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FM25640 Datasheet(PDF) 11 Page - Ramtron International Corporation |
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FM25640 Datasheet(HTML) 11 Page - Ramtron International Corporation |
11 / 14 page FM25640 Rev. 2.1 Aug 2003 11 of 14 AC Parameters (TA = -40° C to + 85° C, VDD = 4.5V to 5.5V unless otherwise specified) Symbol Parameter Min Max Units Notes fCK SCK Clock Frequency 0 5.0 MHz tCH Clock High Time 90 ns tCL Clock Low Time 90 ns tCSU Chip Select Setup 90 ns tCSH Chip Select Hold 90 ns tOD Output Disable 100 ns 2 tODV Output Data Valid 60 ns tOH Output Hold 0 ns tD Deselect Time 100 ns tR Data In Rise Time 1 µs 1,2 tF Data In Fall Time 1 µs 1,2 tH Data Hold Time 30 ns tSU Data Setup Time 20 ns tHS /Hold Setup Time 70 ns tHH /Hold Hold Time 40 ns tHZ /Hold Low to Hi-Z 100 ns 2 tLZ /Hold High to Data Active 50 ns 2 Notes 1. Rise and fall times measured between 10% and 90% of waveform. 2. Characterized but not 100% tested in production. Capacitance TA = 25° C, f=1.0 MHz, VDD = 5V Symbol Parameter Max Units Notes CO Output capacitance (SDA) 8 pF 1 CI Input capacitance 6 pF 1 Notes 1. This parameter is periodically sampled and not 100% tested. AC Test Conditions Input Pulse Levels 10% and 90% of VDD Input rise and fall times 10 ns Input and output timing levels VDD*0.5 Equivalent AC Load Circuit Data Retention VDD = 4.5V to 5.5V unless otherwise specified Parameter Min Units Notes Data Retention 10 Years |
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