전자부품 데이터시트 검색엔진 |
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Q67120-C1000 데이터시트(PDF) 36 Page - Siemens Semiconductor Group |
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Q67120-C1000 데이터시트(HTML) 36 Page - Siemens Semiconductor Group |
36 / 48 page C501 Semiconductor Group 36 1997-04-01 AC Characteristics for C501-L24 / C501-1R24 / C501-1E24 (cont’d) External Data Memory Characteristics External Clock Drive Characteristics Parameter Symbol Limit Values Unit 24 MHz Clock Variable Clock 1/ t CLCL = 3.5 MHz to 24 MHz min. max. min. max. RD pulse width t RLRH 180 – 6 t CLCL – 70 – ns WR pulse width t WLWH 180 – 6 t CLCL – 70 – ns Address hold after ALE t LLAX2 15 – t CLCL – 27 – ns RD to valid data in t RLDV – 118 – 5 t CLCL – 90 ns Data hold after RD t RHDX 0 – 0–ns Data float after RD t RHDZ –63 – 2 t CLCL – 20 ns ALE to valid data in t LLDV – 200 – 8 t CLCL – 133 ns Address to valid data in t AVDV – 220 – 9 t CLCL – 155 ns ALE to WR or RD t LLWL 75 175 3 t CLCL – 50 3 t CLCL + 50 ns Address valid to WR or RD t AVWL 67 – 4 t CLCL – 97 – ns WR or RD high to ALE high t WHLH 17 67 t CLCL – 25 t CLCL + 25 ns Data valid to WR transition t QVWX 5– t CLCL – 37 – ns Data setup before WR t QVWH 170 – 7 t CLCL – 122 – ns Data hold after WR t WHQX 15 – t CLCL – 27 – ns Address float after RD t RLAZ – 0 –0ns Parameter Symbol Limit Values Unit Variable Clock Freq. = 3.5 MHz to 24 MHz min. max. Oscillator period t CLCL 41.7 285.7 ns High time t CHCX 12 t CLCL – tCLCX ns Low time t CLCX 12 t CLCL – tCHCX ns Rise time t CLCH –12 ns Fall time t CHCL –12 ns |
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