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FAN1654 Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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FAN1654 Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 7 page PRODUCT SPECIFICATION FAN1654 2 REV. 1.0.5 4/17/02 Pin Assignments Pin Definitions * Pin Numbers in brackets are for the SOIC-14 package Typical Application Pin Number* Pin Name Pin Function Description 1, 2, 7 (4, 5, 10) VDD VDD. Input power for the LDO. 3, 6 (6, 9) VTTFORCE VTT Force Output. 4, 5, 8 (7, 8, 11) VSS Power Ground. 10 (12) VTTSENSE VTT Sense. Feedback for remote sense of the VTT voltage. 11 (13) VREFIN VREFIN. Alternative input for direct control of VTTOUT and VREFOUT. 12 (14) SHDN Shutdown. This active low shutdown turns off both VTT and VREFOUT. This pin has an internal pull-down, and must be externally driven high for the IC to be on. 13 (1) VSSQ Signal Ground. 14 (2) VREFOUT Buffered Voltage Reference Output. 15 (3) VDDQ VDDQ Input. Attach this pin to the VDDQ supply to generate VTT and VREFOUT. 9,16 NC No Internal Connection 14 13 12 11 10 9 8 1 2 3 4 5 6 7 FAN1654 SHDN VREFIN VTTSENSE VSS VDD VTTFORCE VSS VSSQ VREFOUT VDDQ VDD VDD VTTFORCE VSS 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 FAN1654 NC VDDQ VREFOUT VSSQ SHDN VREFIN VTTSENSE NC VDD VDD VTTFORCE VSS VSS VTTFORCE VDD VSS 16-Lead Plastic eTSSOP-16 θJC = 4˚C/W* *With package power slug soldered to 0.5 square inch copper area over backside ground plane of internal power plane 14-Lead Plastic SOIC θJC = 37˚C/W, θJA = 88˚C/W 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 100 µF 6V 10 µF GND VDD 1nF (connect to VTTFORCE at the load) VTTSENSE 470 µF 10 µF VTTFORCE 1nF GND VREFOUT SHDN VDDQ 10k FAN1654 Figure 1. (eTSSOP pinout shown) |
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