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| CF5741 series NIPPON PRECISION CIRCUITS INC. Analog Clock CMOS IC OVERVIEW 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. PINOUT (Top View) VSS AO1 AO2/F Y XTN XT (0,0) 1 2 3 4 5 SA5741 10 9 8 7 6 OUT2 OUT1 AI RST/TC VDD FEATURES s s s s s s s s s Operating voltage 1.2 to 2.0V Low current 1.2A (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 (CF5741xx) X Chip size : 1.22 x 1.20 mm Chip thickness : 400 30 m Pad size : 100 x 100 m Reverse side : V DD level SERIES LINEUP CF5741AA Built-in capacitor Reset input XT terminal CG (pF) XTN terminal CD (pF) Active level Active level Motor output Hand drive cycle tCY (sec) Pulse width tPW (msec) Alarm input Active level Test function (1/2VDD ) Terminal Alarm output Active level Fundamental frequency fPW (Hz) Modulation frequency fCY (Hz) AO1 High 2048 8+1 0 25 Low (Pull-up resistor) High 1 31.25 Low (Pull-up resistor) Yes AO2/F High 32 - AO1 High 2048 8+1 CF5741AB 25 25 Low (Pull-up resistor) High 1 31.25 Low (Pull-up resistor) Yes AO2/F High 32 - AO1 High 2048 8+1 CF5741BA 0 25 Low (Pull-up resistor) High 1 46.875 Low (Pull-up resistor) Yes AO2/F1 Low 2048 8+1 AO1 High 2048 8+1 CF5741BB 27 25 Low (Pull-up resistor) High 1 46.875 Low (Pull-up resistor) Yes AO2/F1 Low 2048 8+1 1. AO is complete reverse phase of AO. (even output is inactive.) ORDERING INFORMATION Device CF5741xx Package Chip form NIPPON PRECISION CIRCUITS--1 CF5741 series BLOCK DIAGRAM VDD VSS CG XT CD 4 Stage Divider 13 Stage Divider XTN RST/TC Reset Input AI Alarm Input Alarm Test AO Test Alarm Output Control Motor Output Control AO1 AO2/F OUT1 OUT2 PIN DESCRIPTION Number 1 2 3 4 5 6 7 8 9 10 Name VSS AO1 AO2 / F XTN XT VDD RST / TC AI OUT1 OUT2 Ground Alarm signal output1 Alarm signal output2/Frequency output Crystal oscillator connection Crystal oscillator connection Power supply pin Reset/Test clock input Alarm input Motor drive output 1 Motor drive output 2 Description Dimensions (m) X 147 147 147 146 146 1072 1073 1073 1072 1072 Y 1048 867 685 446 206 147 386 626 867 1048 NIPPON PRECISION CIRCUITS--2 CF5741 series SPECIFICATIONS Absolute Maximum Ratings Parameter Supply voltage Input voltage Operating temperature Storage temperature Symbol V DD - V SS V IN TOPR T STG Condition Rating - 0.3 to 5.0 V SS V IN V DD - 30 to 80 - 65 to 150 Unit V V C C Electrical Characteristics Ta = 25C, VDD = 1.5V, VSS = 0V, Xtal (fo = 32.768kHz, CI 35k), unless otherwise noted. Rating Parameter Supply voltage Current consumption Oscillator start-up time Motor output current Input resistance2(AI, RST/TC) Oscillator stability Symbol V DD IDD tSTA IMOT R IN f/f IOL1 Alarm output current (AO1, AO2/F) IOL2 IOH1 IOH2 Frequency output voltage Internal capacitance3 VF CG CD 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. V DD = 1.2V to 2.0V VOL = 0.75V VOL = 0.75V VOH = 0.75V VOH = 0.75V V DD = 1.2V, CL = 50pF 900 10 900 10 0.4 OUT1, OUT2 = Open V DD = 1.2V V DD = 1.5V V DD = 1.2V, RL = 2001 4.0 200 0.5 1200 1.0 Condition min 1.2 typ 1.5 1.2 max 2.0 4.0 5.0 2.0 V A sec sec mA k ppm / 0.1V A A A A V pF pF Unit NIPPON PRECISION CIRCUITS--3 CF5741 series FUNCTIONAL DESCRIPTION Motor Output Stepping motor drive type tPW OUT1 (Active High) tPW OUT2 (Active High) tCY 1sec tCY 1sec tCY : Needle period tPW : Pulse width Sweeping motor drive type OUT1 tCY 125msec OUT2 tCY 125msec tCY : Needle period tPW : Pulse width 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 tCY -125msec +0 Alarm Output Alarm input/output tON AI (Active Low) AO1 (Active High) fCY (Hz) *1 AO2/F (Active High) fPW(Hz) *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. AI (Active Low) fCY (Hz) AO1 (Active High) 1/2VDD 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 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 RST/TC (Active Low) tCPW tRES 125msec tCPW 0.9765625msec NIPPON PRECISION CIRCUITS--6 CF5741 series APPLICATION CIRCUITS CIN VDD Battery 1.5V Reset Switch Alarm Switch OUT1 RST/TC XTN Speaker AO2/F Transistor XT X'tal AI CF5741AA CF5741AB CF5741BA CF5741BB AO1 M OUT2 Stepping Motor VSS 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: 03-3642-6661 Facsimile: 03-3642-6698 NC9613DE 1998.08 NIPPON PRECISION CIRCUITS INC. NIPPON PRECISION CIRCUITS--7 |
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