ft7521 Fairchild Semiconductor, ft7521 Datasheet
ft7521
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ft7521 Summary of contents
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... Fairchild Semiconductor Corporation FT7521 • Rev. 1.0.1 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 ...
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... Used for device testing; should be tied to GND 6 TEST during normal use. Note: 1. This pin must always be tied to either GND or VCC. It must not float. © 2009 Fairchild Semiconductor Corporation FT7521 • Rev. 1.0.1 Figure 1. Block Diagram Figure 2. Pad Assignments (Top-Through View) Description Normal Operation (1 ...
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... Functional Description Device default operation time N is 7.5s. If the DSR pin is pulled HIGH prior to V ramp, the FT7521 enters Test CC Mode and the reset output, /RST1, is immediately pulled LOW for factory testing. The DSR pin MUST be forced to GND during normal operation. The DSR pin should never be driven HIGH or left to FLOAT during normal operation ...
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... IN V Output Voltage OUT I DC Output Sink Current OL T Free-Air Operating Temperature A Thermal Resistance JA © 2009 Fairchild Semiconductor Corporation FT7521 • Rev. 1.0.1 Conditions /SR0, DSR /RST1 V < < 0V OUT Human Body Model, JESD22-A114 Charged Device Model, JESD22-C101 Conditions V =0V After Power Down, CC Rising to 0 ...
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... PHL1 t Reset Timeout Delay REC Capacitance Specifications T =+25C. A Symbol Parameter C Input Capacitance IN C Output Capacitance OUT © 2009 Fairchild Semiconductor Corporation FT7521 • Rev. 1.0.1 Conditions Min. DSR, /SR0 0. DSR, /SR0 RST, I =500µ V 5.0V IN /SR0=V ...
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... AC Test Circuit and Waveforms Figure 4. © 2009 Fairchild Semiconductor Corporation FT7521 • Rev. 1.0.1 AC Test Circuit and Waveforms for /RST1 Output ST Output 6 www.fairchildsemi.com ...
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... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FT7521 • Rev. 1.0 ...
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... Fairchild Semiconductor Corporation FT7521 • Rev. 1.0.1 8 www.fairchildsemi.com ...