TC4404COA datasheet(2/16 Pages) MICROCHIP

2 / 16 page

TC4404/TC4405

DS21418B-page 2

 2002 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 2kV of electrostatic discharge.

Functional Block Diagram

Input

GND

Effective

Input

≤ 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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