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M29W400T Datasheet(PDF) 21 Page - STMicroelectronics |
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M29W400T Datasheet(HTML) 21 Page - STMicroelectronics |
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21 / 34 page  Symbol Alt Parameter M29W400T / M29W400B Unit -120 -150 VCC = 2.7V to 3.6V VCC = 2.7V to 3.6V Min Max Min Max tAVAV tWC Address Valid to Next Address Valid 120 150 ns tWLEL tWS Write Enable Low to Chip Enable Low 0 0 ns tELEH tCP Chip Enable Low to Chip Enable High 50 50 ns tDVEH tDS Input Valid to Chip Enable High 50 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 30 35 ns tAVEL tAS Address Valid to Chip Enable Low 0 0 ns tELAX tAH Chip Enable Low to Address Transition 50 50 ns tGHEL Output Enable High Chip Enable Low 0 0 ns tVCHWL tVCS VCC High to Write Enable Low 50 50 µs tEHGL tOEH Chip Enable High to Output Enable Low 0 0 ns tPHPHH (1,2) tVIDR RP Rise TIme to VID 500 500 ns tPLPX tRP RP Pulse Width 500 500 ns tEHRL (1) tBUSY Program Erase Valid to RB Delay 90 90 ns tPHWL (1) tRSP RP High to Write Enable Low 4 4 µs Notes: 1. Sample only, not 100% tested. 2. This timing is for Temporary Block Unprotection operation. Table 16B. Write AC Characteristics, Chip Enable Controlled (TA = 0 to 70 °C, –20 to 85°C or –40 to 85°C) Erase Resume (ER) Instruction. If an Erase Sus- pend instruction was previously executed, the erase operation may be resumed by giving the command 30h, at any address, and without any Coded cycles. POWER SUPPLY Power Up The memory Command Interfaceis 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 edge of E and 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 decoupled with a 0.1 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. 21/34 M29W400T, M29W400B |
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