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FT7521FHX Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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FT7521FHX Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page September 2012 © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FT7521 • Rev. 1.0.7 FT7521 Reset Timer with Fixed Delay and Reset Pulse Features Fixed Reset Delay: 7.5 Seconds One Input Reset Pin Open-Drain Output Pin with Fixed 400ms Pulse 1.8 V to 5.0 V Operation (TA=-40°C to +85°C) 1.7 V to 5.0 V Operation (TA=-25°C to +85°C) 1.65 V to 5.00 V Operation (TA=0°C to +85°C) <1 µA ICCQ Consumption Zero-Second Test-Mode Enable Integrated Pull-Up Resistor on /SRO Applications Cell Phones Portable Media Players Tablets Mobile Devices Consumer Medical Description The FT7521 is a timer for resetting a mobile device where long reset times are needed. The long delay helps avoid unintended resets caused by accidental key presses. It has a fixed delay of 7.5 ±20% seconds. The DSR pin enables Test Mode operation by immediately forcing /RST1 LOW for factory testing. The FT7521 has one input for single-button resetting capability. The device has a single open-drain output with 0.5 mA pull-down drive. FT7521 draws minimal ICC current when inactive and functions over a power supply range of 1.65 V to 5.0 V. Figure 1. Block Diagram Ordering Information Part Number Operating Temperature Range Package Packing Method FT7521L6X -40 C to +85C 6-Lead, MicroPak™ 1.0 x 1.45 mm, JEDEC MO-252 5000 Units on Tape and Reel FT7521FHX (Preliminary) 6-Lead, MicroPak2™ 1.0 x 1.0 mm Body, .35 mm Pitch |
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