CF1155

CF1155 series NIPPON PRECISION CIRCUITS INC. 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 s s s s s s 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 s s s s s 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: µm) Number 1 Pad OUT OUT 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 OUT 2 OUT 1 (1230,1230) 2 3 4 5 TC T2 T1 HA1155 4 5 6 7 8 9 11 10 6 VSS 7 8 9 (0,0) VSS TO OSH LH 10 11 C hip size: 1.23 × 1 .23mm Chip thickness: 300 ± 30µm T1, T2, T C , and TO bonding is not required. ORDERING INFORMATION D e vice CF1155 P ackag e Chip form NIPPON PRECISION CIRCUITS—1 C F1155 series PAD DESCRIPTION Name OSH, LH O U T, O U T VDD VSS T1, T2, T C 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 O U T i s HIGH during output for a m usical rest note. Both pins are HIGH during the gap between musical notes. Supply. The rear surface of the chip is V D D l evel. Ground Test inputs. Pull-down resistor built-in. Test output. The oscillator frequency (typ. 50kHz) is output for monitoring pur poses. SPECIFICATIONS Absolute Maximum Ratings P arameter S upply voltage range Input voltage range Operating temperature range Storage temperature range Symbol VDD − VSS V IN T o pr T s tg Condition Rating −0 .3 to 5.0 V S S − 0 .2 to V D D + 0 .2 −2 0 to 80 −6 5 to 150 Unit V V °C °C Electrical Characteristics Ta = 25°C, VSS = 0V, VDD = 1.5V Rating P arameter O perating voltage Current Current consumption 1 consumption 2 Symbol VDD ID D 1 ID D 2 V IL V IH II L II H IO L IO H fO S C ∆f/f1 ∆f/f2 VDOB VDOS V D D = 1 .2 to 2.0V V D D > 2 .0V V I L = 0 .4V V I H = 1 .5V V O L = 0 .75V V O H = 0 .75V N on-play mode M elody modes: O U T, O U T o pen Condition min 1 .2 – – – V D D – 0 .2 0.7 0.7 2.0 2.0 35 – – – – 2 . Measurement circuit typ 1.5 0.01 25 – – 1.5 1.5 – – 50 1 2 – – max 3.6 0.3 50 V S S + 0 .2 – 3.0 3.0 – – 65 – – 1.2 1.2 V µA µA V V µA µA mA mA kHz %/0.1V %/1V V V Unit L H , O S H L OW -level input voltage LH, OSH HIGH-level input voltage L H , O S H L OW -level input current LH, OSH HIGH-level input current O U T, O U T L OW -level output current O U T, O U T H IGH-level output current TO oscillator frequency TO frequency stability (relative to voltage) TO oscillator start voltage TO oscillator stop voltage 1 . Measurement circuit A VDD A VDD 1.5V VSS 1.5V LH VSS NIPPON PRECISION CIRCUITS—2 C F1155 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 M e l o dy m o d e 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 135kΩ (2-pin parallel resistance) 500kΩ 135kΩ NIPPON PRECISION CIRCUITS—3 C F1155 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 270kΩ 1MΩ 270kΩ 1MΩ 270kΩ Pull-down resistance 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 270kΩ 1MΩ 270kΩ 270kΩ 1MΩ 1MΩ 1MΩ Pull-down resistance 270kΩ 270kΩ NIPPON PRECISION CIRCUITS—4 C F1155 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 3.3µA. 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 1MΩ when the input is HIGH, and the pull-down resistance is 270kΩ 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 Ty p e 0 Note R est 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. NIPPON PRECISION CIRCUITS—5 C F1155 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 N ote 1: There are 2 V S S p ads, 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 M e l o dy m o d e Level hold 1 Level hold 2 One-shot NIPPON PRECISION CIRCUITS—6 C F1155 series N IPPON 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 fo r 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 expor t controls on the distribution or dissemination of the products. Customers shall not expor t, 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: 03-3642-6661 Facsimile: 03-3642-6698 NC9922AE 2000.05 NIPPON PRECISION CIRCUITS INC. NIPPON PRECISION CIRCUITS—7