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PC87413 датащи(PDF) 240 Page - National Semiconductor (TI) |
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PC87413 датащи(HTML) 240 Page - National Semiconductor (TI) |
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240 / 257 page ![]() 11.0 Device Characteristics (Continued) www.national.com 240 Revision1.2 VDD Power-Up Reset Figure 58. Internal VDD Power-Up Reset Hardware Reset Figure 59. Hardware Reset Symbol Figure Description Reference Conditions Min1 1. Not tested. Guaranteed by design. Max1 tLRST 58 Minimum LRESET active time Power stable to end of LRESET 2048 * t32KOSC tIRST 58 Internal Power-Up reset time Power stable to end of internal reset 8192 * t32KOSC 8704 * t32KOSC tIPLV 58 Internal strap pull-down resistors, valid time2 2. Active on VDD Power-Up reset only. Before end of internal reset 512 * t32KOSC tIRST tEPLV 58 External strap pull-up resistors, valid time Before end of internal reset 512 * t32KOSC tIRST Symbol Figure Description Reference Conditions Min Max tWRST 59 LRESET pulse width 100 ns VDD (Power) 32 KHz Clock (Internal) tIRST Internal Straps tIPLV VDDONmin External Straps tEPLV t32KOSC (Internal) (Pull-Down) (Pull-Up) LRESET VDD Power-Up Reset tLRST Internal Clock LRESET tWRST |
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