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CAT28C257HNI-90T Scheda tecnica(PDF) 4 Page - Catalyst Semiconductor |
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CAT28C257HNI-90T Scheda tecnica(HTML) 4 Page - Catalyst Semiconductor |
4 / 10 page CAT28C257 4 Doc. No. 25073-00 2/98 Advanced MODE SELECTION Mode CE WE OE I/O Power Read L H L DOUT ACTIVE Byte Write (WE Controlled) L H DIN ACTIVE Byte Write (CE Controlled) L H DIN ACTIVE Standby, and Write Inhibit H X X High-Z STANDBY Read and Write Inhibit X H H High-Z ACTIVE CAPACITANCE TA = 25°C, f = 1.0 MHz, VCC = 5V Symbol Test Max. Units Conditions CI/O(1) Input/Output Capacitance 10 pF VI/O = 0V CIN(1) Input Capacitance 6 pF VIN = 0V Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) Output floating (High-Z) is defined as the state when the external data line is no longer driven by the output buffer. 28C257-90 28C257-12 28C257-15 Symbol Parameter Min. Max. Min. Max Min. Max. Units tRC Read Cycle Time 90 120 150 ns tCE CE Access Time 90 120 150 ns tAA Address Access Time 90 120 150 ns tOE OE Access Time 40 50 70 ns tLZ(1) CE Low to Active Output 0 0 0 ns tOLZ(1) OE Low to Active Output 0 0 0 ns tHZ(1)(2) CE High to High-Z Output 40 50 50 ns tOHZ(1)(2) OE High to High-Z Output 40 50 50 ns tOH(1) Output Hold from Address Change 0 0 0 ns A.C. CHARACTERISTICS, Read Cycle VCC=5V + 10%, Unless otherwise specified Symbol Parameter Min. Max. Units tPUR Power-Up to Read 100 µs tPUW Power-Up to Write 5 10 ms Power-Up Timing |
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