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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M29W040 датащи(PDF) 16 Page - STMicroelectronics |
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M29W040 датащи(HTML) 16 Page - STMicroelectronics |
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16 / 31 page  Symbol Alt Parameter M29W040 Unit -100 -120 VCC = 3.3V ±0.3V CL = 30pF VCC = 3.3V ±0.3V Min Max Min Max tAVAV tWC Address Valid to Next Address Valid 100 120 ns tWLEL tWS Write Enable Low to Chip Enable Low 0 0 ns tELEH tCP Chip Enable Low to Chip Enable High 45 50 ns tDVEH tDS Input Valid to Chip Enable High 45 50 ns tEHDX tDH Chip Enable High to Input Transition 0 0 ns tEHWH tWH Chip Enable High to Write Enable High 0 0 ns tEHEL tCPH Chip Enable High to Chip Enable Low 25 30 ns tAVEL tAS Address Valid to Chip Enable Low 0 0 ns tELAX tAH Chip Enable Low to Address Transition 45 50 ns tGHEL Output Enable High Chip Enable Low 0 0 ns tVCHWL tVCS VCC High to Write Enable Low 50 50 µs tEHQV1 (1) Chip Enable High to Output Valid (Program) 12 12 µs tEHQV2 (1) Chip Enable High to Output Valid (Block Erase) 1.5 30 1.5 30 sec tEHGL tOEH Chip Enable High to Output Enable Low 0 0 ns Note: 1. Time is measured to Data Polling or Toggle Bit, tWHQV =tWHQ7V +tQ7VQV. Table 14A. Write AC Characteristics, Chip Enable Controlled (TA = 0 to 70 °C, –20 to 85°C or –40 to 85°C) Power Up The memory Command Interface is reset on power up to Read Array. Either E or W must be tied to VIH during Power-up to allow maximum security and the possibility to write a command on the first rising adge of E or W. Any write cycle initiation is blocked when VCC is below VLKO. Supply Rails Normal precautions must be taken for supply volt- age decoupling, each device in a system should have the VCC rail decoupledwith a 1.0 µF capacitor close to the VCC and VSS pins. The PCB trace widths should be sufficient to carry the VCC pro- gram and erase currents required. 16/31 M29W040 |
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