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ACE803ND 数据表(PDF) 6 Page - ACE Technology Co., LTD. |
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ACE803ND 数据表(HTML) 6 Page - ACE Technology Co., LTD. |
6 / 9 page ACE803ND 3-Pin Microprocessor Reset Circuits VER 1.1 6 Interfacing to μPs with Bidirectional Reset Pins Since the RESET output on the ACE803ND is open drain, this device interfaces easily with μPs that have bidirectional reset pins, such as the Motorola 68HC11. Connecting the μP supervisor’s RESET output directly to the microcontroller’s (μC’s) RESET pin with a single pull-up resistor allows either device to assert reset (Figure 2) ACE803ND Open-Drain RESET Output Allows Use with Multiple Supplies Benefits of Highly Accurate Reset Threshold Most µP supervisor circuits have reset threshold voltages between 5% and 10% below the value of nominal supply voltages. This ensures a reset will not occur within 5% of the nominal supply, but will occur when the supply is 10% below nominal. When using ICs rated at only the nominal supply ±5%, this leaves a zone of uncertainty where the supply is between 5% and 10% low, and where the reset may or may not be asserted. The ACE803NDL/M/Z use highly accurate circuitry to ensure that reset is asserted close to the 5% limit, and long before the supply has declined to 10% below nominal. Figure 2. Interfacing to μPs with Bidirectional Reset I/O Figure 3. ACE803ND Open-Drain RESET Output Allows Use with Multiple Supplies |
类似零件编号 - ACE803ND |
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类似说明 - ACE803ND |
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