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KM611001 Scheda tecnica(PDF) 7 Page - Samsung semiconductor |
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KM611001 Scheda tecnica(HTML) 7 Page - Samsung semiconductor |
7 / 8 page KM611001/L CMOS SRAM Rev 2.0 July-1996 7 NOTES (WRITE CYCLE) All write cycle timing is referenced from the last valid address to the first transition address. A write occurs during the overlap of a low /CS and a low /WE. A write begins at the latest transition among /CS going low and /WE going low; A write ends at the earliest transition among /CS going high and /WE going high. tWP is measured from the beginning of write to the end of write. tCW is measured from the later of /CS going low to end of write. tAS is measured from the address valid to the beginning of write. tWR is measured from the end of write to the address change. tWR applied in case a write ends as /CS, or /WE going high. If /CS goes low simultaneously with /WE going low or after /WE going low, the outputs remain high impedance state. Dout is the read data of the new address. 1. 2. 3. 4. 5. 6. 7. FUNCTIONAL DESCRIPTION /CS /WE Mode I/O Pin Supply Current H L L X* H L Not Select Read Write High-Z DOUT DIN ISB, ISB1 ICC ICC *Note : X means Don't Care. tSDR Data Retention Mode tRDR /CS Vcc-0.2V Vcc 4.5V 2.2V VDR /CS GND DATA RETENTION WAVE FORM (/CS Controlled) ≥ DATA RETENTION CHARACTERISTICS*(TA= 0 to 70 °C) * L-version only Parameter Symbol Test Condition Min. Max. Unit Vcc for Data Retention Data Retention Current Data Retention Set-Up Time Recovery Time VDR IDR tSDR tRDR /CS Vcc=3.0V, /CS VIN -0.2V or VIN See Data Retention Wave form(below) 5.5 0.1 - - V mA ns ms 2.0 - 0 5 ≥ Vcc-0.2V Typ. - - - - ≥ Vcc ≤ 0.2V ≥ Vcc-0.2V |
Codice articolo simile - KM611001 |
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Descrizione simile - KM611001 |
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