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AT89C51-20AC Datasheet(PDF) 9 Page - ATMEL Corporation |
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AT89C51-20AC Datasheet(HTML) 9 Page - ATMEL Corporation |
9 / 15 page AT89C51 4-37 Absolute Maximum Ratings* DC Characteristics TA = -40°C to 85°C, VCC = 5.0V ± 20% (unless otherwise noted) Notes: 1. Under steady state (non-transient) conditions, IOL must be externally limited as follows: Maximum IOL per port pin: 10 mA Maximum IOL per 8-bit port: Port 0: 26 mA Ports 1, 2, 3: 15 mA Maximum total IOL for all output pins: 71 mA If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions. 2. Minimum VCC for Power Down is 2V. Operating Temperature .................................. -55°C to +125°C *NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent dam- age to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Storage Temperature ..................................... -65°C to +150°C Voltage on Any Pin with Respect to Ground .....................................-1.0V to +7.0V Maximum Operating Voltage............................................. 6.6V DC Output Current...................................................... 15.0 mA Symbol Parameter Condition Min Max Units VIL Input Low Voltage (Except EA)-0.5 0.2 VCC - 0.1 V VIL1 Input Low Voltage (EA)-0.5 0.2 VCC - 0.3 V VIH Input High Voltage (Except XTAL1, RST) 0.2 VCC + 0.9 VCC + 0.5 V VIH1 Input High Voltage (XTAL1, RST) 0.7 VCC VCC + 0.5 V VOL Output Low Voltage(1) (Ports 1,2,3) IOL = 1.6 mA 0.45 V VOL1 Output Low Voltage(1) (Port 0, ALE, PSEN) IOL = 3.2 mA 0.45 V VOH Output High Voltage (Ports 1,2,3, ALE, PSEN) IOH = -60 µA, VCC = 5V ± 10% 2.4 V IOH = -25 µA 0.75 VCC V IOH = -10 µA0.9 VCC V VOH1 Output High Voltage (Port 0 in External Bus Mode) IOH = -800 µA, VCC = 5V ± 10% 2.4 V IOH = -300 µA 0.75 VCC V IOH = -80 µA0.9 VCC V IIL Logical 0 Input Current (Ports 1,2,3) VIN = 0.45V -50 µA ITL Logical 1 to 0 Transition Current (Ports 1,2,3) VIN = 2V, VCC = 5V ± 10% -650 µA ILI Input Leakage Current (Port 0, EA)0.45 < VIN < VCC ±10 µA RRST Reset Pulldown Resistor 50 300 K Ω CIO Pin Capacitance Test Freq. = 1 MHz, TA = 25°C 10 pF ICC Power Supply Current Active Mode, 12 MHz 20 mA Idle Mode, 12 MHz 5 mA Power Down Mode(2) VCC = 6V 100 µA VCC = 3V 40 µA |
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