4-1

March 1997

82C54

CMOS Programmable Interval Timer

Features

• 8MHz to 12MHz Clock Input Frequency

• Compatible with NMOS 8254

- Enhanced Version of NMOS 8253

• Three Independent 16-Bit Counters

• Six Programmable Counter Modes

• Status Read Back Command

• Binary or BCD Counting

• Fully TTL Compatible

• Single 5V Power Supply

• Low Power

- ICCSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

µA

- ICCOP . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA at 8MHz

• Operating Temperature Ranges

Description

The Intersil 82C54 is a high performance CMOS Program-

mable Interval Timer manufactured using an advanced 2

micron CMOS process.

The 82C54 has three independently programmable and

functional 16-bit counters, each capable of handling clock

input frequencies of up to 8MHz (82C54) or 10MHz

(82C54-10) or 12MHz (82C54-12).

The high speed and industry standard configuration of the

82C54 make it compatible with the Intersil 80C86, 80C88,

and 80C286 CMOS microprocessors along with many other

industry standard processors. Six programmable timer

modes allow the 82C54 to be used as an event counter,

elapsed time indicator, programmable one-shot, and many

other applications. Static CMOS circuit design insures low

power operation.

The Intersil advanced CMOS process results in a significant

reduction in power with performance equal to or greater than

existing equivalent products.

Pinouts

82C54 (PDIP, CERDIP, SOIC)

TOP VIEW

82C54 (PLCC/CLCC)

TOP VIEW

1

2

3

4

5

6

7

8

9

10

11

12

16

17

18

19

20

21

22

23

24

15

14

13

D7

D6

D5

D4

D3

D2

D1

D0

CLK 0

OUT 0

GATE 0

GND

VCC

RD

CS

A1

A0

OUT 2

CLK 1

GATE 1

OUT 1

WR

CLK 2

GATE 2

CS

A1

A0

CLK2

NC

GATE 2

OUT 2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

D3

D2

D1

D0

D4

NC

CLK 0

File Number

2970.1

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

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