BU9252F Rohm, BU9252F Datasheet
BU9252F
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BU9252F Summary of contents
Page 1
... Audio digital delay (KARAOKE echo) BU9252S / BU9252F The BU9252S and BU9252F are digital delays specifically for Karaoke systems. Each has an internal sample hold circuit, an 8-bit and converter and 2kB SRAM, and allows for the selection of one of eight delay times just by attaching an inexpensive ceramic resonator. ...
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... Analog circuit power supply DD 6 DCNT0 Delay setting input 7 DCNT1 Delay setting input 8 DCNT2 Delay setting input 9 GND Digital circuit ground 2 BU9252S / BU9252F Pin No. Pin name Function 10 OSCO Oscillator pin 2 11 OSCI Oscillator pin 1 12 TDO1 Test pin (output) 13 TDO0 Test pin (output) ...
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... Multimedia ICs • Input / output circuits Pin name Pin No. Internal equivalent circuit TDIN 14 DCNT0 6 DCNT1 7 DCNT2 8 TDO0 13 TDO1 12 TST0 17 TST1 16 TST2 15 BU9252S / BU9252F Pin name Pin No. Internal equivalent circuit OSCI 11 OSCO OUT Built-in 0.875x amplifier as output buffer. + – 3 ...
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... AV DD Min. Typ. Max. Unit — 3 — mA 0.3 0.8 — — 2 — LSB — 0.6 1.2 V 3.8 4.4 — — 150 — pF BU9252S / BU9252F Unit Unit kHz C = 5V) DD Conditions 455kHz AIN DD OSC AOUT AIN AOUT DD AIN 100 – 100 A ...
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... Audio signals compressed by the BA7725S or BA7725FS have their DC component removed coupling capacitor and are then input to pin 2 of BU9252S or BU9252F. At this stage, level deviations occur because the input signal is capacitor-divided by this AC coupling capacitor C28 and by sampling hold capacitor C27 connected to pin 1. ...
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... An oscillator circuit can be configured simply by attach- ing a 455kHz ceramic resonator • External dimensions (Units: mm) BU9252S 19.4 0 1.778 0.5 0.1 SDIP18 6 Delay time (ms) 375kHz 455kHz Min. Max. 21.85 144.04 OSCI OSCO BU9252F 18 7. BU9252S / BU9252F Min. 18.00 11.2 0 1.27 0.4 0.1 0.3Min. 0.15 SOP18 ...