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UPC1678 Datasheet(PDF) 3 Page - NEC |
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UPC1678 Datasheet(HTML) 3 Page - NEC |
3 / 16 page Data Sheet P11491EJ4V0DS00 3 µµµµPC1678G PIN EXPLANATION Pin No. Pin Name Applied Voltage (V) Function and Applications Internal Equivalent Circuit 1 INPUT – Signal input pin. A internal matching circuit, configured with resisters, enables 50 Ω connection over a wide band. A multi-negative feedback circuit is designed to cancel the deviations of hFE and resistance. This pin must be coupled to signal source with capacitor for DC cut. 2 3 4 6 7 GND 0 Ground pin. This pin should be connected to system ground with minimum inductance. Ground pattern on the board should be formed as widely as possible. All the ground pins must be connected together with wide ground pattern to decrease impedance difference. 5 OUTPUT Voltage as same as VCC through external inductor Signal output pin. The inductor must be attached between VCC and output pins to supply current to the internal output transistors. 8VCC 4.5 to 5.5 Power supply pin, which biases the internal input transistors. This pin should be externally equipped with bypass capacitor to minimize its impedance. 5 8 1 IN 6 7 2 4 3 VCC OUT GND GND 2, 3, 4, 6 and 7 are shorted by a lead frame. |
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