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HA12179F Datasheet(PDF) 11 Page - Hitachi Semiconductor |
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HA12179F Datasheet(HTML) 11 Page - Hitachi Semiconductor |
11 / 40 page HA12179F Rev.1, Apr. 1994, page 11 of 40 Operating Mode Control HA12179F provides electronic switching circuits. And each operating mode control are controlled by parallel data (DC voltage). Table 2 Threshold Voltage (V TH) Pin No. Lo Hi Unit Test condition 14 15 16 17 18 19 –0.2 to 1.0 3.5 to 5.3 V Input Pin Measure V Table 3 Switching Truth Table Pin No. Lo Hi 14 NR-OFF NR-ON 15 PB REC 16 MUTE-OFF MUTE-ON 17 120 µ (NORMAL) 70 µ (METAL or CHROME) 18 FORWARD REVERSE 19 SER (FF or REV) REP (NORMAL SPEED) Notes: 1. Each pins are on pulled down with 100 k Ω internal resistor. Therefore, it will be low-level when each pins are open. 2. Over shoot level and under shoot level of input signal must be the standardized (High: 5.3 V, Low: –0.2 V) 3. Reducing pop noise is so much better for 10 k Ω to 22 kΩ resistor and 1 µF to 22 µF capacitor shown Fig 2. But the resistor connected to MUTE terminal (pin 16) should be under 10 k Ω. INPUT Pin 10 to 22k Ω MPU 1 to 22 µF + Figure 2 Interface for Reduction of Pop Noise |
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