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28C256 Datasheet(PDF) 11 Page - Xicor Inc. |
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28C256 Datasheet(HTML) 11 Page - Xicor Inc. |
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11 / 24 page  X28C256 11 ENDURANCE AND DATA RETENTION Parameter Min. Units Endurance 100,000 Cycles Data Retention 100 Years 3855 PGM T05.3 POWER-UP TIMING Symbol Parameter Max. Units tPUR(4) Power-up to Read Operation 100 µs tPUW(4) Power-up to Write Operation 5 ms 3855 PGM T06 CAPACITANCE TA = +25°C, f = 1MHz, VCC = 5V Symbol Parameter Max. Units Test Conditions CI/O(4) Input/Output Capacitance 10 pF VI/O = 0V CIN(4) Input Capacitance 6 pF VIN = 0V 3855 PGM T07.1 A.C. CONDITIONS OF TEST Input Pulse Levels 0V to 3V Input Rise and Fall Times 10ns Input and Output Timing Levels 1.5V 3855 PGM T08.1 MODE SELECTION CE OE WE Mode I/O Power L L H Read DOUT Active L H L Write DIN Active H X X Standby and High Z Standby Write Inhibit X L X Write Inhibit — — X X H Write Inhibit — — 3855 PGM T09 Note: (4) This parameter is periodically sampled and not 100% tested. EQUIVALENT A.C. LOAD CIRCUIT WAVEFORM INPUTS OUTPUTS Must be steady Will be steady May change from LOW to HIGH Will change from LOW to HIGH May change from HIGH to LOW Will change from HIGH to LOW Don’t Care: Changes Allowed Changing: State Not Known N/A Center Line is High Impedance SYMBOL TABLE 3855 FHD F22.3 5V 1.92K Ω 100pF OUTPUT 1.37K Ω |
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