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AT27C256R-70PU Datasheet(PDF) 4 Page - ATMEL Corporation |
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AT27C256R-70PU Datasheet(HTML) 4 Page - ATMEL Corporation |
4 / 14 page 4 0014O–EPROM–10/11 Atmel AT27C256R Table 5-3. DC and operating characteristics for read operation Notes: 1. V CC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP. 2. V PP may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC and I PP. Table 5-4. AC characteristics for read operation Note: 1. See AC waveforms for read operation. Symbol Parameter Condition Min Max Units I LI Input load current V IN = 0V to VCC Ind. ±1 µA Auto. ±5 µA I LO Output leakage current V OUT = 0V to VCC Ind. ±5 µA Auto. ±10 µA I PP1 (2) V PP (1) read/standby current V PP = VCC 10 µA I SB V CC (1) standby current I SB1 (CMOS), CE = VCC 0.3V 100 µA I SB2 (TTL), CE = 2.0 to VCC + 0.5V 1 mA I CC V CC active current f = 5MHz, I OUT = 0mA, E = VIL 20 mA V IL Input low voltage -0.6 0.8 V V IH Input high voltage 2.0 V CC + 0.5 V V OL Output low voltage I OL = 2.1mA 0.4 V V OH Output high voltage I OH = -400µA 2.4 V Symbol Parameter Condition Atmel AT27C256R Units -45 -70 Min Max Min Max t ACC (1) Address to output delay CE = OE = V IL 45 70 ns t CE (1) CE to output delay OE = V IL 45 70 ns t OE (1) OE to output delay CE = V IL 20 30 ns t DF (1) OE or CE high to output float, whichever occurred first 20 25 ns t OH Output hold from address, CE or OE, whichever occurred first 77 ns |
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