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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SM5904CF датащи(PDF) 8 Page - Nippon Precision Circuits Inc |
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SM5904CF датащи(HTML) 8 Page - Nippon Precision Circuits Inc |
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8 / 35 page  NIPPON PRECISION CIRCUITS-8 SM5904CF Parameter Symbol Condition Rating Unit Min Typ Max ZSCK pulsewidth tSCOW 15 pF load 1/96fs ZSCK pulse cycle tSCOY 15 pF load 1/48fs ZSRDATA and ZLRCK output delay time tDHL 15 pF load 0 60 ns tDLH 15 pF load 0 60 ns DRAM access timing (NRAS, NCAS2, NWE, A0 to A9, D0 to D3) Parameter Symbol Condition Rating Unit Min Typ Max NRAS pulsewidth tRASL 15 pF load 5 tCY(note) tRASH 15 pF load 3 tCY NRAS falling edge to NCAS2 falling edge tRCD 15 pF load 2 tCY NCAS2 pulsewidth tCASH 15 pF load 5 tCY tCASL 15 pF load 3 tCY NRAS Setup time tRADS 15 pF load 1 tCY falling edge to address Hold time tRADH 15 pF load 1 tCY NCAS2 Setup time tCADS 15 pF load 1 tCY falling edge to address Hold time tCADH 15 pF load 5 tCY NCAS2 Setup time tCWDS 15 pF load 3 tCY falling edge to data write Hold time tCWDH 15 pF load 3 tCY NCAS2 Input setup tCRDS 40 ns rising edge to data read Input hold tCRDH 0ns NWE pulsewidth tWEL 15 pF load 6 tCY NWE falling edge to NCAS2 falling edge tWCS 15 pF load 3 tCY Refresh cycle Non compression 2.8 ms (fs = 44.1 kHz playback) tREF 4M 6-bit compression 7.3 ms Memory system ON DRAM 5-bit compression 8.8 ms Decode sequence operation(READ=H) × 1 or × 2 4-bit compression 10.9 ms Note. tCY is the system clock (CLK) input (384fs) cycle time. tCY = 59 ns when fs = 44.1 kHz ZSCK ZSRDATA 0.5V DD ZLRCK 0.5V DD DHL t SCOY t SCOW t DLH t SCOW t Serial output (ZSRDATA, ZLRCK, ZSCK pins) |
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