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CF1156 series Melody LSIs
OVERVIEW
The CF1156 series are CMOS melody LSIs with built-in LED driver that, together with a battery and piezoelectric buzzer, operate in one of 3 melody modes determined by input level or bonding options. They also feature an oscillator stop function in non-play mode and a variable pull-down resistance function that responds to input levels in order to reduce power consumption, reduce cost, and extend battery life, making them ideal in a wide range of applications including greeting cards and toys.
FEATURES
I I I I I I
LED direct drive Requires few external components 2.0 to 3.6V wide operating voltage range Low power consumption 3 melody modes (bonding option) Oscillator stop function in non-play mode
I I I I I I
Power saving pull-down resistor built-in RC oscillator circuit Power-ON initialization function 2 VSS pad connections Wide pitch dynamic range (G3 to D7) Chip form
PAD LAYOUT and COORDINATES
(Unit: m)
Number 1 Pad BO LO VDD TC T2 T1 VSS TO OSH LH VSS X 930 529 155 155 155 155 223 486 750 1041 1075 Y 1075 1075 1075 887 608 420 155 155 155 155 420
VDD
3
LO
2
BO
1
(1230,1230)
2 3 4 5
TC T2 T1
HA1156
4
5
6
6 7 8 9 11 10
VSS
7 8 9 10 11
(0,0)
VSS TO OSH
LH
Chip size: 1.23 x 1.23mm Chip thickness: 300 30m T1, T2, TC, and TO bonding is not required.
ORDERING INFORMATION
Device CF1156 Package Chip form
NIPPON PRECISION CIRCUITS INC.--1
CF1156 series
PAD DESCRIPTION
Name OSH, LH LO BO VDD VSS T1, T2, TC TO Function Melody mode control inputs. Built-in pull-down resistors mean LOW-level signals are obtained when inputs are open circuit. The resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics. LED drive output, HIGH level during non-play mode. Piezoelectric speaker driver output. LOW level output during non-play mode and during musical rest notes. HIGH level output during gaps between melody notes. Supply. The rear surface of the chip is VDD level. Ground Test inputs. Pull-down resistor built-in. Test output. The oscillator frequency (typ. 50kHz) is output for monitoring purposes.
SPECIFICATIONS
Absolute Maximum Ratings
Parameter Supply voltage range Input voltage range Operating temperature range Storage temperature range Symbol VDD - VSS VIN Topr Tstg Condition Rating -0.3 to 5.0 VSS - 0.2 to VDD + 0.2 -20 to 80 -65 to 150 Unit V V C C
Electrical Characteristics
Ta = 25C, VSS = 0V, VDD = 3.0V
Parameter Operating voltage Current consumption1 Current consumption2 LH, OSH LOW-level input voltage LH, OSH HIGH-level input voltage LH, OSH LOW-level input current LH, OSH HIGH-level input current BO LOW-level output current BO HIGH-level output current LO LOW-level output current LO HIGH-level output current TO oscillator frequency TO oscillator start voltage TO oscillator stop voltage 1. Measurement circuit Symbol VDD IDD1 IDD2 VIL VIH IIL IIH IOL1 IOH1 IOL2 IOH2 fOSC VDOB VDOS VIL = 0.8V VIH = 3.0V VOL = 1.0V VOH = 2.0V VOL = 1.0V VOH = 2.0V Non-play mode Melody modes: BO, LO open Condition Rating min 2.0 - - - VDD - 0.2 0.7 0.7 4.0 4.0 10 8 35 - - 2. Measurement circuit typ 3.0 0.01 100 - - 9.0 9.0 - - - - 50 - - max 3.6 0.6 200 VSS + 0.2 - 18 18 - - - - 65 2.0 2.0 Unit V A A V V A A mA mA mA mA kHz V V
A
VDD
A
VDD
3.0V
VSS
3.0V
LH
VSS
NIPPON PRECISION CIRCUITS INC.--2
CF1156 series
FUNCTIONAL DESCRIPTION
LED Indicator
The LED flashes during melody play mode only, at intervals representing a 1/8 musical note length.
LED flash
= 1 cycle
Note: The LED flashes at intervals equal to a 1/8 musical note, regardless of the melody note length being output. Play Non-play VDD
LED flash interval BO
LO
Active:LOW VSS
Melody Modes
The CF1156 series melody mode is determined by the bonding options and levels on the mode control inputs OSH and LH. When either OSH or LH or both go HIGH (VDD), the corresponding melody mode is selected as shown in the following table.
