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посоветуйте где нить взять компаратор
форм не важен
в старых ноутах
натипа
The MAX9060–MAX9064 are small single comparators,
ideal for a wide variety of portable electronics applications
such as cell phones, media players, and notebooks that
have extremely tight board space and power constraints.
These comparators are offered in both, a miniature
4-bump UCSP™ package with a 1mm x 1mm footprint (as
small as two 0402 resistors), and a 5-pin SOT23 package.
The MAX9060–MAX9064 feature an input voltage range
of -0.3V to +5.5V independent of supply voltage. These
devices maintain high impedance at the inputs even when
powered down (VCC or VREF = 0V). They also feature
internal filtering to provide high RF immunity.
The MAX9060 and MAX9061 have open-drain outputs and
draw quiescent supply current from a user-supplied reference
voltage, VREF, between 0.9V and 5.5V. These devices
consume only 100nA (max) supply current and operate
over the extended -40°C to +85°C temperature range.
The MAX9062, MAX9063 and MAX9064 are single comparators
with an internal 0.2V reference. These devices
feature either a push-pull or an open-drain output. They
consume only 700nA (max) supply current. The MAX9062,
MAX9063, and MAX9064 operate down to VCC = 1V over
the extended -40°C to +85°C temperature range.