DS1876：SFP Controller with Dual LDD Interface _ BDTIC a Leading Distributor in China

DS1876：SFP Controller with Dual LDD Interface

Industry's First Dual Tx Controller for Video SFP Modules

The DS1876 controls and monitors all functions for dual transmitter modules. The memory map is based on SFF-8472. The DS1876 supports APC and modulation 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.

Key Features

Meets All SFF-8472 Transmitter Control and Monitoring Requirements
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
Six Quick Trips for Fast Monitoring of Critical Functions for Laser Safety
Four 10-Bit Delta-Sigma Outputs
- Each Controlled by 72-Entry Temperature Lookup Table (LUT)
Digital I/O Pins: Six Inputs, Five Outputs
Comprehensive Fault Measurement System with Maskable Laser Shutdown Capability
Flexible, Two-Level Password Scheme Provides Three Levels of Security
256 Additional Bytes Located at A0h Slave Address
Transmitter 1 Is Accessed at A2h Slave Address
Transmitter 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 0.8mm) Package

DS1876: Typical Operating Circuit

Applications/Uses

Dual Tx Video SFP Modules

DataSheet

title	Download file
DS1876 Data Sheet	DS1876.pdf

Parametrics

Part Number	ADCs	Resolution (bits)	DACs/ Resistors	FS Out (kΩ)	Steps	Temp. Sensor	Memory	V_SUPPLY (V)	Control Interface	Package/Pins	Budgetary Price
Part Number	ADCs	Resolution (bits)	DACs/ Resistors	FS Out (kΩ)	Steps	Temp. Sensor	Memory	V_SUPPLY (V)	Control Interface	Package/Pins	See Notes
DS1876	5-Input Muxable	13	4 DACs	None	None	Internal	EEPROM	2.85 to 3.9	I2C	TQFN/28	$1.68 @1k

Quality and Environmental Data

DS1876.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
DS1876T+	Active		TQFN,;28 pin;26 mm²	-40°C to +85°C	Lead Free
DS1876T+T&R	Active		TQFN,;28 pin;26 mm²	-40°C to +85°C	Lead Free

DS1876.pdf DS1876