5-80

April 1998

MIC4467/4468/4469

Micrel

General Description

The MIC4467/8/9 family of 4-output CMOS buffer/drivers is

an expansion from the earlier single- and dual-output drivers,

to which they are functionally closely related. Because pack-

age pin count permitted it, each driver has been equipped

with a 2-input logic gate for added flexibility. Placing four high-

power drivers in a single package also improves system

reliability and reduces total system cost. In some applica-

tions, one of these drivers can replace not only two packages

of single-input drivers, but some of the associated logic as

well.

Although primarily intended for driving power MOSFETs, and

similar highly capacitive loads, these drivers are equally well

suited to driving any other load (capacitive, resistive, or

inductive), which requires a high-efficiency, low-impedance

driver capable of high peak currents, rail-to-rail voltage swings,

and fast switching times. For example, heavily loaded clock

lines, coaxial cables, and piezoelectric transducers can all be

MIC4467/4468/4469

Quad 1.2A-Peak Low-Side MOSFET Driver

Bipolar/CMOS/DMOS

Features

•

Built using reliable, low power CMOS processes

•

Latchproof. Withstands 500mA Inductive Kickback

•

3 Input Logic Choices

•

Symmetrical Rise and Fall Times .......................... 25ns

•

Short, Equal Delay Times ...................................... 75ns

•

High Peak Output Current ...................................... 1.2A

•

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

•

Low Equivalent Input Capacitance (typ) .................. 6pF

•

•

ESD Protected

Applications

•

General-Purpose CMOS Logic Buffer

•

Driving All 4 MOSFETs in an H-Bridge

•

Direct Small-Motor Driver

•

Relay or Peripheral Drivers

•

Dual Differential Output Power Drivers

•

CCD Driver

•

Pin-Switching Network Driver

Logic Diagrams

1A

1B

2A

2B

3A

3B

4A

4B

1Y

2Y

3Y

4Y

GND

1

2

3

4

5

6

8

9

13

12

11

10

14

7

MIC4468

1A

1B

2A

2B

3A

3B

4A

4B

1Y

2Y

3Y

4Y

GND

1

2

3

4

5

6

8

9

13

12

11

10

14

7

MIC4467

1A

1B

2A

2B

3A

3B

4A

4B

1Y

2Y

3Y

4Y

GND

1

2

3

4

5

6

8

9

13

12

11

10

14

7

MIC4469