CF5705 series Analog Watch Stepping Motor Driver OVERVIEW The CF5705 series are low-current analog watch stepping motor driver CMOS ICs with built-in 32.768kHz crystal oscillator circuit. FEATURES ■ ■ 32.768kHz crystal oscillator circuit CG and CD built-in −3.6 to −1.2V operating supply voltage range ■ Operating current consumption • VSS = –1.55V, CD = 16pF: 250nA (max) • VSS = –2.8V, CD = 26pF: 1000nA (max) Note: Current consumption depends on the built-in capacitor. ■ Reset function 4Hz and subsequent frequency dividers are reset SERIES LINEUP Pad coordinates Built-in capacitor1 Motor Version 1 2 3 4 5 6 7 8 Cycle (Tcy/2) [sec] Pulse (Tpw) [sec] Test (Tcy) [sec] CG [pF] CD [pF] CF5705AA XT XTN RESET VSS TEST OUT2 OUT1 VDD 1 4.9m 125m 4 16 CF5705AD XT XTN RESET VSS TEST OUT2 OUT1 VDD 1 23.4m 125m 4 30 CF5705AE XT XTN RESET VSS TEST OUT2 OUT1 VDD 20 5.9m 125m 4 16 CF5705AK XT XTN RESET VSS TEST OUT2 OUT1 VDD 62.5m 23.4m 125m 4 30 CF5705BC VSS RESET XT XTN VDD OUT2 OUT1 TEST 250m 23.4m 125m 4 26 CF5705BJ VSS RESET XT XTN VDD OUT2 OUT1 TEST 1 23.4m 125m 4 26 CF5705CF VSS TEST XTN XT VDD OUT2 OUT1 RESET 1 4.9m 62.5m 4 16 CF5705CG VSS TEST XTN XT VDD OUT2 OUT1 RESET 1 3.9m 62.5m 4 16 1. Parasitic capacitance is included. Parasitic capacitance: CG = CD = 4pF PART NUMBER GUIDE CF5705 Function (Motor, Built-in capacitor) Pad coordinate ORDERING INFORMATION Device Package CF5705×× Chip form SEIKO NPC CORPORATION —1 CF5705 series PAD DIMENSIONS PAD COORDINATES (Unit: µm) Number X [µm] Y [µm] 1 155 785 2 155 597 3 155 363 4 155 175 5 844 175 6 844 363 7 844 694 8 844 882 (1000,1060) NPC 2 HA5705 1 8 7 3 6 4 5 (0,0) Chip size: 1.000 × 1.060mm Chip thickness: 220µm Pad size: 100 × 100µm Reverse side: VDD level BLOCK DIAGRAM RESET XT TEST 32kHz Oscillator XTN OUT1 Divider and Output buffer control Voltage regulator OUT2 PAD DESCRIPTION Name Description VSS Negative supply voltage VDD Positive supply voltage XT Crystal oscillator circuit input XTN Crystal oscillator circuit output OUT1 Stepping motor driver output 1 OUT2 Stepping motor driver output 2 RESET Reset input TEST Test mode select. 512Hz clock output Pin number: Refer to Series lineup. SEIKO NPC CORPORATION —2 CF5705 series SPECIFICATIONS Absolute Maximum Ratings VDD = 0V Parameter Symbol Rating Unit Supply voltage range VSS −5.0 to 0.3 V Input voltage range VIN VSS − 0.3 to 0.3 V Storage temperature range Tstg −40 to 125 °C Symbol Rating Unit Supply voltage VSS −3.6 to −1.2 V Operating temperature Topg −20 to 75 °C Recommended Operating Conditions Parameter Electrical Characteristics VDD = 0V, Ta = 25°C, X’tal CI = 55kΩ max Rating Parameter Operating supply voltage Operating current consumption1 Reset input current Symbol IDD Motor output current RRST IMOT Motor output cycle time2 (normal mode) TCY Motor output cycle time2 (test mode) tCY Motor output pulsewidth2 TPW Oscillator start voltage2 VSTA Oscillator start time TSTA Frequency voltage deviation ∆f/f Frequency deviation3 Internal capacitance 2 ε’ C G , CD Unit min typ max −3.6 − −1.2 V No load, VSS = –1.55V, (CTR + CG) = 15pF, CD = 16pF – 0.15 0.25 µA No load, VSS = –2.8V, (CTR + CG) = 24pF, CD = 26pF – 0.40 1.00 µA RESET: VRST = VDD , VSS = –1.55V – 6 – nA RESET: VRST = VDD , VSS = –2.8V – 25 100 nA VRST = −1.35V, VSS = –1.55V 15 35 60 kΩ VRST = −2.6V, VSS = –2.8V 5 15 50 kΩ RL = 2kΩ, VSS = −1.55V 0.7 – – mA RL = 1kΩ, VSS = −2.4V 2.18 2.29 – mA VSS IRST Reset input resistance Condition s Refer to the SERIES LINEUP ms ms −1.3 – – V From supply ON to 512Hz output on TEST – 2 5 s VSS = −1.2 → −3.6V, CTR = 5pF – 0.2 1 ppm/0.1V Built-in CD –8 – 8 ppm Built-in CD and CG – 16 – 16 ppm (CG + CD) < 62pF Refer to the SERIES LINEUP pF 1. Current consumption is measured in the measurement circuit (see next page). 2. Refer to Series lineup. 3. ε’ = [f (1.55V) – f’0] / f’0 (CD = 16pF) ε’ = [f (2.8V) – f’0] / f’0 (CD = 26pF) f’0: Oscillation frequency center value of Standard Deviation in the same measuring conditions SEIKO NPC CORPORATION —3 CF5705 series Measurement Circuit VDD CTR RESET A IRST TEST XT CD XTN X'tal VSS OUT1 OUT2 A IMOT RL Crystal: f = 32.768kHz, CI = 20kΩ, C0 = 1.3pF, C1 = 2.6fF SEIKO NPC CORPORATION —4 CF5705 series FUNCTIONAL DESCRIPTION Motor Output Waveform TPW VDD OUT1 VSS TPW VDD OUT2 TCY/2 VSS TCY/2 The motor output waveform cycle time and output pulsewidth are set by mask option. Reset Function T < TON T > TON VDD RESET (open) VSS TPW VDD OUT1 VSS VDD OUT2 TCY/2 TCY/2 TD VSS Reset operation A reset operation occurs when RESET is held HIGH (VDD) for a period of 93.75ms or greater, otherwise the reset is ignored. When the reset pulse is valid, the 4Hz and subsequent frequency dividers are reset. Reset Release When the reset is released, the first output pulse occurs on the output pin opposite the output pin where the preceding motor drive output pulse occurred; first pulse occurs on OUT1 if previous motor drive pulse occurred on OUT2, and vice versa. A delay of TCY/2 − 0.125 to TCY/2 takes place from when reset is released until the first output pulse occurs. SEIKO NPC CORPORATION —5 CF5705 series Test Function T < Tch T > Tch VDD TEST VSS TCY/2 TCY/2 tCY/2 tCY/2 VDD OUT1 VSS TPW VDD OUT2 TPW TPW VSS Normal mode (TEST = open circuit) In test mode, a 512Hz rectangular wave is output on TEST. Note that the output load (probe) must be greater than 10MΩ and less than 20pF. The motor drive outputs on OUT1 and OUT2 continue to operate normally. Test mode 1 (TEST = VDD) Test mode 1 is invoked when TEST is held HIGH for a minimum of 2 cycles of the 512Hz clock (TCH > 3.9ms), otherwise it is ignored. In test mode 1, high-speed motor output operation occurs, with the cycle time set by mask option to 62.5 or 125ms. Test mode 2 (TEST = VSS) Test mode 2 is a dedicated IC test mode. In test mode 2, the device operates at 32-times speed, with the supply voltage connected directly to the oscillator circuit. Note that if a reset input occurs, the internal operation is reset and device output stops. Once operation stops, normal operation is not restored until TEST is either open circuit or goes LOW. SEIKO NPC CORPORATION —6 CF5705 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] NC9815CE 2006.04 SEIKO NPC CORPORATION —7