HT3015A
15 Latin Rhythm Generator
Features
•
•
•
•
•
•
Operating Voltage: 2.4V~5.0V
Directly drive an external transistor
Low stand-by current
15 rhythms triggered by 16 keys
3Hz LED flash output
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
25th June ’96
HT3015A
Block Diagram
Pad Coordinates
Pad
No.
1
2
3
4
5
6
7
8
9
10
11
12
Unit:
µ
m
X
–1528.5
–1528.5
–1577
–1392
–91
94
279
464
805
990
1175
1360
Y
1728.5
1411.5
–1762.5
–1762.5
–1762.5
–1762.5
–1762.5
–1762.5
–1771.5
–1771.5
–1771.5
–1771.5
Pad
No.
13
14
15
16
17
18
19
20
21
22
23
X
Y
1545
–1771.5
1547
1414
1547
1718.5
1355.5 1768.5
1170.5 1768.5
985.5
1768.5
798
1768.5
–776
1773.5
–961
1773.5
–1146.5 1773.5
–1331.5 1773.5
Chip size: 3450
×
3920 (
µ
m)
2
* The substrate should be connected to VSS in the PCB layout artwork.
2
25th June ’96
HT3015A
Pin Description
Pin No.
1~6,
15, 24
7
8
9
10
11
12
13
14
Pin Name
KEY1~KEY16
NC
VDD
AUD
OSCO
OSCI
FLAG
VSS
TEST
I/O
I
—
I
O
O
I
O
I
I
Internal
Connection
Pull-High
—
—
PMOS
Output
—
—
Description
Trigger keys, low active, retriggerable keys
No connection
Positive power supply
Voice output for driving an external transistor
Oscillator output pin
Oscillator input pin
NMOS
3Hz flash, low active output, open drain
Open Drain
—
Pull-High
Negative power supply (GND)
For IC test only
Absolute Maximum Ratings
Supply Voltage ..............................–0.3V to 6.0V
Input Voltage................. V
SS
–0.3V to V
DD
+0.3V
Storage Temperature................. –50
°
C to 125
°
C
Operating Temperature................... 0
°
C to 70
°
C
(Ta=25
°
C)
Electrical Characteristics
Symbol
V
DD
I
DD
I
STB
I
AUD
I
OL
V
IL
V
IH
F
OSC
Parameter
Supply Voltage
Operating Current
Stand-by Current
Max. AUD Output Current
FLAG Sink Current
“L” Input Voltage
“H” Input Voltage
System Frequency
Test Condition
V
DD
—
3V
3V
3V
3V
—
—
3V
Min.
2.4
—
—
–1.5
1.5
—
0.7V
DD
—
Typ.
—
200
1
–2
3.0
—
—
180
Max.
5.0
400
5
—
—
0.2V
DD
—
—
Unit
V
µ
A
µ
A
Condition
—
No load
—
V
OH
=0.6V
V
OL
=0.3V
—
—
R
OSC
=100K
mA
mA
V
V
KHz
3
25th June ’96
HT3015A
Functional Description
KEY2~KEY16
KEY1
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:
KEY No.
KEY2
KEY3
KEY4
KEY5
KEY6
KEY7
KEY8
KEY9
KEY10
KEY11
KEY12
KEY13
KEY14
KEY15
KEY16
Rhythm
Latin fusion 1
Latin fusion 2
Latin ballad 1
Latin ballad 2
Latin ROCK 1
Latin ROCK 2
Latin fusion 3
Samba 1
Samba 2
Son afro
Mambo
Latin ROCK 3
Rhumba
Cha Cha
Samba 3
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 priority
KEY1 > KEY2 > KEY3 > .......... > KEY15 >
KEY16
KEY features
Pull-high resistance: 100k
Ω
Key-in debounce time: 22 ms
FLAG
3Hz flashing LED output during the playing of
the IC, active low, NMOS open drain output
Timing Diagram
4
25th June ’96
HT3015A
Application Circuits
Chip form
5
25th June ’96
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