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_______________________________________________________________ Maxim Integrated Products 1
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.
DS1876
SFP Controller with Dual LDD Interface
19-5153; Rev 0; 2/10
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 V
CC
, temperature, and four external
monitor inputs that can be used to meet all monitoring
requirements.
Applications
Dual Tx Video SFP Modules
Ordering Information
Features
S Meets All SFF-8472 Transmitter Control and
Monitoring Requirements
S Six Analog Monitor Channels: Temperature, V
CC
,
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 I
2
C-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
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
*EP = Exposed pad.
PART TEMP RANGE PIN-PACKAGE
DS1876T+
-40NC to +95NC
28 TQFN-EP*
DS1876T+T&R
-40NC to +95NC
28 TQFN-EP*
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Shrnutí obsahu

Strany 1 - 19-5153; Rev 0; 2/10

_______________________________________________________________ Maxim Integrated Products 1For pricing, delivery, and ordering information, pleas

Strany 2 - TABLE OF CONTENTS

10 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD Interface

Strany 3 - TABLE OF CONTENTS (continued)

______________________________________________________________________________________ 11DS1876SFP Controller with Dual LDD Interface

Strany 4 - LIST OF TABLES

12 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD Interface

Strany 5 - ABSOLUTE MAXIMUM RATINGS

______________________________________________________________________________________ 13DS1876SFP Controller with Dual LDD Interfaceonly differenc

Strany 6 - -5 +10 mV

14 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD Interfacecorresponding

Strany 7 - AC ELECTRICAL CHARACTERISTICS

______________________________________________________________________________________ 15DS1876SFP Controller with Dual LDD InterfaceThe ADC resu

Strany 8

16 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceFor all device

Strany 9

______________________________________________________________________________________ 17DS1876SFP Controller with Dual LDD InterfaceFigure 7. 3-Bi

Strany 10 - TOP VIEW

18 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceDigital I/O Pi

Strany 11

______________________________________________________________________________________ 19DS1876SFP Controller with Dual LDD InterfaceTransmit Fault

Strany 12 - DACs During Power-Up

2 ______________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTABLE OF CONTE

Strany 13 - Table 1. Acronyms

20 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD Interfaceof SCL during

Strany 14 - Monitors and Fault Detection

______________________________________________________________________________________ 21DS1876SFP Controller with Dual LDD Interfacealways the s

Strany 15 - BMON1 BMON2 PMON1 PMON2 TEMP

22 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceEEPROM Write C

Strany 16 - Delta-Sigma Outputs

______________________________________________________________________________________ 23DS1876SFP Controller with Dual LDD InterfaceAuxiliary Mem

Strany 17 - Figure 8. DAC OFFSET LUTs

24 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD Interface

Strany 18 - Digital I/O Pins

______________________________________________________________________________________ 25DS1876SFP Controller with Dual LDD Interface

Strany 19 - C Communication

26 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD Interface

Strany 20

______________________________________________________________________________________ 27DS1876SFP Controller with Dual LDD Interface

Strany 21 - C Protocol

28 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLower Memory R

Strany 22 - values

______________________________________________________________________________________ 29DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 23 - Shadowed EEPROM

_______________________________________________________________________________________ 3DS1876SFP Controller with Dual LDD InterfaceMemory Organiz

Strany 24 - Memory Map Access Codes

30 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 25 - Table 01h Register Map

______________________________________________________________________________________ 31DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 26 - Table 04h Register Map

32 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 27 - Table 06h Register Map

______________________________________________________________________________________ 33DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 28

34 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 29

______________________________________________________________________________________ 35DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 30

36 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 31

______________________________________________________________________________________ 37DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 32

38 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 33

______________________________________________________________________________________ 39DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 34

4 ______________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLIST OF FIGURE

Strany 35

40 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceLower Memory,

Strany 36

______________________________________________________________________________________ 41DS1876SFP Controller with Dual LDD InterfaceTable 01h, Reg

Strany 37 - <D>

42 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 01h, Reg

Strany 38

______________________________________________________________________________________ 43DS1876SFP Controller with Dual LDD InterfaceTable 01h, Reg

Strany 39

44 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 01h, Reg

Strany 40

______________________________________________________________________________________ 45DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 41

46 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 42

______________________________________________________________________________________ 47DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 43

48 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 44 - Table 02h, Register 80h: MODE

______________________________________________________________________________________ 49DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 45

_______________________________________________________________________________________ 5DS1876SFP Controller with Dual LDD InterfaceStresses beyo

Strany 46

50 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 47

______________________________________________________________________________________ 51DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 48

52 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 49

______________________________________________________________________________________ 53DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 50

54 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 51

______________________________________________________________________________________ 55DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 52

56 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 53

______________________________________________________________________________________ 57DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 54 - FACTORY DEFAULT FFFF FFFFh

58 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 55

______________________________________________________________________________________ 59DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 56

6 ______________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceMOD_, APC_ ELE

Strany 57

60 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 58

______________________________________________________________________________________ 61DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 59

62 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 60

______________________________________________________________________________________ 63DS1876SFP Controller with Dual LDD InterfaceTable 02h, Reg

Strany 61

64 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 04h Regi

Strany 62

______________________________________________________________________________________ 65DS1876SFP Controller with Dual LDD InterfaceTable 04h, Reg

Strany 63

66 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 06h, Reg

Strany 64

______________________________________________________________________________________ 67DS1876SFP Controller with Dual LDD InterfaceTable 06h, Reg

Strany 65

68 _____________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceTable 06h, Reg

Strany 66

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

Strany 67

_______________________________________________________________________________________ 7DS1876SFP Controller with Dual LDD InterfaceDIGITAL THERMO

Strany 68

8 ______________________________________________________________________________________DS1876SFP Controller with Dual LDD InterfaceNONVOLATILE ME

Strany 69 - SDA and SCL Pullup Resistors

_______________________________________________________________________________________ 9DS1876SFP Controller with Dual LDD Interface

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