Rainbow-electronics AT28HC256 Manual do Utilizador

1Features• Fast Read Access Time – 70 ns• Automatic Page Write Operation– Internal Address and Data Latches for 64 Bytes– Internal Control Timer• Fast

AT28HC25610

AT28HC25611Ordering Information(1)tACC(ns)ICC (mA)Ordering Code Package Operation RangeActive Standby70 80 60 AT28HC256(E,F)-70JCAT28HC256(E,F)-70PC32

AT28HC25612Note: 1. See “Valid Part Numbers” table on next page.90 80 0.3 5962-88634 03 UX5962-88634 03 XX5962-88634 03 YX5962-88634 03 ZX28U28D632L28

AT28HC25613Ordering Information NotePrevious data sheets included the low power suffixes L, LE and LF on the At28HC256 for 120 ns and 90 ns speeds.The

AT28HC25614Packaging Information1.49(37.9)1.44(36.6)PIN1.610(15.5).510(13.0).098(2.49)MAX.005(.127)MIN.060(1.52).015(.381).023(.584).014(.356).065(1.6

AT28HC25615Packaging Information1.47(37.3)1.44(36.6)PIN1.566(14.4).530(13.5).090(2.29)MAX.005(.127)MIN.065(1.65).015(.381).022(.559).014(.356).065(1.6

© Atmel Corporation 1999.Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standa

AT28HC2562access times to 70 ns with power dissipation of just440 mW. When the AT28HC256 is deselected, the standbycurrent is less than 5 mA.The AT28H

AT28HC2563Device OperationREAD: The AT28HC256 is accessed like a Static RAM.When CE and OE are low and WE is high, the data storedat the memory locati

AT28HC2564Notes: 1. X can be VIL or VIH.2. Refer to AC programming waveforms.3. VH = 12.0V ± 0.5V.DC and AC Operating RangeAT28HC256-70 AT28HC256-90 A

AT28HC2565AC Read Waveforms(1)(2)(3)(4)Notes: 1. CE may be delayed up to tACC - tCE after the address transition without impact on tACC.2. OE may be d

AT28HC2566Note: 1. NR = No Restriction.AC Write WaveformsWE ControlledCE ControlledAC Write CharacteristicsSymbol Parameter Min Max UnitstAS, tOESAddr

AT28HC2567Page Mode Write Waveforms(1)(2)Notes: 1. A6 through A14 must specify the same page address during each high to low transition of WE (or CE).

AT28HC2568Software Data Protection Enable Algorithm(1)Notes for software program code:1. Data Format: I/O7 - I/O0 (Hex);Address Format: A14 - A0 (Hex)

AT28HC2569Notes: 1. These parameters are characterized and not 100% tested.2. See “AC Read Characteristics” on page 5.Data Polling WaveformsNotes: 1.