4-287

March 1997

82C84A

CMOS Clock Generator Driver

Features

• Generates the System Clock For CMOS or NMOS

Microprocessors

• Up to 25MHz Operation

• Uses a Parallel Mode Crystal Circuit or External

Frequency Source

• Provides Ready Synchronization

• Generates System Reset Output From Schmitt Trigger

Input

• TTL Compatible Inputs/Outputs

• Very Low Power Consumption

• Single 5V Power Supply

• Operating Temperature Ranges

Description

The Intersil 82C84A is a high performance CMOS Clock Generator-

driver which is designed to service the requirements of both CMOS

and NMOS microprocessors such as the 80C86, 80C88, 8086 and

the 8088. The chip contains a crystal controlled oscillator, a divide-by-

three counter and complete “Ready” synchronization and reset logic.

Static CMOS circuit design permits operation with an external fre-

quency source from DC to 25MHz. Crystal controlled operation to

25MHz is guaranteed with the use of a parallel, fundamental mode

crystal and two small load capacitors.

All inputs (except X1 and RES) are TTL compatible over tempera-

ture and voltage ranges.

Power consumption is a fraction of that of the equivalent bipolar cir-

cuits. This speed-power characteristic of CMOS permits the

designer to custom tailor his system design with respect to power

and/or speed requirements.

Ordering Information

PART

NUMBER

TEMP. RANGE

PACKAGE

PKG.

NO.

CP82C84A

18 Ld PDIP

E18.3

IP82C84A

E18.3

CS82C84A

20 Ld PLCC

N20.35

IS82C84A

N20.35

CD82C84A

18 Ld CERDIP

F18.3

ID82C84A

F18.3

MD82C84A/B

F18.3

8406801VA

SMD#

F18.3

MR82C84A/B

20 Pad CLCC

J20.A

84068012A

SMD#

J20.A

Pinouts

82C84A (PDIP, CERDIP)

TOP VIEW

82C84A (PLCC, CLCC)

TOP VIEW

10

11

12

13

14

15

16

17

18

9

8

7

6

5

4

3

2

1

X2

EFI

F/C

OSC

RES

X1

GND

ASYNC

RESET

CSYNC

PCLK

RDY1

READY

RDY2

CLK

AEN1

AEN2

4

5

6

7

8

910

11

12

13

321

20

19

15

14

18

17

16

RDY1

AEN2

NC

READY

RDY2

NC

F/C

EFI

X2

ASYNC

File Number

2974.1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207