CF5741 series Analog Clock CMOS IC NIPPON PRECISION CIRCUITS INC. OVERVIEW PINOUT The CF5741 series are analog clock driver ICs using 32.768kHz reference frequency of crystal oscillator. Some versions in accordance with the combinations of each motor drive and alarm output characteristics can provide a wide range of applications for various clock specifications. (Top View) FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ VSS 1 AO1 2 AO2/F 3 XTN 4 XT 5 SA5741 Y Operating voltage 1.2 to 2.0V Low current 1.2µA (typ) / 1.5V Built-in oscillator circuits (32.768 kHz) Built-in crystal oscillator capacitors (CG, CD) Motor output Various motor output Alarm output Various alarm output Reset function Input debounce function (AI, RST/TC) Chip form (CF5741××) 10 OUT2 9 OUT1 8 AI 7 RST/TC 6 VDD (0,0) X Chip size : 1.22 × 1.20 mm Chip thickness : 400 ± 30 µm Pad size : 100 × 100 µm Reverse side : V DD level SERIES LINEUP Built-in capacitor Reset input Motor output CF5741AA CF5741AB CF5741BA CF5741BB XT terminal CG (pF) 0 XTN terminal CD (pF) 25 25 0 27 25 25 25 Active level Low (Pull-up resistor) Low (Pull-up resistor) Low (Pull-up resistor) Low (Pull-up resistor) Active level High High High High 1 1 1 1 31.25 31.25 46.875 46.875 Low (Pull-up resistor) Low (Pull-up resistor) Low (Pull-up resistor) Low (Pull-up resistor) Yes Yes Yes Yes Hand drive cycle tCY (sec) Pulse width tPW (msec) Active level Alarm input Test function (1/2VDD ) Alarm output Terminal AO1 AO2/F AO1 AO2/F AO1 AO2/F1 AO1 AO2/F1 Active level High High High High High Low High Low Fundamental frequency fPW (Hz) 2048 32 2048 32 2048 2048 2048 2048 Modulation frequency fCY (Hz) 8+1 − 8+1 − 8+1 8+1 8+1 8+1 1. AO is complete reverse phase of AO. (even output is inactive.) ORDERING INFORMATION Device Package CF5741×× Chip form NIPPON PRECISION CIRCUITS—1 CF5741 series BLOCK DIAGRAM VDD VSS 4 Stage Divider 13 Stage Divider AO Test Alarm Output Control Motor Output Control AO1 AO2/F OUT1 OUT2 CG XT CD XTN RST/TC Reset Input AI Alarm Input Alarm Test PIN DESCRIPTION Number Name Description Dimensions (µm) X Y 1 VSS Ground 147 1048 2 AO1 Alarm signal output1 147 867 3 AO2 / F Alarm signal output2/Frequency output 147 685 4 XTN Crystal oscillator connection 146 446 5 XT Crystal oscillator connection 146 206 6 VDD Power supply pin 1072 147 7 RST / TC Reset/Test clock input 1073 386 8 AI Alarm input 1073 626 9 OUT1 Motor drive output 1 1072 867 10 OUT2 Motor drive output 2 1072 1048 NIPPON PRECISION CIRCUITS—2 CF5741 series SPECIFICATIONS Absolute Maximum Ratings Parameter Rating Unit V DD − V SS − 0.3 to 5.0 V V IN V SS ≤ V IN ≤ V DD V Operating temperature TOPR − 30 to 80 °C Storage temperature T STG − 65 to 150 °C Supply voltage Input voltage Symbol Condition Electrical Characteristics Ta = 25°C, VDD = 1.5V, VSS = 0V, X′tal (fo = 32.768kHz, CI ≤ 35kΩ), unless otherwise noted. Rating Parameter Symbol Supply voltage V DD Current consumption IDD Oscillator start-up time tSTA Condition Unit min typ max 1.2 1.5 2.0 V 1.2 4.0 µA 5.0 sec 2.0 sec OUT1, OUT2 = Open V DD = 1.2V V DD = 1.5V V DD = 1.2V, RL = 200Ω1 4.0 mA Motor output current IMOT Input resistance2(AI, RST/TC) R IN Oscillator stability ∆ f/f V DD = 1.2V to 2.0V IOL1 VOL = 0.75V 900 µA IOL2 VOL = 0.75V 10 µA IOH1 VOH = 0.75V 900 µA IOH2 VOH = 0.75V 10 µA V DD = 1.2V, CL = 50pF 0.4 V Alarm output current (AO1, AO2/F) Frequency output voltage Internal capacitance3 VF 200 0.5 1200 kΩ 1.0 ppm / 0.1V CG pF CD pF 1. RL is resistor of motor coil, that connect OUT1 between OUT2. 