Datasheet > 1243FAFD

1243FAFD

更新时间： 2024-02-15 02:50:22

品牌	Logo	应用领域
杰尔 - AGERE		电信集成电路异步传输模式 ATM
页数	文件大小	规格书
12页	167K
描述
1241/1243/1245-Type Uncooled Laser Transmitter

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1243FAFD 技术参数

生命周期：	Transferred	零件包装代码：	DIP
包装说明：	,	针数：	20
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.42	应用程序：	SONET;SDH
JESD-30 代码：	R-PXFO-X	功能数量：	1
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装形状：	RECTANGULAR
封装形式：	FIBER OPTIC	认证状态：	Not Qualified
标称供电电压：	5 V	表面贴装：	NO
技术：	CMOS	电信集成电路类型：	ATM/SONET/SDH TRANSMITTER
温度等级：	INDUSTRIAL	端子形式：	UNSPECIFIED
端子位置：	UNSPECIFIED	Base Number Matches：	1

1243FAFD 数据手册

Data Sheet

September 1999

1241/1243/1245-Type Uncooled Laser

Functional Overview (continued)

LASER

BACK-FACET

DETECTOR

FIBER PIGTAIL

15 k•

(2)

(+)

LASER BIAS MONITOR VOLTAGE

(4)

(–)

15 k•

(19)

(+)

LASER BACK-FACET MONITOR VOLTAGE

15 k•

(17)

(–)

IBF

BAND GAP

AUTOMATIC POWER

10 •

REFERENCE

CONTROL CIRCUITRY

TEMPERATURE

SENSOR

(16)

DATA

INPUT DATA

COMPARATOR

30 k•

BIAS

MODULATION

CIRCUITRY

CC – 1.3 V

MOD

(15)

DATA

(7)

TRANSMITTER

DISABLE

1-868(C).h

Figure 1. Simplified Transmitter Schematic Input Data

Input Data

input signal, the optical signal will be the complement

of the data input signal.

Data enters the transmitter through a comparator.

These inputs have internal pull-down resistors to a volt-

age reference that is 1.3 V below V^CC. This configura-

tion allows the transmitter to be driven from either a

single-ended or a differential input signal. Since the

input is a comparator instead of a gate, the absolute

input signal levels are not important when the inputs

are driven differentially. When driven single-ended,

however, the input signal voltage should be centered

around V^CC– 1.3 V to eliminate pulse-width distortion.

With a single-ended input, either input can be used and

the unused input can be left as an open circuit due to

the internal reference shown in Figure 1. The optical

output signal will be in the same sense as the input

data—an input logic high turns the laser diode on and

an input logic low turns the laser diode off. However, if

the negative input is used with a single-ended data

The differental inputs of the 1241 Gbit versions are ter-

minated internally with 100 Ω between the DATA and

DATA inputs.

Minimum Data Rate

Because the modulation and bias control circuitry are

influenced by the input data pattern, the standard

transmitter cannot be used in burst-mode type applica-

tions. For burst-mode applications, please contact your

Agere Account Manager. The minimum data rate

(pseudorandom data, 50% average duty cycle) for the

1241/1243/1245-Type Transmitters is approximately

1 Mbit/s.

Agere Systems Inc.

1 234 5 6 7...12

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