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TA31275FN 数据表(PDF) 8 Page - Toshiba Semiconductor |
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TA31275FN 数据表(HTML) 8 Page - Toshiba Semiconductor |
8 / 25 page TA31275FN/ TA31275FNG 03-01-23 8 12. Control Terminal for Quick Charge Circuit (CHARGE) CHARGE (15 pin) is control terminal for quick charge circuit. REF (20 pin) control terminal for quick charge a given period by time constant of internal resistance and outside capacitance. Enabling the CHARGE pin requires an external capacitor. In normal operation, connect a capacitor having the same capacitance as that of the capacitor connected to the REF pin (pin 20). If the connected external capacitor (C11) is 0.1 µF, the quick charge time is 7 ms (typically). 13. Bit Rate Filter for FM The current FM bit rate filter is used as a tertiary filter. If the filter is to be used at a rate other than 1200 bps, please change the filter constant. Quadratic Filter (NRZ) R10 R9 R8 C20 C19 C18 1200 bps 68 k Ω 68 k Ω 68 k Ω 0.01 µF 560 pF 3300 pF 2400 bps 68 k Ω 68 k Ω 68 k Ω 4700 pF 270 pF 1500 pF 4800 bps 68 k Ω 68 k Ω 68 k Ω 2200 pF 150 pF 680 pF 14. Bit Rate Filter for AM The current AM bit rate filter is used as a quadratic filter. If the filter is to be used at a rate other than 1200 bps, please change the filter constant. Quadratic Filter (NRZ) (the bit rate filter time constant takes into account the internal resistance RSSI (30 k Ω)) R R10 C20 C19 1200 bps 36 k Ω 68 k Ω 4700 pF 1500 pF 2400 bps 36 k Ω 68 k Ω 2200 pF 680 pF 4800 bps 36 k Ω 68 k Ω 1000 pF 390 pF When the filter constants shown below are used, it is not necessary to set the R constant value. R R10 C20 C19 1200 bps 30 k Ω 6800 pF 2200 pF 2400 bps 30 k Ω 3300 pF 1500 pF 4800 bps 30 k Ω 1800 pF 820 pF In addition, the current AM bit rate filter can be used as a tertiary filter. If the filter is to be used at a rate other than 1200 bps, please change the filter constant. |
类似零件编号 - TA31275FN |
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类似说明 - TA31275FN |
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