DS1874

更新时间： 2024-09-21 06:54:39

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
88页	1092K
描述
SFP+ Controller with Digital LDD Interface

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DS1874 数据手册

19-4691; Rev 0; 6/09

SFP+ Controller with Digital LDD Interface

DS1874

General Description

Features

The DS1874 controls and monitors all functions for SFF,

SFP, and SFP+ modules including all SFF-8472 func-

tionality. The combination of the DS1874 with the

MAX3798/MAX3799 laser driver/limiting amplifier pro-

vides APC loop, modulation current control, and eye

safety functionality. The DS1874 continuously monitors

for high output current, high bias current, and low and

high transmit power to ensure that laser shutdown for

eye safety requirements are met without adding external

♦ Meets All SFF-8472 Control and Monitoring

Requirements

♦ Laser Bias Controlled by APC Loop and

Temperature LUT to Compensate for Tracking

Error

♦ Laser Modulation Controlled by Temperature LUT

♦ Six Analog Monitor Channels: Temperature, V

MON1–MON4

components. Six ADC channels monitor V , tempera-

MON1–MON4 Support Internal and External

Calibration

ture, and four external monitor inputs (MON1–MON4)

that can be used to meet all monitoring requirements.

MON3 is differential with support for common mode to

Scalable Dynamic Range

Internal Direct-to-Digital Temperature Sensor

Alarm and Warning Flags for All Monitored

Channels

. Two digital-to-analog (DAC) outputs with tempera-

ture-indexed lookup tables (LUTs) are available for addi-

tional monitoring and control functionality.

♦ Two 9-Bit Delta-Sigma Outputs with 36 Entry

Temperature LUTs

Applications

♦ Digital I/O Pins: Five Inputs, Five Outputs

SFF, SFP, and SFP+ Transceiver Modules

♦ Comprehensive Fault-Measurement System with

Maskable Laser Shutdown Capability

Pin Configuration

♦ Flexible, Two-Level Password Scheme Provides

Three Levels of Security

TOP VIEW

♦ 256 Additional Bytes Located at A0h Slave

Address

21 20 19 18 17 16 15

♦ I C-Compatible Interface

N.C. 22

MON1

♦ 3-Wire Master to Communicate with the MAX3798/

MAX3799 Laser Driver/Limiting Amplifier

MON3N

♦ +2.85V to +3.9V Operating Voltage Range

♦ -40°C to +95°C Operating Temperature Range

♦ 28-Pin TQFN (5mm x 5mm) Package

12 MON3P

CSELOUT

SCLOUT

SDAOUT

LOSOUT

OUT1

MON4

TXDOUT

RSEL

DS1874

*EP

Ordering Information

GND

PART

TEMP RANGE

-40°C to +95°C

PIN-PACKAGE

28 TQFN-EP*

DS1874T+

DS1874T+T&R

+Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

THIN QFN

(5mm × 5mm × 0.8mm)

*EP = Exposed pad.

*EXPOSED PAD.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...88

中文翻译

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与DS1874相关器件

型号	品牌	获取价格	描述	数据表
DS1874T+	MAXIM	获取价格	SFP+ Controller with Digital LDD Interface
DS1874T+T&R	MAXIM	获取价格	暂无描述
DS1874T+TR	MAXIM	获取价格	SFP+ Controller with Digital LDD Interface
DS1875	MAXIM	获取价格	PON Triplexer and SFP Controller
DS1875RT+	MAXIM	获取价格	Analog Circuit, 1 Func, 5 X 7 MM, ROHS COMPLIANT, TQFN-38
DS1875T+	MAXIM	获取价格	PON Triplexer and SFP Controller
DS1875T+T&R	MAXIM	获取价格	Analog Circuit, 1 Func, CMOS, 5 X 7 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, TQFN-38
DS1875T+TR	MAXIM	获取价格	PON Triplexer and SFP Controller
DS1876	MAXIM	获取价格	SFP Controller with Dual LDD Interface
DS1876_V01	MAXIM	获取价格	SFP Controller with Dual LDD Interface

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