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S93462S2.7 Datasheet(PDF) 11 Page - Summit Microelectronics, Inc. |
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S93462S2.7 Datasheet(HTML) 11 Page - Summit Microelectronics, Inc. |
11 / 14 page 11 S93462/S93463 2021 4.2 1/23/01 Summit Microelectronics, Inc. Frequently the reset controller will be deployed on a PC board that provides a peripheral function to a system. Examples might be modem or network cards in a PC or a PCMCIA card in a laptop. In instances like this the peripheral card may have a requirement for a clean reset function to insure proper operation. The system may or may not provide a reset pulse of sufficient duration to clear the peripheral or to protect data stored in a nonvolatile memory. The I/O capability of the RESET pins can provide a solution. The system’s reset signal to the peripheral can be fed into the S93462/463 and it in turn can clean up the signal and provide a known entity to the peripheral’s circuits. The figure below shows the basic timing characteristics under the assumption the reset input is shorter in duration than tPURST. The same reset output affect can be attained by using the active high reset input. When planning your resistor pull-up and pull-down values, use the following chart to help determine min. resistances. Condition Min Typ Max Units VCC = 1.0V, IOL=100µA 0.3 V VCC = 1.2V, IOL=100µA 0.3 V VCC = 3.0V, IOL=500µA 0.3 V VCC = 3.6V, IOL=500µA 0.3 V VCC = 4.5V, IOL=750µA 0.3 V VCC = 1.0V, IOL=100µA 0.4 V VCC = 1.2V, IOL=150µA 0.4 V VCC = 3.0V, IOL=750µA 0.4 V VCC = 3.6V, IOL=1mA 0.4 V VCC = 4.5V, IOL=1mA 0.4 V VCC = 1.0V, IOH=400µA VCC-0.75 V VCC = 1.2V, IOH=800µA VCC-0.75 V VCC = 3.0V, IOH=800µA VCC-0.5 V VCC = 3.6V, IOH=800µA VCC-0.5 V VCC = 4.5V, IOH=800µA VCC-0.5 V Worst Case RESET Sink/Source Capabilities at Various VCC Levels Parameter Symbol RESET# Output VOL Voltage RESET# Output VOL Voltage RESET Output VOH Voltage 2021 PGM T5 1.0 RESET# Input RESET# Output RESET Output 2021 T fig09 2.0 t PURST |
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