HIGH TECH

CHIPS, INC.

01/04/00

1

GENERAL PURPOSE CLOCK GENERATOR

1.0 General description.

HTC555 is a general-purpose clock generator. It requires no

external components and provides wide range of clock

frequencies. It’s very easy to use and provides general clock

solution in wide range of applications. It is very simple to design

and operate. Output frequency is determined by value of D[0:4].

Refer to Output frequency table.

Features

• Single chip solution.

• Replaces clock generator.

• Has one percent frequency accuracy at room temperature.

• Has ten percent frequency accuracy over temperature range and VDD voltage range.

• Requires no external components for operation.

2.0 Application.

Typical connection diagram.

PDIP, SOIC

18

27

36

4

5

HTC555

VDD

GND

CLKOUT

D0

D4

D1

D3

D2

VDD

VDD

10K

R1

100n

C1

10K

R2

HTC555

D0

7

D1

6

D2

5

VDD

1

D4

3

D3

4

CLKOUT

2

GND

8

FREQUENCY SELECTION

1

2

3

4

5

10

9

8

7

6

10K

R3

10K

R4

10K

R5

CLOCK OUTPUT