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HCMS-2972 Datasheet(PDF) 7 Page - Agilent(Hewlett-Packard) |
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HCMS-2972 Datasheet(HTML) 7 Page - Agilent(Hewlett-Packard) |
7 / 16 page 7 AC Timing Characteristics Over Temperature Range (-40 °C to +85°C) Timing Diagram Ref. 4.5 V < VLOGIC <5.5 V VLOGIC = 3 V Number Description Symbol Min. Max. Min. Max. Units 1 Register Select Setup Time to trss 10 10 ns Chip Enable 2 Register Select Hold Time to trsh 10 10 ns Chip Enable 3 Rising Clock Edge to Falling tclkce 20 20 ns Chip Enable Edge 4 Chip Enable Setup Time to tces 35 55 ns Rising Clock Edge 5 Chip Enable Hold Time to tceh 20 20 ns Rising Clock Edge 6 Data Setup Time to Rising tds 10 10 ns Clock Edge 7 Data Hold Time after Rising tdh 10 10 ns Clock Edge 8 Rising Clock Edge to DOUT[1] tdout 10 40 10 65 ns 9 Propagation Delay DIN to DOUT tdoutp 18 30 ns Simultaneous Mode for one IC[1,2] 10 CE Falling Edge to DOUT Valid tcedo 25 45 ns 11 Clock High Time tclkh 80 100 ns 12 Clock Low Time tclkl 80 100 ns Reset Low Time trstl 50 50 ns Clock Frequency Fcyc 54 MHz Internal Display Oscillator Finosc 80 210 80 210 KHz Frequency Internal Refresh Frequency Frf 150 410 150 400 Hz External Display Oscillator Fexosc Frequency Prescaler = 1 51.2 1000 51.2 1000 KHz Prescaler = 8 410 8000 410 8000 KHz Notes: 1. Timing specifications increase 0.3 ns per pf of capacitive loading above 15 pF. 2. This parameter is valid for Simultaneous Mode data entry of the Control Register. |
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