поискавой системы для электроныых деталей |
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BA7149F датащи(PDF) 7 Page - Rohm |
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BA7149F датащи(HTML) 7 Page - Rohm |
7 / 7 page 7 Video ICs BA7149F •Operation notes (1) H.OSC free-run frequency and capture range The free-run frequency is determined by the 115k Ω resistor connected between pin 15 and GND. The cap- ture range is varied by the resistors and capacitor con- nected to pins 14 and 15. The free-run frequency and capture range for this IC are guaranteed for these circuit constant values, and we recommend that you use them. The resistor 115k Ω connected between pin15 and GND should have a tol- erance of ± 2%, and a temperature coefficient of ± 100ppm or lower. (2) V.OSC free-run frequency The V.OSC free-run frequency is determined by the 15k Ω resistor connected between pin 6 and GND, and the 0.1 µF capacitor connected between pin 7 and GND. The free-run frequency and capture range for this IC are guaranteed for these circuit constant values, and we recommend that you use them. The resistor 15k Ω connected between pin 6 and GND should have a tol- erance of ± 2%, and a temperature coefficient of ± 100ppm or lower, and the capacitor connected between pin 7 and GND should have a tolerance of ± 5%, and a temperature coefficient of ± 250ppm or lower. (3) Use with PAL systems In PAL systems, change the value of the resistor con- nected between pin 6 and GND to 18k Ω. (4) PCB pattern The large-signal systems and small-signal systems in the IC have been kept separate, and the external wring must also be done in such a way to prevent interfer- ence from occurring. In particular, to prevent the FBT return current from interfering with the V. OSC circuit on pins 6 and 7, do not directly connect the pin 4 GND and pin 6 and 7 GND. 1 16 2 3 4 5 6 7 8 9 10 11 12 13 14 15 G FBT VCC ∗ Do not connect pin 4 GND to pin 6 and 7 GND. Fig.14 •External dimensions (Units: mm) SOP16 0.4 ± 0.1 1.27 0.15 0.3Min. 1 16 10.0 ± 0.2 8 9 |
Аналогичный номер детали - BA7149F |
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Аналогичное описание - BA7149F |
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