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MSM548512L-XXGS-K Datasheet(PDF) 6 Page - OKI electronic componets |
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MSM548512L-XXGS-K Datasheet(HTML) 6 Page - OKI electronic componets |
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6 / 12 page  ¡ Semiconductor MSM548512L 6/12 AC Characteristics Measurement condition: Input pulse level ........................... VIH = 2.4 V, VIL = 0.4 V Output reference level .................. VOH = 2.0 V, VOL = 0.8 V Rising and falling time ................. 5 ns Output load .................................... 1 TTL + 100 pF Input timing reference level ........ High = 2.2 V, Low = 0.8 V Parameter Symbol MSM548512L -12 Note tRC Random Read Write Cycle Time 210 Max. Min. — Unit ns MSM548512L -10 180 Max. Min. — MSM548512L -80 160 Max. Min. — tRWC Random Read Modify Write Cycle Time 280 — ns 240 — 220 — tCEA CE Access Time — 120 ns — 100 —80 tOEA OE Access Time —50 ns —30 —30 tCHZ Chip Disable to Output in High-Z 6 —30 ns —30 —25 tCLZ CE to Output in Low-Z 20 — ns 20 — 20 — tOHZ OE Disable to Output in High-Z 6 —30 ns —25 —25 tOLZ OE Output in Low-Z 0— ns 0— 0— tCE CE Pulse Width 120n 10m s 100n 10m 80n 10m tP CE Precharge Time 80 — ns 70 — 70 — tAS Address Set-up Time 0— ns 0— 0— tAH Address Hold Time 30 — ns 25 — 20 — tRCS Read Command Set-up Time 0— ns 0— 0— tRCH Read Command Hold Time 0— ns 0— 0— tWP Write Command Pulse Width 35 — ns 30 — 25 — tCW Chip Enable Time 120 — ns 100 — 80 — tDW Input Data Set Time 30 — ns 25 — 20 — tDH Input Data Hold Time 0— ns 0— 0— tOW Output Active from End of Write 5— ns 5— 5— tWHZ Write Enable to Output in High-Z 6 —30 ns —25 —20 tT Transition Time 11 350 ns 350 350 tRFD RFSH Delay Time from CE 80 — ns 70 — 70 — tFP RFSH Precharge Time 40 — ns 40 — 40 — tFAP RFSH Pulse Width (Auto-refresh) 80n 8m s 80n 8m 80n 8m tFC Auto-refresh Cycle Time 210 — ns 180 — 160 — tOHC OE Command Hold Time 15 — ns 15 — 15 — tOCD OE Delay Time 0— ns 0— 0— tFAS 8— ms 8— 8— tRFS CE Delay Time from RFSH in Self-refresh Mode 600 — ns 600 — 600 — tREF Refresh Period (2048 cycle/32 ms) —32 ms —32 —32 (VCC = 5 V ±10%, Ta = 0°C to 70°C) RFSH Pulse Width (Self-refresh) |
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