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U634H256D1K25 Datasheet(PDF) 6 Page - Zentrum Mikroelektronik Dresden AG |
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U634H256D1K25 Datasheet(HTML) 6 Page - Zentrum Mikroelektronik Dresden AG |
6 / 14 page 6 April 21, 2004 U634H256 L- to H-level undefined H- to L-level i: If W is LOW and when E goes LOW, the outputs remain in the high impedance state. j: E or W must be VIH during address transition. Write Cycle #1: W-controlledj Write Cycle #2: E-controlledj th(D) Ai E W DQi Input DQi Output tcW tsu(E) th(A) tw(W) tsu(D) tdis(W) ten(W) Address Valid Input Data Valid High Impedance tsu(A-WH) (12) (16) (13) (19) (20) (23) (21) tsu(A) th(D) Ai E W DQi Input DQi Output tcW tw(E) th(A) tsu(D) Input Data Valid tsu(W) (12) (18) (21) (20) (19) (17) (22) Previous Data (15) (14) High Impedance (15) tsu(A) Address Valid |
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