TC429 datasheet(7/18 Pages) MICROCHIP

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 2003 Microchip Technology Inc.

DS21416C-page 7

TC429

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Supply Input (VDD)

The VDD input is the bias supply for the MOSFET driver

and is rated for 7.0V to 18V with respect to the ground

pin. The VDD input should be bypassed to ground with

a local ceramic capacitor. The value of the capacitor

should be chosen based on the capacitive load that is

being driven. A value of 1.0 µF is suggested.

3.2

Control Input (INPUT)

The MOSFET driver input is a high-impedance,

TTL/CMOS compatible input. The input also has

300 mV of hysteresis between the high and low thresh-

olds that prevents output glitching even when the rise

and fall time of the input signal is very slow.

3.3

CMOS Push-Pull Output

(OUTPUT)

The MOSFET driver output is a low-impedance, CMOS

push-pull style output, capable of driving a capacitive

load with 6.0A peak currents.

3.4

Ground (GND)

The ground pins are the return path for the bias current

and for the high peak currents that discharge the load

capacitor. The ground pins should be tied into a ground

plane or have very short traces to the bias supply

source return.

3.5

No Connect (NC)

No connection.

Pin No.

Symbol

Description

1VDD

Supply input, 7V to 18V

INPUT

Control input. TTL/CMOS compatible logic input

No connection

GND

Ground

GND

Ground

6OUTPUT

CMOS push-pull output, common to pin 7

7OUTPUT

CMOS push-pull output, common to pin 6

8VDD

Supply input, 7V to 18V

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