CF5760 series CMOS Analog Clock IC NIPPON PRECISION CIRCUITS INC. OVERVIEW The CF5760 series devices are analog clock ICs that derive their timing from a 32.768 kHz oscillator element. They feature a reset function (optional seconds control function) which can be used to maintain accurate time. Various alarm functions and motor outputs are available to match a wide range of clock specifications. FEATURES ■ ■ ■ ■ ■ ■ ■ ■ PAD LAYOUT 1.2 to 2.0V operating supply voltage 1.2µA (typ) / 1.5V current consumption 32.768 kHz oscillator circuit Oscillator capacitance CG and CD built-in Alarm output function Reset function (optional seconds control function) Input chattering elimination function (AI/R) Chip form (CF5760××) Top view VDD 1 AI/R 2 O1 3 O2 4 9 XT 8 XTN 7 AON 6 AO 5 VSS HA5760 (0,0) Chip size: 0.76 × 1.21 mm Chip thickness: 300 ± 30 µm P ad size: 100 × 100 µm R e verse side: V D D level SERIES CONFIGURATION CF5760AA C F 5 7 6 0 BA CF5760CC C F 5 7 6 0 DA CF5760EA CF5760FC CF5760HA 3 3 3 3 3 3 3 3 25 25 33 25 25 33 25 25 H I G H / L OW H I G H / L OW LOW/HIGH LOW/HIGH –/LOW LOW/HIGH LOW/HIGH LOW/HIGH LOW LOW HIGH LOW – – HIGH – 1 1 1 1 1 0.0625 1 0.0625 23.4 23.4 31.25 27.3 1000 62.5 46.875 62.5 C G (pF) Built-in capacitance 1 C (pF) D Alarm input/reset input level Active level Motor output Needle period tC Y (s) Pulsewidth tP W (ms) Pins Alarm output AO AO N AO AO N F AO AO N AO AO N F C F 5 7 6 0 JA AO AO N AO AO N AO AO N AO – – HIGH LOW HIGH LOW HIGH AO N F HIGH LOW HIGH – 2 2 DC – – – 2 2 2 2 DC – – – 8+1 8+1 – – – – 8+1 8+1 8+1 8+1 – – 900 900 10 900 900 900 10 – – 900 900 900 900 900 10 900 10 10 900 900 10 10 – – 900 900 900 900 10 10 Active level HIGH LOW HIGH Frequency fP W (kHz) 4 4 DC Modulation fC Y (Hz) 8 8 IO H min ( µA) 900 IO L min ( µA) 900 (32kHz) (32kHz) (32kHz) 1. Built-in capacitance includes the parasitic capacitance. ORDERING INFORMATION D e vice P ackag e C F 5 7 6 0 ×× Chip form NIPPON PRECISION CIRCUITS—1 CF5760 series BLOCK DIAGRAM VDD VSS 7 Stage Divider 9 Stage Divider CG XT CD XTN Reset Input AI/R Alarm Input Motor Output Control Alarm Output Control AO O1 AON O2 PAD DESCRIPTION/DIMENSIONS Dimensions (µm) No. Name Description X Y 1 VDD Supply 155 1065 2 AI/R Alarm input and reset input 155 854 3 O1 Motor output 1 155 620 4 O2 Motor output 2 145 145 5 VSS Ground 615 145 6 AO Alarm output 1 615 325 7 AO N Alarm output 2 615 505 8 XTN Oscillator output 615 746 9 XT Oscillator input 615 1065 NIPPON PRECISION CIRCUITS—2 CF5760 series SPECIFICATIONS Absolute Maximum Ratings P arameter Rating Unit VDD − VSS −0.3 to 5.0 V Input voltage range V IN V S S ≤ V IN ≤ V D D V Operating temperature range T opr −30 to 80 °C Storage temperature range T stg −65 to 150 °C Supply voltage range Symbol Condition Electrical Characteristics Ta = 25°C, VDD = 1.5V, VSS = 0V, CG = 23pF, CD = 25pF, X’tal (f0 = 32.768kHz, CI = 50kΩ max) unless otherwise noted Rating P arameter Symbol Condition Unit min typ max 1.2 – 2.0 V Operating voltage VDD Current consumption ID D O1 = O2 = open – 1.2 4.0 µA Oscillator start-up time tS TA V D D = 1.2V – – 5.0 s Motor output current IM O T V D D = 1.2V, R L = 200 Ω 1 4.0 – – mA AI/R HIGH-level input current IIH V D D = 1.5V 2 4 8 µA AI/R