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Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage.
These comparators also have a unique characteristic in that the input common—mode voltage range includes ground, even though they are operated from a single power supply voltage. When operated from both plus and minus power supplies, the LM series will directly interface with MOS logic where their low power drain is a distinct advantage over standard comparators. Wide single supply voltage range 2. Very low supply current drain 0.
Low input biasing current 25nA? Input common—mode voltage range includes ground? Differential input voltage range equal to the power supply voltage? Low output mV at 4mA saturation voltage? A ? Wide range VCO? MOS clock generator? High voltage logic gate? This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector—base junction of the input PNP transistors becoming forward biased and thereby acting as input diode clamps.
In addition to this diode action, there is also lateral NPN parasitic transistor action on the IC chip. This is not destructive and normal output states will reestablish when the input voltage, which was negative, again returns to a value greater than —0.
Positive excursions of input voltage may exceed the power supply level by 17V. As long as the other voltage remains within the common-mode range, the comparator will provide a proper output state.
The low input voltage state must not be less than —0. Inputs of unused comparators should be grounded. The input common—mode voltage or either input signal voltage should not be allowed to go negative by more than 0. This current is essentially constant, independent of the state of the output so no loading change exists on the reference or input lines.
The response time specified is for a mV input step with a 5mV overdrive. For larger overdrive signals, ns can be obtained see typical performance characteristics section. F 20k? SL Figure 3. Specifications may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified.
Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Printed in U.
Semi-conducteur: LM239N (LM 239N) - V-COMP / 2X36V / 1.3US EXT.T...
LM239: Comparator, Quad, Single Supply, 36 V