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AT27C256 Datasheet(PDF) 4 Page - ATMEL Corporation |
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AT27C256 Datasheet(HTML) 4 Page - ATMEL Corporation |
4 / 9 page AC Characteristics for Read Operation AT27C256R -45 -55 -70 -90 -12 -15 Symbol Parameter Condition Min Max Min Max Min Max Min Max Min Max Min Max Units tACC (3) Address to Output Delay CE = OE = VIL 45 55 70 90 120 150 ns tCE (2) CE to Output Delay OE = VIL 45 55 70 90 120 150 ns tOE (2, 3) OE to Output Delay CE = VIL 20 25 30 30 35 40 ns tDF (4, 5) OE or CE High to Output Float, whichever occurred first 20 20 25 25 30 35 ns tOH Output Hold from Address, CE or OE, whichever occurred first 77700 0 ns Notes: 2, 3, 4, 5. - see AC Waveforms for Read Operation. DC and AC Operating Conditions for Read Operation AT27C256R -45 -55 -70 -90 -12 -15 Operating Temp. (Case) Com. 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C Ind. -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C VCC Supply 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% DC and Operating Characteristics for Read Operation Symbol Parameter Condition Min Max Units ILI Input Load Current VIN = 0V to VCC ±1 µA ILO Output Leakage Current VOUT = 0V to VCC ±5 µA IPP1 (2) VPP (1) Read/Standby Current VPP = VCC 10 µA ISB VCC (1) Standby Current ISB1 (CMOS), CE = VCC ± 0.3V 100 µA ISB2 (TTL), CE = 2.0 to VCC + 0.5V 1mA ICC VCC Active Current f = 5 MHz, IOUT = 0 mA, CE = VIL 20 mA VIL Input Low Voltage -0.6 0.8 V VIH Input High Voltage 2.0 VCC + 0.5 V VOL Output Low Voltage IOL = 2.1 mA 0.4 V VOH Output High Voltage IOH = -400 µA 2.4 V Notes: 1. VCC must be applied simultaneously or before VPP, and removed simultaneously or after VPP. 2. VPP may be connected directly to VCC, except during program- ming. The supply current would then be the sum of ICC and IPP. 3-128 AT27C256R |
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