LOW -level input current IIL V D D = 1.5V 2 4 8 µA Oscillator frequency stability ∆f/f V D D = 1.2 to 2.0V – 0.5 1.0 ppm/0.1V Alarm L OW -level output current 2 (AO , AO N ) IO L 1 V D D = 1.5V, V O L = 0.75V 900 2000 – µA IO L 2 V D D = 1.5V, V O L = 0.75V 10 30 – µA Alarm HIGH-level output current 2 (AO , AO N ) IO H 1 V D D = 1.5V, V O H = 0.75V 900 2000 – µA IO H 2 V D D = 1.5V, V O H = 0.75V 10 30 – µA V D D = 1.2V, C L = 50pF 0.4 – – V F output voltage 3 Internal capacitance 4 VF CG CD pF Refer to the SERIES LINEUP pF 1. R L is the load resistance connected between O1 and O2. 2. CF5760AA/ CC/ FC/ HA: If the outputs (AO or AON) are shor t circuit, the output current is I A O ≥ 900 µA. 3. The F output voltage rating, V F, when a load capacitance, C L , is connected between pin F and V S S , is the difference voltage between the center voltage, 0.5V D D , and the peak voltage. 4. C G is the capacitance between V D D a n d X T. C D is the capacitance between VDD and XTN. NIPPON PRECISION CIRCUITS—3 CF5760 series FUNCTIONAL DESCRIPTION Motor Output Motor output waveform (step motor driver) tPW O1 (Active High) tPW O2 (Active High) tCY tCY tCY : Needle period tPW : Pulse width Motor output waveform (sweep motor driver) tPW 62.5ms O1 tCY tCY 62.5ms 62.5ms tCY : Needle period tPW : Pulse width O2 tPW 62.5ms Input Chattering Elimination Function (AI/R) A bounce delay is provided on the AI/R input to eliminate erroneous operation caused by input bounce (chattering). tON AI/R (Active Low) tO N < 62.5ms: input is ignored. 62.5 ≤ tO N ≤ 125ms: indeterminate tO N > 125ms: input is accepted. Input Control Functions When AI/R is open circuit, a 256Hz signal is output. When AI/R is HIGH or LOW, it selects the alarm (HIGH)/reset (LOW) function or reset (HIGH)/alarm (LOW) function depending on the version. NIPPON PRECISION CIRCUITS—4 CF5760 series Reset Function (optional seconds control function) When AI/R goes active level for a reset, the motor output stops. When the reset is released, the first motor output pulse occurs on the output pin opposite to that which had the last output pulse immediately before the reset. AI/R (Active Low) tPW tON O1 (Active High) tPW O2 (Active High) tCY tCY +0 tCY −125msec Alarm Output Alarm output waveform tON AI/R (Active High) AO (Active High) fCY (Hz) fPW(Hz) *1 AON (Active Low) *1: Opposite phase to AO . fP W = alarm fundamental frequency fC Y = alarm modulation frequency F Output Function The AON pin may be replaced by the F pin which is used to output a 32kHz signal (unaffected by the reset function). NIPPON PRECISION CIRCUITS—5 CF5760 series TYPICAL APPLICATION CIRCUITS Alarm (HIGH)/Reset (LOW), Piezoelectric alarm VDD CG XT O1 XTN O2 M X'tal 3kΩ Alarm Switch AO Piezo Speaker AI/R AON Reset Switch VSS Reset (HIGH)/Alarm (LOW), DC Output, F Output VDD CG XT O1 XTN O2 M Motor Bell M X'tal Reset Switch AO AI/R F 3kΩ Alarm Switch VSS NIPPON PRECISION CIRCUITS—6 CF5760 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 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. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome Koto-ku, Tokyo 135-8430, Japan Telephone: 03-3642-6661 Facsimile: 03-3642-6698 NC9812BE 2000.09 NIPPON PRECISION CIRCUITS—7