Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UM66TXXL
CMOS IC
MELODY INTEGRATED
CIRCUIT

DESCRIPTION
The 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.

1
TO-92
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

ORDERING INFORMATION
Order Number
Lead Free
Halogen Free
UM66TxxLK-T92-B
UM66TxxLG-T92-B
UM66TxxLK-T92-K
UM66TxxLG-T92-K

TO-92
TO-92
Pin Assignment
1
2
3
VSS
VDD
O/P
VSS
VDD
O/P
Packing
Tape Box
Bulk
SONG SERIES LIST
P/N
UTC UM66T05L
UTC UM66T08L
UTC UM66T11L
UTC UM66T19L
UTC UM66T32L

Package
SONG NAME
Home Sweet Home
Happy Birthday
Love Me Tender
For Alice
COO COO waltz
MARKING
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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UM66TXXL

CMOS IC
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified.)
PARAMETER
SYMBOL
RATINGS
UNIT
DC Supply Voltage
VDD
1.5 ~ 4.5
V
Operating Temperature
TOPR
-10 ~ +60
C
Storage Temperature
TSTG
-55 ~ +125
C
Notes: Stress above those listed under absolute maximum ratings may cause permanent damage to the device.
These are stress ratings only. Functional operations of this device at these or any other conditions above
those indicated in the operational section of this specification is not implied and exposure to absolute
maximum ratings conditions for extended periods may affect device reliably.

ELECTRICAL CHARACTERISTICS (VSS=0V, FOSC=65536Hz, TJ=25C, unless otherwise specified)
PARAMETER
Operating Voltage
Operating Current
O/P Drive Current
O/P Sink Current
Frequency Deviation
Deviation Per Lot
Frequency Stability
SYMBOL
VDD
IDD
IO(DRIVE)
IO(SINK)
F/F
F/F
TEST CONDITIONS
VDD=1.5V, O/P open
VDD=1.5V,O/P=0.8V
VDD=1.5V, O/P=0.5V open
VDD=1.5V
Fosc(1.6V)  Fosc(1.5V)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
Fosc(1.5V)
MIN
1.5
TYP
400
350
600
450
MAX
4.5
60
UNIT
V
μA
μA
μA
-12
%
10
%
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UM66TXXL

CMOS IC
FUNCTIONAL DESCRIPTION
OSCILLATOR CIRCUIT
The 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 GENERATOR
The 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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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UM66TXXL

CMOS IC
APPLICATION CIRCUITS
Fig.1
Fig.2
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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