DS1876 Datasheet, PDF (1/69 Pages) Maxim Integrated Products – SFP Controller with Dual LDD Interface

19-5153; Rev 0; 2/10
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
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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.