OSH HIGH LOW HIGH LOW LH HIGH HIGH LOW LOW Melody mode Level hold 1 Level hold 2 One-shot Non-play
Level hold 1 When both OSH and LH go HIGH, melody play starts and continues while both are held HIGH. When both inputs go open circuit or LOW, melody play stops, even if during mid melody. Note that both OSH and LH inputs should be switched simultaneously using a single switch. If there is timing difference between the two inputs, then LH has priority.
OSH
LH
BO
1 TUNE REPEAT REPEAT
Oscillator
Pull-down resistance (2-pin parallel resistance)
45k
150k
45k
NIPPON PRECISION CIRCUITS INC.--3
CF1156 series Level hold 2 When LH goes HIGH, a single melody play starts. Melody play continues until the single melody ends or LH goes open circuit or LOW, whichever occurs first.
LH
BO
1 TUNE
Oscillator
Pull-down resistance
90k
300k
90k
300k
90k
One-shot When OSH goes HIGH, a single melody play starts. Melody play continues until the melody ends, even if OSH goes open circuit or LOW mid melody. However, if the OSH input goes HIGH again during melody play, the melody play restarts from the beginning.
OSH
BO
1 TUNE 1 TUNE
From the begining
Oscillator
Pull-down resistance
90k 300k
90k 300k
90k
90k
90k
300k 300k
NIPPON PRECISION CIRCUITS INC.--4
CF1156 series
Power-save Function
As shown in the preceding timing diagrams, the oscillator stops during non-play mode and the pull-down resistance value changes in response to both HIGH-level and LOW-level inputs (power-save pull-down resistor) to reduce power consumption and extend battery life. Non-play oscillator stop function When melody play ends, regardless of the state of either LH or OSH, the internal oscillator stops and is placed in a standby state. In this state, the current consumption, including input pin pull-down resistor current (IIH max), does not exceed 18.6A. Power-save pull-down resistor The resistance of the OSH and LH input pull-down resistor changes in response to the input voltage. The pulldown resistance is 300k when the input is HIGH, and the pull-down resistance is 90k when the input is LOW. Furthermore, if a light-dependent resistor (CdS) cell is employed as a switch (the pull-down resistance is maximum when the CdS resistance is minimum (light) and the pull-down resistance is minimum when the CdS resistance is maximum (dark)), the combined resistance can be increased, decreasing current consumption.
Musical Specifications
Maximum program steps A maximum of 64 steps can be programmed into internal mask-programmable ROM. Each step represents either a note (sound pitch and length), a rest note, or a jump. The maximum number of jumps is 7. Note length (including rests) Eight rhythm values, from sixteenth note to half note, for notes and rests can be programmed, as shown in the following table.
Code Type 0 Note Rest 1 2 3 4 5 6 7
Also, notes and rests longer than half notes and rests can be created using a tie to connect the notes. This requires 2 program steps in ROM. Tempo The tempo for the standard quarter note can be selected from the following 16 options.
Code = 0 697 1 348 2 232 3 174 4 139 5 116 6 99.4 7 87 8 77.3 9 69.6 A 63.3 B 58 C 53.5 D 49.7 E 46.4 F 43.5
Pitch and scale The CF1156 series devices support 3.5 octaves ranging from G3 to D7, from which 15 notes can be selected to form a scale.
NIPPON PRECISION CIRCUITS INC.--5
CF1156 series
TYPICAL APPLICATION
The circuits below represent the standard connections for CF1156 series devices.
VDD
LO
BO
VDD
LO
BO
Light VSS OSH LH VSS CdS VSS OSH LH VSS
Circuit 1
Circuit 3
VDD
LO
BO
VSS OSH
LH
VSS
Circuit 2
Note 1: There are 2 VSS pads, and either pad can be used. Note 2: Circuit 1 is for one-shot mode, circuit 2 for level hold 1/2 modes, and circuit 3 for CdS connection.
The bonding options for the above circuits is shown in the following table.
OSH Yes LH Yes Yes Yes Melody mode Level hold 1 Level hold 2 One-shot
NIPPON PRECISION CIRCUITS INC.--6
CF1156 series
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome, Koto-ku, Tokyo 135-8430, Japan Telephone: +81-3-3642-6661 Facsimile: +81-3-3642-6698 http://www.npc.co.jp/ Email: sales@npc.co.jp
NC0002BE 2001.06
NIPPON PRECISION CIRCUITS INC.--7

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