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See Technical Specifications

DS1877T+ +BOM

SFP Controller for Dual Rx Interface

Manufacturer:

Analog Devices Inc.
Mfr.Part #:

DS1877T+
Datasheet:

DS1877T+ Datasheet (PDF)
Interface Type:

Serial, I2C
Supply Voltage - Max:

3.9 V
Supply Voltage - Min:

2.85 V
Minimum Operating Temperature:

- 40 C
EDA/CAD Models:

Request Free CAD Models for DS1877T+

DS1877T+ General Description

The DS1877 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality. The device supports all LOS functions for two receivers, and continually monitors for LOS of either channel. Four ADC channels monitor V_CC, temperature, and two differential external monitor inputs that can be used to meet all monitoring requirements. Two digital-to-analog converter (DAC) outputs with temperature-indexed lookup tables (LUTs) are available for additional monitoring and control functionality.

Key Features

Meets All SFF-8472 Control and Monitoring Requirements
Four Analog Monitor Channels: Temperature, V_CC, RSSI1, RSSI2
- RSSI1 and RSSI2 Support Internal and External Calibration
- Differential Input
- Common-Mode Range from GND to V_CC
- Scalable Dynamic Range
- Internal Direct-to-Digital Temperature Sensor
- Alarm and Warning Flags for All Monitored Channels
Two 10-Bit Delta-Sigma Outputs
Each Controlled by 72-Entry Temperature LUT
Digital I/O Pins: Four Inputs, Four Outputs
Comprehensive Loss-of-Signal (LOS) Detection System
Flexible, Two-Level Password Scheme Provides Three Levels of Security
120 Bytes of Password-1 Protected Memory
128 Bytes of Password-2 Protected Memory in Main Device Address
256 Additional Bytes Located at A0h Slave Address
Receiver 1 is Accessed at A2h Slave Address
Receiver 2 is Accessed at B2h Slave Address
I²C-Compatible Interface
+2.85V to +3.9V Operating Voltage Range
-40°C to +95°C Operating Temperature Range
28-Pin TQFN (5mm x 5mm x 0.75mm) Package

Application

Dual Rx Video SFPs
SFF, SFP, and SFP+ Transceiver Modules

Specifications

Product Category	Sensor Interface	Interface Type	Serial, I2C
Supply Voltage - Max	3.9 V	Supply Voltage - Min	2.85 V
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 95 C
Mounting Style	SMD/SMT	Height	0.75 mm
Input Type	Differential	Input Voltage	2.85 V to 3.9 V
Length	5 mm	Number of Channels	4 Channel
Pd - Power Dissipation	2.7586 W	Product Type	Sensor Interface
Reference Voltage	2 V	Series	DS1877T
Factory Pack Quantity	60	Subcategory	Interface ICs
Part # Aliases	DS1877T 90-1877T+000