CF5760 series CMOS Analog Clock IC OVERVIEW The CF5760 series 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××) (Unit: mm) (760, 1210) 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 Pad size: 100 × 100 µm Reverse side: VDD level SERIES CONFIGURATION CF5760AA CF5760BA CF5760CC CF5760DA CF5760EA CF5760FC CF5760GB CF5760HA CG [pF] 3 3 3 3 3 27 3 3 25 25 33 25 25 33 26 25 25 HIGH/LOW HIGH/LOW LOW/HIGH LOW/HIGH –/LOW LOW/HIGH LOW/HIGH LOW/HIGH LOW/HIGH LOW LOW HIGH LOW – – HIGH HIGH – 1 1 1 1 1 0.0625 1 1 0.0625 23.4 23.4 31.25 27.3 1000 62.5 31.25 46.875 62.5 Built-in capacitance1 C [pF] D Alarm input/reset input level Active level Motor output Needle period tCY [s] Pulsewidth tPW [ms] Pins Active level CF5760JA 3 AO AON AO HIGH LOW HIGH AON F (32kHz) AO AON AO HIGH LOW HIGH Frequency Alarm output fPW [kHz] 4 4 DC – Modulation fCY [Hz] 8 8 – – 8+1 8+1 IOH min [µA] 900 900 900 10 900 IOL min [µA] 900 900 10 10 900 2 2 AON F (32kHz) AO AON – – AO AON AO AON AO AON AO HIGH LOW HIGH LOW HIGH LOW HIGH DC – – – 2 2 2 2 2 2 – – – – 8+1 8+1 8+1 8+1 8+1 8+1 900 900 10 – – 900 900 900 900 900 900 10 10 – – 900 900 10 10 900 AON F (32kHz) DC – – – 900 900 10 900 10 10 1. Built-in capacitance includes the parasitic capacitance. ORDERING INFORMATION Device Package CF5760×× Chip form SEIKO NPC CORPORATION —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 AON Alarm output 2 615 505 8 XTN Oscillator output 615 746 9 XT Oscillator input 615 1065 SEIKO NPC CORPORATION —2 CF5760 series SPECIFICATIONS Absolute Maximum Ratings Parameter Rating Unit VDD − VSS −0.3 to 5.0 V Input voltage range VIN VSS ≤ VIN ≤ VDD V Operating temperature range Topr −30 to 80 °C Storage temperature range Tstg −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 Parameter Symbol Condition Unit min typ max 1.2 – 2.0 V Operating voltage VDD Current consumption IDD O1 = O2 = open – 1.2 4.0 µA Oscillator start-up time tSTA VDD = 1.2V – – 5.0 s Motor output current IMOT VDD = 1.2V, RL = 200Ω1 4.0 – – mA AI/R HIGH-level input current IIH VDD = 1.5V 2 4 8 µA AI/R LOW-level input current IIL VDD = 1.5V 2 4 8 µA Oscillator frequency stability ∆f/f VDD = 1.2 to 2.0V – 0.5 1.0 ppm/0.1V Alarm LOW-level output current2 (AO, AON) IOL1 VDD = 1.5V, VOL = 0.75V 900 2000 – µA IOL2 VDD = 1.5V, VOL = 0.75V 10 30 – µA IOH1 VDD = 1.5V, VOH = 0.75V 900 2000 – µA IOH2 VDD = 1.5V, VOH = 0.75V 10 30 – µA VDD = 1.2V, CL = 50pF 0.4 – – V Alarm HIGH-level output current2 (AO, AON) F output voltage3 Internal capacitance4 VF CG CD pF Refer to the SERIES LINEUP pF 1. RL is the load resistance connected between O1 and O2. 2. CF5760AA/ CC/ FC/ HA: If the outputs (AO or AON) are short circuit, the output current is IAO ≥ 900 µA. 3. The F output voltage rating, VF , when a load capacitance, CL, is connected between pin F and VSS, is the difference voltage between the center voltage, 0.5VDD, and the peak voltage. 4. CG is the capacitance between VDD and XT. CD is the capacitance between VDD and XTN. SEIKO NPC CORPORATION —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) tON < 62.5ms: input is ignored. 62.5 ≤ tON ≤ 125ms: indeterminate tON > 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. SEIKO NPC CORPORATION —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 +0 tCY 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. fPW = alarm fundamental frequency fCY = 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). SEIKO NPC CORPORATION —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 Motor CG XT O1 XTN O2 M Bell M X'tal Reset Switch AO AI/R F 3kΩ Alarm Switch VSS SEIKO NPC CORPORATION —6 CF5760 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 1-9-9, Hatchobori, Chuo-ku, Tokyo 104-0032, Japan Telephone: +81-3-5541-6501 Facsimile: +81-3-5541-6510 http://www.npc.co.jp/ Email: [email protected] NC9812DE 2006.04 SEIKO NPC CORPORATION —7