MELODY INTEGRATED CIRCUIT
DESCRIPTIONThe UTC UM66TXXL series are CMOS LSI designed for using
in door bell, telephone and toy application. It is an on-chip ROM
programmed for musical performance. Produced by CMOS
technology, the device results in very low power consumption.
Since the UTC UM66TXXL series include oscillation circuits a
compact melody module can be constructed with only a few
additional components.
FEATURES
*64-Note Rom memory
*1.5V ~ 4.5V power supply and low power consumption
*Dynamic speaker can be driven with external NPN
transistor
*OSC resistor hold mode
*Power on reset: melody begins from the first note
*Built in level hold mode
FUNCTIONAL DESCRIPTION
OSCILLATOR CIRCUITThe oscillator frequency is used as a time for tone and beat generators. Its accuracy affects the quality of the music.
TONE GENERATOR
Tone Frequencies are oscillator frequencies-M, where m is any even number from 64 to 256. Within a melody 14C scales can be selected including Pause code and End code. The tone generator is a programmed divider, The Range of Scales is from “C4” to “C6” and range of frequency varies from 258Hz to 23768Hz.
RHYTHM GENERATORThe rhythm generator is also programmed dividers. It contain 15 available rhythms as
follows:1/4,1/2,3/4,1,1-1/4,1-1/2,1-/3/4,2,2-1/4,2-1/2,2-/3/4,3,3-1/4,3-1/2,3-/3/4.Four rhythms can be selected from these.
MELODY ROM
The Mask Rom can memorize 64 notes with 6 bit.4 bits are used for controlling the scale code and 2 bits are used for controlling the rhythm code.
TEMPO GENERATOR
There are 15 available tempos in the UTC UM66T series. The 15 tempos are:128,137,148,160,175,192,213,
240 , 274, 320,480,640,960,1920 J/minute.
Datasheet pdfhttp://www.utc-ic.com/spec/UM66TXXL.pdf
Melody IC SVM7910
Product FeaturesDebuting in 1978, the SVM 7910 electronic sound-generating device was the world’s
first melody IC, taking advantage of CMOS IC technology derived from the
development of quartz watches. The first finished product equipped with this device
was the Seiko Electronic Melodia, a quartz alarm clock released by Seikosha* in July
1978. A revolutionary product, the Electronic Melodia could produce three types of
electronic sounds—a melody, chimes, and a buzzer—each selected by simply
pressing a button.
Later, in April 1983, came the advent of the SVM7960, part of the SVM79 melody IC
series. With a maximum performance capacity of four songs, and a wide operating
voltage range, from 1.5 to 5 volts, the emergence of this melody IC filled out the
SVM79 series lineup, and expanded the range of sounds that could be expressed.
Datasheet pdf
http://www.epson.co.jp/e/company/milestones/10_svm7910.pdf
FT66T32S Simple Melody Generator ICGeneral DescriptionThe FT66T series is a CMOS LSI designed melody generator IC for use in telephones and toys application. It has an on-chip ROM programmed for musical performance. Produced by CMOS technology, the device results in very low power consumption. And with built-in RC oscillator, a compact melody module can be constructed with only a few additional components.
Features
- One Short Mode, Song : Walts
- 64-note ROM memory
- Bulit-in RC oscillator
- 1.3V to 3.3V operating voltage and low power consumption
- Level-hold mode to play repeatedly
- Dynamic speaker can be driven with external NPN transistor.
- Packaged in inexpensive TO-92 package
Datasheet pdf
http://www.warf.com/electronic-products-1492.html
H66T19/32/68 Series
Description
The H66T19/32/68 series is a CMOS LSI designed for use in door bell,
telephone and toy applications. It is an on-chip ROM program-med for
music performance. Produced by COMS technology, the device results in
very low power consumption. Since the H66T19/32-/68 series includes
oscillation circuits, a compact melody module can be constructed with only
a few additional components.
Feature
64-Note ROM memory
1.5V to 3V power supply and low power consumption
Dynamic speaker can be driven with external NPN transistor
OSC resistor is built-in
Built-in level hold mode
Power on reset: melody begins from the first note
Datasheet pdf
http://kr.ic-on-line.cn/IOL/viewpdf/H66T19AA_76262.htm
7910 Series
Multi-Melody IC
DESCRIPTIONThe series 7910 is a CMOS IC which plays prearranged melodies and alarm sounds electronically. Built-in oscillation circuit generates acoustic pulses, then melodies and alarm sounds are formed with only a few external discrete parts including resistor, capacitor, speaker etc. Thus the 7910 can enjoy various applications such as replacement for conventional music box and alarm sound generator.
NOTE: These are ongoing user service products.
FEATURES
- Melody ............................ 2 or 1
- Musical interval .................. Temperament or pure temperament
- Sound ............................. 2 series, 2.5 octave
- Compound interval or accompaniment are possible.(One octave interval)
- Tempo ............................. 16 kinds(Prest to Largo). Two tempos in one piece.
- Note ............................. Basic note , and also possible for
- Rest .............................. According to note
- Repeat ........................... Continuous performance of pieces, and repeats(8 times at most)of a piece.
- Beginning ......................... Always starts at the beginning of piece.
- Alarm Chime ....................... Two (not always equipped)
- Input signal ...................... 1 start signal, 3 selective signals.
- Envelope .......................... External CR(2 series)
- Volume control .................... From external circuit(volume etc.)
- Oscillation ....................... C, R oscillator (C, R external connection)
- Voltage ............................1.5V
- Package .......................... DIP-16pin(plastic)
Datasheet pdfhttp://www.es.co.th/Schemetic/PDF/7910CR-EPSON.PDF
