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LP2901-Q1 データシート(PDF) 5 Page - Texas Instruments |
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LP2901-Q1 データシート(HTML) 5 Page - Texas Instruments |
5 / 8 page www.ti.com LP2901-Q1 LOW-POWER QUAD DIFFERENTIAL COMPARATOR SLCS148 – SEPTEMBER 2005 Without transistor Q3, if the output voltage were allowed to drop below 0.8 V, transistor Q1 would saturate, and the output current would drop to zero. The circuit would be unable to pull low current loads down to ground or the negative supply, if used. Transistor Q3 has been included to bypass transistor Q1 under these conditions and apply the current I 1 directly to the base of Q2. The output sink current now is approximately I1 times the hFE of Q2 (700 µA at V O = 0.4 V). The output of the devices exhibits a bimodal characteristic, with a smooth transition between modes. In both cases, the output is an uncommitted collector. Several outputs can be tied together to provide a dot logic function. An output pullup resistor can be connected to any available power-supply voltage within the permitted power-supply range, and there is no restriction on this voltage, based on the magnitude of the voltage that is supplied to VCC of the package. 5 |
同様の部品番号 - LP2901-Q1 |
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同様の説明 - LP2901-Q1 |
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