TC4404_13 datasheet(2/18 Pages) MICROCHIP

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TC4404/TC4405

DS21418D-page 2

 2002-2012 Microchip Technology Inc.

Because neither drain in an output is dependent on the

other, these devices can also be used as open-drain

buffer/drivers where both drains are available in one

device, thus minimizing chip count. Unused open

drains should be returned to the supply rail that their

device sources are connected to (pull-downs to

ground, pull-ups to VDD), to prevent static damage. In

addition, in situations where timing resistors or other

means of limiting crossover currents are used, like

drains may be paralleled for greater current carrying

capacity.

These devices are built to operate in the most demand-

ing electrical environments. They will not latch-up

under any conditions within their power and voltage

ratings; they are not subject to damage when up to 5V

of noise spiking of either polarity occurs on their ground

pin; and they can accept, without damage or logic

upset, up to 1/2 amp of reverse current (of either

polarity) being forced back into their outputs. All

terminals are fully protected against up to 2 kV of

electrostatic discharge.

Functional Block Diagram

Input

GND

Effective

Input

C ≤ 12 pF

300 mV

VDD

Pull-Up

Pull-Down

2 (3)

A (B)

8 (6)

7 (5)

TC4404

Inverting

TC4405

Noninverting

4.7V

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