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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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PC87373 数据表(PDF) 162 Page - National Semiconductor (TI) |
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PC87373 数据表(HTML) 162 Page - National Semiconductor (TI) |
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162 / 174 page  13.0 Device Characteristics (Continued) 162 www.national.com Revision 1.1 Low-Frequency Clock Timing Figure 53. CLOCKI32 Timing Symbol Figure Clock Input Parameters Reference Conditions CLOCKI32 Units Min Typ Max tCP 53 Clock Period1 (50%-50%) 1. Not tested. Guaranteed by design. 30.4871 30.517578 30.5481 µs FCK − Clock Frequency F32TYP − 0.1% 32.768 (F32TYP) F32TYP + 0.1% KHz t32KW 53 Clock wake-up time VSB3 stable to clock start toggling System dependent2 2. If t32KW of the CLOCKI32 input is lower than 0.5 ms, use the 0.5 ms value in calculations involving the total wake-up time of the low-frequency clock (t32KW + t32KVAL). t32KVAL 53 Clock valid time1 Clock start toggling to clock valid 256 * tCP CLOCKI32 (32.768 KHz) t32KW VSB3 (Power) VSB3ONmin tCP t32KVAL (Internal) 32 KHz Domain |
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