communications, Inc.

R04.2008.04.30

STX48 Series

(Dimension in inches)

Package Outline

Pinout Assignments

FUNCTION

VCC

Laser Safety: All transceivers are Class I Laser

products per FDA/CDRH and IEC-60825 stan-

dards. They must be operated under speciﬁed

operating conditions.

FM + (LD FACET MONITOR +)

FM - (LD FACET MONITOR -)

DATA INPUT -

BM+ (LD BIAS MONITOR +)

BM- (LD BIAS MONITOR -)

CLK - (INPUT CLOCK -)

VTD (TERMINATION FOR DATA)

DATA INPUT +

VTC (TERMINATION FOR CLK)

CLK+ (INPUT CLOCK +)

Oplink Communications, Inc.

DATE OF MANUFACTURE:

DO NOT CONNECT

(FOR INTERNAL USE ONLY)

MODE SELECTOR

(CLOCKED or NON-CLOCKED)

This product complies with

21 CFR 1040.10 and 1040.11

Meets Class I Laser Safety Requirements

VCC

VEE

TX DISABLE INPUT

ALM (LD BIAS ALARM)

VEE

Ordering Information

STX

Type

2x5 +5V= 4

2x5 -5V= B

Temperature Range

-40 ~85˚C (SR & IR only)= I

0~70˚C (LR only)= H

Option

Optical Output Power

-7dBm (Typ.)= B

-3dBm (Typ.)= D

pigtail FC= P1

pigtail ST= P2

pigtail SC= P3

0dBm (Typ.)= F

Distance Option

Short Reach (-7dBm only)= S0

Intermediate Reach (“-3dBm”only)=S3

Long Reach1310nm (“0dBm”only)= S4

Long Reach1550nm (“0dBm”only)= F2

Oplink Communications, Inc. reserves the right to make changes in equipment design or speciﬁcations without notice. Information supplied by Oplink Commu-

nications, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Oplink Communications, Inc. for its use nor for any infringements

of third parties, which may result from its use. No license is granted by implication or otherwise under any patent right of Oplink Communications, Inc.

R04. 2008.04.30

STX448DS4H000P1 [OPLINK]

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