TECHNICAL DATA
BT8028-XX
SIMPLE MELODY GENERATOR
FEATURES
FUNCTIONS
• 127-note ROM memory
• 1.3V to 3.3V power supply and
low power consumption
• RC oscillator on chip
• One shot or level hold mode
• Sound range: 4 octaves, 2
series
• Tempo: 16 kinds (presto-
largo)
• Direct piezo drive
• Solution of automatic stop or repeat of the
melody
• Dynamic speaker can be driven with external
NPN transistor
• Two or three times repeat of melody (mask
option)
• Each note can be individually programmed to
be staccato or legato (mask option)
• Changing the contents of melody is possible
by reprogramming the maskable ROM
• Power on reset; melody begins from the first
note
BT8028C-
XXL(S)
V
SS VCC OUT
• Start from the head of melody
• Bare chip or TO-92 are available
DESCRIPTION
The BT8028 is a CMOS LSI chip which electronically plays a prearranged melody. Selection of melody start signal is
possible by mask option: orders specification suffix "L" indicate Level Hold Mode, and suffix "S" indicate One Shot
Mode. The Universal version (as One Shot or Level Hold Mode) is possible also (suffix "U").
ABSOLUTE MAXIMUM RATINGS (Ta = 25oC)
Characteristic
Symbol
Value
Unit
DC Supply Voltage
Input Voltage
VCC – VSS
VIN
-0.3 ~ 3.5
VSS – 0.3 ~ VCC – 0.3
-20 ~ +65
V
V
oC
oC
Operating Temperature
Storage Temperature
Topr
Tstg
-55 ~ +125
ELECTRICAL CHARACTERISTICS (Ta = 25oC, VCC = 1.5V ; unless otherwise specified)
Characteristic
Operating Voltage
Symbol
Test Condition
Min
Typ
Max
Unit
VCC
IS
1.3
1.5
0.1
3.3
1
V
Supply Current
Stand-by
μA
Operating
ICC
Output open
VCC =1.3V, VO =0.8V
VCC =1.3V, VO =0.5V
FOSC(1.6V) - FOSC(1.3V)
FOSC(1.3V)
60
Output Drive Current
Output Sink Current
Frequency Stability
IOH
IOL
0.6
0.6
1.5
1.5
mA
mA
%
12
ΔF/F
1
INTEGRAL [ INTEGRAL CORP. ]
