4-251

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

1.5A DUAL HIGH-SPEED POWER MOSFET DRIVERS

TC4426A

TC4427A

TC4428A

GENERAL DESCRIPTION

The TC4426A/4427A/4428A are improved versions of

the earlier TC426/427/428 family of buffer/drivers (with

which they are pin compatible). 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 the ground pin. They can accept,

without damage or logic upset, up to 500 mA of reverse

current (of either polarity) being forced back into their

outputs. All terminals are fully protected against up to 4 kV

of electrostatic discharge.

As MOSFET drivers, the TC4426A/4427A/4428A can

easily switch 1000 pF gate capacitances in under 30 ns, and

provide low enough impedances in both the ON and OFF

states to ensure the MOSFET's intended state will not be

affected, even by large transients.

2 mA

OUTPUT

INPUT

GND

EFFECTIVE INPUT

C = 12 pF

300 mV

INVERTING

OUTPUTS

NONINVERTING

OUTPUTS

TC4426A/TC4427A/TC4428A

4.7V

NOTES: 1. TC4426A has 2 inverting drivers; TC4427A has 2 noninverting drivers.

2. TC4428A has one inverting and one noninverting driver.

3. Ground any unused driver input.

PIN CONFIGURATIONS

TC4426A

1

2

3

4

NC

5

6

7

8

OUT A

OUT B

NC

IN A

GND

IN B

NC = NO INTERNAL CONNECTION

TC4427A

1

2

3

4

NC

5

6

7

8

OUT A

OUT B

NC

IN A

GND

IN B

TC4428A

1

2

3

4

NC

5

6

7

8

OUT A

OUT B

NC

IN A

GND

IN B

2,4

7,5

INVERTING

2,4

7,5

NONINVERTING

VDD

2

4

DIFFERENTIAL

7

5

VDD

NOTE: SOIC pinout is identical to DIP.

FEATURES

s

High Peak Output Current ............................... 1.5A

s

Wide Operating Range .......................... 4.5V to 18V

s

High Capacitive Load

Drive Capability ................. 1000 pF in 25 nsec Typ

s

Short Delay Time ................................. 30 nsec Typ

s

Matched Rise, Fall and Delay Times

s

Low Supply Current

— With Logic “1” Input ............................ 1 mA Typ

— With Logic “0” Input ......................... 100

s

Low Output Impedance ................................ 7

s

Latch-Up Protected: Will Withstand 0.5A

Reverse Current

s

Input Will Withstand Negative Inputs Up to 5V

s

ESD Protected .................................................... 4 kV

s

Pinout Same as TC426/TC427/TC428

ORDERING INFORMATION

Part No.

Package

Temp. Range

TC4426ACOA

8-Pin SOIC

0

°C to +70°C

TC4426ACPA

8-Pin Plastic DIP

0

°C to +70°C

TC4426AEOA

8-Pin SOIC

– 40

°C to +85°C

TC4426AEPA

8-Pin Plastic DIP

– 40

°C to +85°C

TC4426AMJA

8-Pin CerDIP

– 55

°C to +125°C

TC4427ACOA

8-Pin SOIC

0

°C to +70°C

TC4427ACPA

8-Pin Plastic DIP

0

°C to +70°C

TC4427AEOA

8-Pin SOIC

– 40

°C to +85°C

TC4427AEPA

8-Pin Plastic DIP

– 40

°C to +85°C

TC4427AMJA

8-Pin CerDIP

– 55

°C to +125°C

TC4428ACOA

8-Pin SOIC

0

°C to +70°C

TC4428ACPA

8-Pin Plastic DIP

0

°C to +70°C

TC4428AEOA

8-Pin SOIC

– 40

°C to +85°C

TC4428AEPA

8-Pin Plastic DIP

– 40

°C to +85°C

TC4428AMJA

8-Pin CerDIP

– 55

°C to +125°C

TC4426A/7A/8A-9 10/21/96

FUNCTIONAL BLOCK DIAGRAM