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CAT812STBI-GT10 Datasheet(PDF) 7 Page - ON Semiconductor |
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CAT812STBI-GT10 Datasheet(HTML) 7 Page - ON Semiconductor |
7 / 11 page CAT811, CAT812 VALID RESET WITH V UNDER 1.0V CC To ensure that the CAT811 RESET ¯¯¯¯¯¯ pin is in a known state when VCC is under 1.0V, a 100kΩ pull-down resistor between RESET ¯¯¯¯¯¯ pin and GND is recommended; the value is not critical. For the CAT812, a pull-up resistor from RESET pin to VCC is needed. Figure 3. RESET ¯¯¯¯¯¯ Valid with VCC under 1.0V VCC GND 100kΩ CAT811 MR RESET Power Supply VCC GND 100kΩ CAT812 MR RESET Power Supply Figure 4. RESET Valid with VCC under 1.1V BI-DIRECTIONAL RESET PIN INTERFACING The CAT811/812 can interface with µP/µC bi- directional reset pins by connecting a 4.7kΩ resistor in series with the CAT811/812 reset output and the µP/µC bi-directional reset pin. GND 4.7kΩ CAT811 CAT811 MR GND BUF RESET INPUT RESET RESET Power Supply µP (for example: 68HC11) Buffered Bi-directional I/O Pin VCC Figure 5. Bi-directional Reset Pin Interfacing © 2010 SCILLC. All rights reserved. 7 Doc. No. MD-3005 Rev. U Characteristics subject to change without notice |
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