CF5705 series Analog Watch Stepping Motor Driver NIPPON PRECISION CIRCUITS INC. OVERVIEW The CF5705 series is a low-current analog watch stepping motor driver CMOS IC with built-in 32.768 kHz crystal oscillator circuit. FEATURES ■ ■ 32.768 kHz crystal oscillator circuit CG and CD built-in −3.6 to −1.2 V operating supply voltage range ■ Operating current consumption • VSS = –1.55V, CD = 16pF: 250 nA (max) • VSS = –2.8V, CD = 26pF: 1000 nA (max) Note: Current consumption depends on the built-in capacitor. ■ Reset function 4 Hz and subsequent frequency dividers are reset SERIES LINEUP P ad coordinates Built-in capacitor 1 Motor Version 1 2 3 4 5 6 7 8 C y c le (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 CF5705BC VSS RESET XT XTN VDD OUT2 OUT1 TEST 250m 23.4m 125m 4 26 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 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: C G = C D = 4pF PART NUMBER GUIDE CF5705 Function(Motor, Built-in capacitor) Pad coordinate ORDERING INFORMATION D e vice P ackag e C F 5 7 0 5 ×× Chip form NIPPON PRECISION CIRCUITS—1 CF5705 series PAD DIMENSIONS (Top view) PAD COORDINATES Number X ( µm ) Y ( µm ) 1 155 785 2 155 597 3 155 363 4 155 175 (1000,1060) NPC 2 HA5705 1 8 7 5 844 175 3 6 6 844 363 4 5 7 844 694 8 844 882 (0,0) Chip size: 1.000 × 1.060 m m Chip thickness: 220 µm P ad size: 100 × 100 µm R e verse side: V D D 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 Cr ystal oscillator circuit input XTN Cr ystal oscillator circuit output OUT1 Stepping motor driver output 1 OUT2 Stepping motor driver output 2 RESET Reset input TEST Test mode select. 512 Hz clock output Pin nu m b e r : Refer to Series lineup. NIPPON PRECISION CIRCUITS—2 CF5705 series SPECIFICATIONS Absolute Maximum Ratings VDD = 0 V P arameter Symbol Rating Unit Supply voltage range VSS −5.0 to 0.3 V Input voltage range V IN V S S − 0.3 to 0.3 V Storage temperature range T stg −40 to 125 °C Symbol Rating Unit Supply voltage VSS −3.6 to −1.2 V Operating temperature To p g −20 to 75 °C Recommended Operating Conditions P arameter Electrical Characteristics VDD = 0 V, Ta = 25 °C, X’tal CI = 55kΩ max Rating P arameter Operating supply voltage Operating current Symbol consumption 1 ID D IR S T Reset input resistance R RST Motor output current IM O T Motor output cycle time 2 (normal mode) TCY Motor output cycle time 2 (test mode) tC Y pulsewidth 2 TPW voltage 2 V S TA Oscillator start Oscillator start time Frequency voltage deviation Frequency deviation 3 Internal capacitance 2 Unit min typ max −2.0 − −1.2 V No load, V S S = –1.55V, (C T R + C G ) = 15 pF, C D = 16 pF – 0.15 0.25 µA No load, V S S = –2.8V, (C T R + C G ) = 24 pF, C D = 26 pF – 0.40 1.00 µA R E S E T : V RST = V DD , V SS = – 1.55V – 6 – nA R E S E T : V R S T = V D D , V S S = –2.8V – 25 100 nA V R S T = −1.35 V, V S S = –1.55V 15 35 60 kΩ V R S T = −2.6 V, V S S = –2.8V 5 15 50 kΩ R L = 2 k Ω , V S S = −1.55 V 0.7 – – mA R L = 1 k Ω , V S S = −2.4 V 2.18 2.29 – mA VSS Reset input current Motor output Condition s Refer to the SERIES LINEUP ms ms −1.3 – – V T S TA From supply ON to 512 Hz output on T E S T – 2 5 s ∆f/f V S S = −1.2 → −3.6 V, C T R = 5 p F – 0.2 1 ppm/0.1V Built-in C D –8 – 8 ppm Built-in C D and C G – 16 – 16 ppm ε’ C G , CD (C G + C D ) < 62 pF 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 (C D = 16pF) ε’ = [f (2.8V) – f’0 ] / f’0 (C D = 26pF) f’0 : Oscillation frequency center value of Standard Deviation in the same measuring conditions NIPPON PRECISION CIRCUITS—3 CF5705 series Measurement Circuit VDD CTR RESET A IRST XT TEST CD XTN X'tal VSS OUT1 OUT2 A IMOT RL Cr ystal: f = 32.768 kHz, CI = 20 kΩ , C0 = 1.3pF, C1 = 2.6fF NIPPON PRECISION CIRCUITS—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 93.75 ms or greater, otherwise the reset is ignored. When the reset pulse is valid, the 4 Hz 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. NIPPON PRECISION CIRCUITS—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 512 Hz rectangular wave is output on TEST. Note that the output load (probe) must be greater than 10 MΩ and less than 20 pF. 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 512 Hz clock (TCH > 3.9 ms), 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 125 ms. 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. NIPPON PRECISION CIRCUITS—6 CF5705 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 fo r 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 NC9815AE 2000.07 NIPPON PRECISION CIRCUITS—7