2. RIN = V DD /IIS. IIS is current that flow into VSS from AI, RST/TC, when AI, RST/TC short VSS. (AI,RST/TC build-in pull-up resistor.) 3. CG is internal capacitor between VDD and XT. CD is internal capacitor between VDD and XTN. NIPPON PRECISION CIRCUITS—3 CF5741 series FUNCTIONAL DESCRIPTION Motor Output Stepping motor drive type tPW OUT1 (Active High) tPW OUT2 (Active High) tCY tCY 1sec 1sec tCY : Needle period tPW : Pulse width Sweeping motor drive type OUT1 tCY 125msec tCY : Needle period tPW : Pulse width OUT2 tCY 125msec Input Debounce Function (AI ,RST/TC) Setting bouncing delay time prevents the circuit from the erroneous operation by AI and RST/TC input bouncing. tON < 62.5 msec : Alarm and reset input is ignored. 62.5 ≤ tON ≤ 125 msec : Alarm and reset input is ignored or accepted. tON > 125 msec : Alarm and reset input is accepted. tON AI , RST/TC (Active Low) NIPPON PRECISION CIRCUITS—4 CF5741 series Reset Function RST/TC goes to active level when motor output can be stopped. Motor output(AO1,AO2) restart of another stopped output after reset off. RST/TC (Active Low) tPW tON OUT1 (Active High) tPW OUT2 (Active High) tCY tCY +0 tCY −125msec Alarm Output Alarm input/output tON AI (Active Low) AO1 (Active High) fCY (Hz) fPW(Hz) *1 AO2/F (Active High) *2 AO2/F (Active Low) *1 : AO2 / F is the reverse phase of AO1, when output is active. *2 : AO2 / F is complete reverse phase of AO1. fPW : Alarm fundamental frequency fCY : Alarm modulation frequency NIPPON PRECISION CIRCUITS—5 CF5741 series Test Function Fundamental frequency alarm output function AI goes to 1/2VDD when AO1 and AO2 output alarm fundamental frequency. This frequency can used to adjust frequency. 1/2VDD AI (Active Low) fPW(Hz) fCY (Hz) AO1 (Active High) *1 AO2/F (Active High) *2 AO2/F (Active Low) *1 : AO2 / F is the reverse phase of AO1, when output is active. *2 : AO2 / F is complete reverse phase of AO1. fPW : Alarm fundamental frequency fCY : Alarm modulation frequency Gain fast function RST/TC is active level more than 125 msec. And RST/TC input outside clock when motor output gain fast. tCPW is more less than 0.9765625 msec. tRES tCPW RST/TC (Active Low) tRES ≥ 125msec tCPW ≤ 0.9765625msec NIPPON PRECISION CIRCUITS—6 CF5741 series APPLICATION CIRCUITS CIN VDD XT Battery 1.5V Reset Switch X'tal RST/TC AI Alarm Switch OUT1 XTN CF5741AA CF5741AB CF5741BA CF5741BB Speaker AO2/F Transistor AO1 M OUT2 VSS Stepping Motor 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. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome Koto-ku, Tokyo 135-8430, Japan Telephone: 03-3642-6661 Facsimile: 03-3642-6698 NC9613DE 1998.08 NIPPON PRECISION CIRCUITS—7