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HT3015A

15 Latin Rhythm Generator

Features

·

Operating Voltage: 2.4V~5.0V

·

15 rhythms triggered by 16 keys

·

Directly drive an external transistor

·

3Hz LED flash output

·

Low stand-by current

·

24 pin dual-in-line package

Applications

·

Toys

·

Sound effect generators

General Description

The HT3015A is a single-chip PCM rhythm gen-

erator implemented in the CMOS technology.

The IC includes 16 keys and can generate 15

kinds of rhythm. While the IC is playing, an

LED flashes at a rate of 3Hz. Various types of

timbre and rhythm can be generated by coding

the internal ROM. The IC is offered in either a

dice form or 24 pin dual-in-line package.

Pin Assignment

1

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HT3015A

Block Diagram

Pad Coordinates

Unit:

m

m

Pad

No.

X

Y

Pad

No.

X

Y

1 –1528.5 1728.5 13

1545 –1771.5

2 –1528.5 1411.5 14

1547

1414

3

–1577 –1762.5 15

1547

1718.5

4

–1392 –1762.5 16 1355.5 1768.5

5

–91

–1762.5 17 1170.5 1768.5

6

94

–1762.5 18

985.5 1768.5

7

279

–1762.5 19

798

1768.5

8

464

–1762.5 20

–776

1773.5

9

805

–1771.5 21

–961

1773.5

10

990

–1771.5 22 –1146.5 1773.5

11

1175 –1771.5 23 –1331.5 1773.5

12

1360 –1771.5

m) 2

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

´

3920 (

m

2

25th June ’96

Chip size: 3450

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HT3015A

Pin Description

Pin No.

Pin Name

I/O

Internal

Connection

Description

1~6,

15, 24

KEY1~KEY16

I

Pull-High Trigger keys, low active, retriggerable keys

7

NC

—

—

No connection

8

VDD

I

—

Positive power supply

9

AUD

O

PMOS

Output

Voice output for driving an external transistor

10

OSCO

O

—

Oscillator output pin

11

OSCI

I

—

Oscillator input pin

12

FLAG

O

NMOS

Open Drain

3Hz flash, low active output, open drain

13

VSS

I

—

Negative power supply (GND)

14

TEST

I

Pull-High For IC test only

Absolute Maximum Ratings

Supply Voltage .............................. –0.3V to 6.0V

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

°

C to 125

°

C

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

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

°

C to 70

°

C

Electrical Characteristics

(Ta=25

°

C)

Symbol

Parameter

Test Condition

Min.

Typ.

Max. Unit

V DD Condition

V DD

Supply Voltage

—

—

2.4

—

5.0

V

I DD

Operating Current

3V

No load

—

200

400

m

A

I STB

Stand-by Current

3V

—

—

1

5

m

A

I AUD Max. AUD Output Current

3V

V OH =0.6V

–1.5

–2

—

mA

I OL

FLAG Sink Current

3V

V OL =0.3V

1.5

3.0

—

mA

V IL

“L” Input Voltage

—

—

—

—

0.2V DD

V

V IH

“H” Input Voltage

—

—

0.7V DD

——V

F OSC System Frequency

3V

R OSC =100K

—

180

—

KHz

3

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HT3015A

Functional Description

KEY2~KEY16

KEY2~KEY16 can individually play a section of

the 15 built-in demo-rhythms 4 times continu-

ously. Their corresponding rhythms are as fol-

lows:

KEY1

KEY1 is a sequential input key. Pressing this

key once plays the first rhythm, and re-pressing

it plays the second rhythm, and so forth. Any

key of KEY2~KEY16 can be pressed to reset

KEY1 (return to the first section of the first

group).

KEY No.

Rhythm

KEY2

Latin fusion 1

KEY priority

KEY1 > KEY2 > KEY3 > .......... > KEY15 >

KEY16

KEY3

Latin fusion 2

KEY4

Latin ballad 1

KEY5

Latin ballad 2

KEY features

Pull-high resistance: 100k

KEY6

Latin ROCK 1

W

Key-in debounce time: 22 ms

KEY7

Latin ROCK 2

KEY8

Latin fusion 3

FLAG

3Hz flashing LED output during the playing of

the IC, active low, NMOS open drain output

KEY9

Samba 1

KEY10

Samba 2

KEY11

Son afro

KEY12

Mambo

KEY13

Latin ROCK 3

KEY14

Rhumba

KEY15

Cha Cha

KEY16

Samba 3

Timing Diagram

4

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HT3015A

Application Circuits

Chip form

5

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