HT2813.PDF

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HT2813

Single Sound Generator

Features

·

Single power supply 2.4~3.3V

·

1Hz~8Hz programmable LED flash output

·

Low standby current: 1

m

A (Typ.) at VDD=3

·

32 times of sound cycles maximum

·

Speaker or direct buzzer application

·

Minimum external components

·

Built-in envelope control circuit

General Description

The HT2813 is a CMOS LSI chip designed for

use in sound effects products. It is equipped

with tone circuit and other control logic to gen-

erate different sounds including bird sound,

ghost sound, alarm sound, and so forth. The

customer’s audio tape can be analyzed and pro-

grammed into an internal ROM by changing a

mask layer during device fabrication. The

HT2813 is suitable for various toy application.

Pin Assignment

Block Diagram

1

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HT2813

Pad Coordinates

Unit: mil

Pad No.

X

Y

Pad No. X

Y

1

–43.22 23.89

7

43.39 23.89

2

–43.39 –23.89

8

35.74 23.89

3

–5.65 –23.89

9

28.09 23.89

4

12.03 –23.89

10

20.44 23.89

5

19.68 –23.89

11

12.79 23.89

6

43.39 –23.89

12

3.36 23.89

59 (mil) 2

* The IC substrate should be connected to VDD in the PCB layout artwork.

´

Absolute Maximum Ratings*

Supply Voltage ................................. –0.3V to 5V

Storage Temperature................. –50

°

C to 125

°

C

Input Voltage.................... V SS –0.3 to V DD +0.3V

Operating Temperature................... 0

°

C to 70

°

C

*Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent

damageto the device. These are stress ratings only. Functional operation of this device at

these or any other conditions above those indicated in the operational sections of this

specification is not implied and exposure to absolute maximum rating conditions for extended

periods may affect device reliability.

Electrical Characteristics

(Ta=25

°

C)

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

V DD

Conditions

V DD

Operating Voltage

3V

—

2.4

3

3.3

V

I STB

Standby Current

3V

—

—

1

5

m

A

I DD

Operating Current

3V

No load

—

100

300

m

A

I OH

Output Source Current

3V

V OH =2.5V

–1

–2

—

mA

I OL

Output Sink Current

3V

V OL =0.5

1

2

—

mA

I ENV

ENV Source Current

3V

V OH =2.5V

–1

–2

—

mA

I LED

LED Source Current

3V

V OH =2.5V

–1

–2

—

mA

F OSC

Oscillator Frequency

—

R=56k

W

—

256

—

kHz

V IH

“H” Input Voltage

3V

—

2.4

—

—

V

2

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Chip size : 98

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HT2813

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

V DD

Conditions

V IL

“L” Input Voltage

3V

—

—

—

0.6

V

Pin Description

Pin No. Pad No.

Pad Name

I/O

Description

3

1

KEY

I

Key input pad, active low

7

2

ENV

O

Sound envelope effect pad

8

3

OUT

O

Sound output pad

9

4

OUT

O

Sound output pin, out of phase to pad 3

10

5

LED

O

LED flash output pad

11

6

VSS

—

Negative power supply

13

7

OSC1

I

Oscillator input pad

14

8

OSC2

O

Oscillator output pad

15

9

TEST1

I/O

For IC test only

16

10

TEST2

I/O

For IC test only

1

11

TEST3

I/O

For IC test only

2

12

VDD

—

Positive power supply

Timing Diagram

With an envelope

Without an envelope

3

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HT2813

Application Circuits

Speaker application with an envelope

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HT2813

Speaker application without an envelope

5

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