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전자부품 데이터시트 검색엔진 |
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Q67127-C1014 데이터시트(PDF) 37 Page - Siemens Semiconductor Group |
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Q67127-C1014 데이터시트(HTML) 37 Page - Siemens Semiconductor Group |
37 / 48 page ![]() Semiconductor Group 37 1997-04-01 C501 AC Characteristics for C501-L40 / C501-1R40 V CC = 5 V + 10 %, – 15 %; VSS = 0 V T A = 0 ˚C to 70 ˚C for the SAB-C501 T A = – 40 ˚C to 85 ˚C for the SAF-C501 ( C L for port 0, ALE and PSEN outputs = 100 pF; CL for all other outputs = 80 pF) Program Memory Characteristics *) Interfacing the C501 to devices with float times up to 25ns is permissible. This limited bus contention will not cause any damage to port 0 Drivers. Parameter Symbol Limit Values Unit 40 MHz Clock Variable Clock 1/ t CLCL = 3.5 MHz to 40 MHz min. max. min. max. ALE pulse width t LHLL 35 – 2 t CLCL– 15 – ns Address setup to ALE t AVLL 10 – t CLCL– 15 – ns Address hold after ALE t LLAX 10 – t CLCL– 15 – ns ALE low to valid instr in t LLIV –55 – 4 t CLCL– 45 ns ALE to PSEN t LLPL 10 – t CLCL– 15 – ns PSEN pulse width t PLPH 60 – 3 t CLCL– 15 – ns PSEN to valid instr in t PLIV –25 – 3 t CLCL– 50 ns Input instruction hold after PSEN t PXIX 0–0 – ns Input instruction float after PSEN t PXIZ *) –20 – t CLCL– 5 ns Address valid after PSEN t PXAV *) 20 – t CLCL– 5 – ns Address to valid instr in t AVIV –65 – 5 t CLCL– 60 ns Address float to PSEN t AZPL – 5 – – 5 – ns |
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