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MAX3967ETG Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX3967ETG Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 14 page 270Mbps SFP LED Driver ________________________________________________________________ Maxim Integrated Products 1 TCNOM 1 2 3 4 5 6 7 8 9 101112 13 14 15 16 17 18 19 20 21 22 23 24 TC PB1 PB2 PB3 VEEOUT VCCOUT VCCOUT VCC N.C. MON MODSET TOP VIEW THE EXPOSED PAD MUST BE CONNECTED TO GROUND FOR PROPER THERMAL AND ELECTRICAL PERFORMANCE MAX3967 THIN QFN (4mm x 4mm) Pin Configuration 19-3252; Rev 0; 5/04 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Ordering Information PART TEMP RANGE PIN-PACKAGE MAX3967ETG -40°C to +85°C 24 Thin QFN MAX3967E/D -40°C to +85°C Dice* General Description The MAX3967 is a programmable LED driver for fiber optic transmitters operating at data rates up to 270Mbps. The circuit contains a high-speed current dri- ver with programmable temperature coefficient (temp- co), adjustments for LED prebias voltage, and a disable feature. The circuit accepts PECL data inputs, and operates from a single +2.97V to +5.5V power supply. The SFP LED driver can switch up to 100mA into typical high-speed light-emitting diodes. As temperature increases, the device’s modulation current increases with a tempco that is programmable from 2500ppm/°C to 12,000ppm/°C. The modulation current is pro- grammed with a single external resistor. The MAX3967’s LED prebias voltage is programmable from 400mV to 925mV. The prebias circuit produces peaking current, which improves the LED switching speed. Complementary current outputs help to maintain a con- stant supply current, reducing EMI and supply noise generated by the transmitter module. The MAX3967 is available in die form, or in a 4mm x 4mm, 24-pin thin QFN package. Applications Multimode LED Transmitters Fast Ethernet/FDDI 155Mbps LAN ATM Transceivers ESCON Receivers SFP Transceivers Features ♦ TX_DISABLE for SFP Compatibility ♦ Single +2.97V to +5.5V Power Supply ♦ Adjustable Temperature Compensation ♦ Adjustable Modulation Current ♦ Complementary Output Reduces Supply Noise ♦ Programmable LED Prebias Voltage ♦ Available in 24-Pin QFN or Die Typical Operating Circuits appear at end of data sheet. *Dice are tested and guaranteed only at TA = +25°C. |
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