4-213

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TC4403

APPLICATIONS

s

Isolated Load Drivers

s

Pulsers

s

Safety Interlocks

ORDERING INFORMATION

Temperature

Part No.

Package

Range

TC4403CPA

8-Pin PDIP

0

°C to 70°C

TC4403EPA

8-Pin PDIP

– 40

°C to +85°C

TC4403MJA

8-Pin CerDIP

– 55

°C to +125°C

FUNCTIONAL BLOCK DIAGRAM

PIN CONFIGURATION

(TOP VIEW)

18

27

36

45

TC4403

OUT (GND)

IN (GND)

GND

IN (VDD)

VDD

OUT (VDD)

NC

NC

FEATURES

s

Low Quiescent Current ......................... 300

s

Capacitive Inputs With 300mV Hysteresis

s

Both Inputs Must Be Driven to Drive Load

s

Low Output Leakage

s

High Peak Current Capability

s

Fast Output Rise Time

s

Outputs Individually Testable

GENERAL DESCRIPTION

The TC4403 is a modified version of the TC4425 driver,

intended to drive floating or isolated loads requiring high-

current pulses. The load is intended to be connected be-

tween the outputs without other reference to supply or

are energized, is power supplied to the load. This construc-

tion allows the implementation of a wide variety of redundant

input controllers.

The low OFF-state output leakage and independence of

the two half-circuits permit a wide variety of testing schemes

to be utilized to assure functionality. The high peak current

capability, short internal delays, and fast output rise and fall

times ensure that sufficient power will be available to the

load when it is needed. The TTL and CMOS compatible

inputs allow operation from a wide variety of input devices.

The ability to swing the inputs negative without affecting

device performance allows negative biases to be placed on

the inputs for greater safety. In addition, the capacitive

nature of the inputs allows the use of series resistors on the

inputs for extra noise suppression.

The TC4403 is built for outstanding ruggedness and

reliability in harsh applications. Input voltage excursions

above the supply voltage or below ground are clamped

internally without damaging the device. The output stages

are power MOSFETs with high-speed body diodes to pre-

vent damage to the driver from inductive kickbacks.

1.5A HIGH-SPEED, FLOATING LOAD DRIVER

TC4403

300mV INPUT

HYSTERESIS

EFFECTIVE INPUT

C = 20pF

(EACH INPUT)

GND

IN (VDD)

IN (GND)

4

2

3

OUT (VDD)

OUT (GND)

VDD

6

7

5

TC4403-6 10/11/96