I7230N Datasheet, PDF (1/1 Pages) Taiwan Memory Technology – i7230N 155M to 4.25Gbps LD Driver

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i7230N 155M to 4.25Gbps LD Driver
General Description
The i7230N is a +3.3V laser diode driver for SFP/SFF applications up to 4.25Gbps. The device accepts
differential input data and provides bias and modulation currents for driving a laser. DC-coupling laser to the
device eases of multi rate applications and reduces the external component count. The i7230N is fully
compliant with the SFP MSA timing and the SFF-8472 transmits diagnostic requirements.
An automatic power control (APC) feedback loop is incorporated to maintain a constant average optical
power over temperature and lifetime. Optional temperature compensation compensates Laser Diode
extinction ratio change with temperature over 500PPM ~ 10,000PPM range. The wide modulation current
range of 3mA to 80mA and bias current of 1mA to 100mA make this product ideal for driving FP/DFB laser
diodes in fiber optic modules.
The i7230N also provides transmit-disable control (DISABLE), a single-point latched transmit-failure
monitor output (FAULT), photocurrent monitoring, and bias-current monitoring to indicate faults, such as when
the APC loop is unable to maintain the average optical power.
The i7230N comes in a 4mm * 4mm 24-pin QFN package and operates over the extended temperature
range of -40°C to +85°C.
Applications
Gigabit Ethernet SFP/SFF and GBIC Transceiver
1G/2G/4G Fiber Channel SFP/SFF Transceiver Modules
Multi-rate OC3 to OC24-FEC SFP/SFF Transceiver Modules
Features
Programmable Modulation Current from 3mA to 60mA (DC-Coupled)
Programmable Modulation Current from 3mA to 80mA (AC-Coupled)
Programmable temperature compensation
Programmable Bias Current from 1mA to 100mA
Edge Transition Time < 80ps
51mA Typical Power-Supply Current
Multi rate 155Mbps to 4.25Gbps Operation
24-Pin 4mm * 4mm QFN package
TM Technology Inc. reserves the right to change products or specifications without notice.