MULTI MELODY GENERATOR
FEATURES
IZ8018
FUNCTIONS
• Single-chip CMOS construction
• 512x10 bit ROM melodies
• Internal envelope circuit
• Tempo: 16 kinds
• Sound Range: 3 octaves (G4-G7)
• Serial select mode - total 7 melodies
• Play one melody, auto stop
• 32768 KHz extarnal clock
• Low stand-by current
• Single 1.5V operation
• Piezo direct drive
• Easy to connect with standard watch and clock LSI’s
DESCRIPTION
The IZ8018 is a CMOS multi melody IC. The circuit is composed of a 512-word ROM, address counter, tempo and tone generator,
address control circuit, envelope signal generator, switch control circuit and tone generator. The IZ8018 has complementary
outputs MO, MO for direct piezo drive. Since the IZ8018 includes an envelope circuit on the output MO, it can generate good
melody sound without any external component for envelope circuit. The IZ8018 can easily be connected to Integral’s standard
watch chips and designed especially for this target.
BLOCK DIAGRAM
Figure 1.
ABSOLUTE MAXIMUM RATINGS (Ta = 25oC)
Characteristic
Symbol
Value
Unit
Supply Voltage
Input Voltage
Output Voltage
VDD - VSS
VIN
-0.3 ~ 4.0
VSS - 0.3 ~ VDD + 0.3
VSS - 0.3 ~ VDD + 0.3
- 20 ~ + 75
V
V
VOUT
Ta
V
Operating Temperature
Storage Temperature
oC
oC
Tstg
- 55 ~ + 125
1
