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QL4016-4PL84M Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers |
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QL4016-4PL84M Datasheet(HTML) 11 Page - List of Unclassifed Manufacturers |
11 / 18 page © 2002 QuickLogic Corporation www.quicklogic.com 11 • • • • • • QL4016 QuickRAM Data Sheet Rev I Power-up Sequencing Figure 8: Power-up Requirements The following requirements must be met when powering up the device (refer to Figure 8): • When ramping up the power supplies keep (VCCIO -VCC)MAX ≤ 500 mV. Deviation from this recommendation can cause permanent damage to the device. • VCCIO must lead VCC when ramping the device. • The power supply must take greater than or equal to 400 µs to reach VCC. Ramping to VCC/VCCIO earlier than 400 µs can cause the device to behave improperly. An internal diode is present in-between VCC and VCCIO, as shown in Figure 9. Figure 9: Internal Diode Between VCC and VCCIO V CCIO V CC (V CCIO -VCC)MAX Time 400 us V CC V CC V CCIO Internal Logic Cells, RAM blocks, etc IO Cells |
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