DS1876 查看數據表（PDF） - Maxim Integrated

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DS1876

SFP Controller with Dual LDD Interface

Maxim Integrated 

DS1876

SFP Controller with Dual LDD Interface

General Description

The DS1876 controls and monitors all functions for

dual transmitter modules. The memory map is based

on SFF-8472. The DS1876 supports APC and modula-

tion control and eye safety functionality for two laser

drivers. It continually 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 components. Six ADC

channels monitor VCC, temperature, and four external

monitor inputs that can be used to meet all monitoring

requirements.

Applications

Dual Tx Video SFP Modules

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

DS1876T+

-40NC to +95NC 28 TQFN-EP*

DS1876T+T&R

-40NC to +95NC 28 TQFN-EP*

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

T&R = Tape and reel.

*EP = Exposed pad.

Features

S Meets All SFF-8472 Transmitter Control and

Monitoring Requirements

S Six Analog Monitor Channels: Temperature, VCC,

PMON1, BMON1, PMON2, BMON2

PMON_ and BMON_ Support Internal and

External Calibration

Scalable Dynamic Range

Internal Direct-to-Digital Temperature Sensor

Alarm and Warning Flags for All Monitored

Channels

S Six Quick Trips for Fast Monitoring of Critical

Functions for Laser Safety

S Four 10-Bit Delta-Sigma Outputs

Each Controlled by 72-Entry Temperature

Lookup Table (LUT)

S Digital I/O Pins: Six Inputs, Five Outputs

S Comprehensive Fault Measurement System with

Maskable Laser Shutdown Capability

S Flexible, Two-Level Password Scheme Provides

Three Levels of Security

S 256 Additional Bytes Located at A0h Slave

Address

S Transmitter 1 is Accessed at A2h Slave Address

S Transmitter 2 is Accessed at B2h Slave Address

S I2C-Compatible Interface

S +2.85V to +3.9V Operating Voltage Range

S -40NC to +95NC Operating Temperature Range

S 28-Pin TQFN (5mm x 5mm x 0.8mm) Package

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

19-5153; Rev 0; 2/10

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