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CF1155 series Melody LSIs
OVERVIEW
The CF1155 series are CMOS melody LSIs 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 I I I I I
Requires few external components 1.2 to 3.6V wide operating voltage range Low power consumption 3 melody modes (bonding option) Oscillator stop function in non-play mode 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
ORDERING INFORMATION
Device CF1155 Package Chip form
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CF1155 series
PAD LAYOUT and COORDINATES
(Unit: m)
Pad dimensions (Unit: m) X Y 1075 1075 1075 887 608 420 155 155 155 155 420
Number
Pad OUT OUT VDD TC T2 T1 VSS TO OSH LH VSS
VDD
3
OUT
2
OUT
1
(1230,1230)
1 2 3 4
930 529 155 155 155 155 223 486 750 1041 1075
TC T2 T1
HA1155
4
5 6 7 8 9 11 10
5
VSS
6 7 8
(0,0)
VSS TO OSH
LH
9 10 11
Chip size: 1.23 x 1.23mm Chip thickness: 300 30m T1, T2, TC, and TO bonding is not required.
PAD DESCRIPTION
Name OSH, LH OUT, OUT 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. Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and OUT is HIGH during output for a musical rest note. Both pins are HIGH during the gap between musical 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.
SEIKO NPC CORPORATION --2
CF1155 series
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 = 1.5V
Rating 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 OUT, OUT LOW-level output current OUT, OUT HIGH-level output current TO oscillator frequency TO frequency stability (relative to voltage) TO oscillator start voltage TO oscillator stop voltage 1. Measurement circuit Symbol VDD IDD1 IDD2 VIL VIH IIL IIH IOL IOH fOSC f/f1 f/f2 VDOB VDOS VDD = 1.2 to 2.0V VDD > 2.0V VIL = 0.4V VIH = 1.5V VOL = 0.75V VOH = 0.75V Non-play mode Melody modes: OUT, OUT open Condition min 1.2 - - - VDD - 0.2 0.7 0.7 2.0 2.0 35 - - - - typ 1.5 0.01 25 - - 1.5 1.5 - - 50 1 2 - - max 3.6 0.3 50 VSS + 0.2 - 3.0 3.0 - - 65 - - 1.2 1.2 V A A V V A A mA mA kHz %/0.1V %/1V V V Unit
A
VDD
1.5V
VSS
2. Measurement circuit
A
VDD
1.5V
LH
VSS
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CF1155 series
FUNCTIONAL DESCRIPTION
Melody Modes
The CF1155 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
OUT
1 TUNE REPEAT REPEAT
Oscillator
Pull-down resistance 135k (2-pin parallel resistance)
500k
135k
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CF1155 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
OUT
1 TUNE
Oscillator
Pull-down resistance
270k
1M
270k
1M
270k
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
OUT
1 TUNE 1 TUNE
From the begining
Oscillator
Pull-down resistance
270k 1M
270k 1M
270k 270k 1M 1M
270k
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CF1155 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 3.3A. 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 1M when the input is HIGH, and the pull-down resistance is 270k 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 CF1155 series devices support 3.5 octaves ranging from G3 to D7, from which 15 notes can be selected to form a scale.
SEIKO NPC CORPORATION --6
CF1155 series
TYPICAL APPLICATION
The circuits below represent the standard connections for CF1155 series devices.
Piezoelectric buzzer OUT OUT OUT
Piezoelectric buzzer OUT
VDD
Light
VDD
VSS OSH
LH
VSS
VSS OSH
LH
VSS
Circuit 1
Circuit 3
Piezoelectric buzzer OUT OUT
VDD
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
SEIKO NPC CORPORATION --7
CF1155 series
Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter "Products") are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter "NPC"). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies.
SEIKO NPC CORPORATION
15-6, Nihombashi-kabutocho, Chuo-ku, Tokyo 103-0026, Japan Telephone: +81-3-6667-6601 Facsimile: +81-3-6667-6611 http://www.npc.co.jp/ Email: sales@npc.co.jp
NC9922BE 2006.04
SEIKO NPC CORPORATION --8

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