CF5760 series seiko npc corporation ? 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. vari- ous alarm functions and motor outputs are available to match a wide range of clock speci?ations. features 1.2 to 2.0v operating supply voltage 1.2? (typ) / 1.5v current consumption 32.768 khz oscillator circuit oscillator capacitance c g and c d built-in alarm output function reset function (optional seconds control function) input chattering elimination function (ai/r) chip form (CF5760 ) pad layout (unit: mm) series configuration ordering information chip size: 0.76 1.21 mm chip thickness: 300 ?30 ? pad size: 100 100 ? reverse side: v dd level 1 xt vss (0,0) 2 3 45 9 8 7 6 xtn aon ao vdd o1 ai/r o2 ha5760 (760, 1210) CF5760aa CF5760ba CF5760cc CF5760da CF5760ea CF5760fc CF5760gb CF5760ha CF5760ja built-in capacitance 1 1. built-in capacitance includes the parasitic capacitance. c g [pf] 3333332733 c d [pf] 25 25 33 25 25 33 26 25 25 alarm input/reset input level high/low high/low low/high low/high ?low low/high low/high low/high low/high motor output active level low low high low high high needle period t cy [s] 11111 0.0625 1 1 0.0625 pulsewidth t pw [ms] 23.4 23.4 31.25 27.3 1000 62.5 31.25 46.875 62.5 alarm output pins ao aon ao aon ao aon ao aon ao aon ao aon ao aon ao aon ao aon active level high low high f (32khz) high low high f (32khz) high low high low high low high f (32khz) frequency f pw [khz] 44dc 22dc 222222dc modulation f cy [hz] 8 8 8 + 1 8 + 1 8 + 1 8 + 1 8 + 1 8 + 1 8 + 1 8 + 1 i oh min [ a] 900 900 900 10 900 900 900 10 900 900 900 900 900 900 900 10 i ol min [ a] 900 900 10 10 900 900 10 10 900 900 10 10 900 900 10 10 device package CF5760 chip form
CF5760 series seiko npc corporation ? block diagram pad description/dimensions no. name description dimensions [m] xy 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 7 stage divider 9 stage divider reset input alarm input alarm output control motor output control vdd vss ao aon o1 o2 xt ai/r xtn c d c g
CF5760 series seiko npc corporation ? specifications absolute maximum ratings electrical characteristics ta = 25 c, v dd = 1.5v, v ss = 0v, c g = 23pf, c d = 25pf, x tal (f 0 = 32.768khz, c i = 50k ? max) unless oth- erwise noted parameter symbol condition rating unit supply voltage range v dd ? v ss ? 0.3 to 5.0 v input voltage range v in v ss v in v dd v operating temperature range t opr ? 30 to 80 c storage temperature range t stg ? 65 to 150 c parameter symbol condition rating unit min typ max operating voltage v dd 1.2 2.0 v current consumption i dd o1 = o2 = open 1.2 4.0 ? oscillator start-up time t sta v dd = 1.2v 5.0 s motor output current i mot v dd = 1.2v, r l = 200 ? 1 1. r l is the load resistance connected between o1 and o2. 4.0 ma ai/r high-level input current i ih v dd = 1.5v 2 4 8 ? ai/r low-level input current i il v dd = 1.5v 2 4 8 ? oscillator frequency stability ? f/f v dd = 1.2 to 2.0v 0.5 1.0 ppm/0.1v alarm low-level output current 2 (ao, aon) 2. CF5760aa/ cc/ fc/ ha: if the outputs (ao or aon) are short circuit, the output current is i ao 900 a. i ol1 v dd = 1.5v, v ol = 0.75v 900 2000 ? i ol2 v dd = 1.5v, v ol = 0.75v 10 30 ? alarm high-level output current 2 (ao, aon) i oh1 v dd = 1.5v, v oh = 0.75v 900 2000 ? i oh2 v dd = 1.5v, v oh = 0.75v 10 30 ? f output voltage 3 3. the f output voltage rating, v f , when a load capacitance, c l , is connected between pin f and vss, is the difference voltage between the center volt- age, 0.5v dd , and the peak voltage. v f v dd = 1.2v, c l = 50pf 0.4 v internal capacitance 4 4. c g is the capacitance between vdd and xt. c d is the capacitance between vdd and xtn. c g refer to the series lineup pf c d pf
CF5760 series seiko npc corporation ? functional description motor output motor output waveform (step motor driver) motor output waveform (sweep motor driver) input chattering elimination function (ai/r) a bounce delay is provided on the ai/r input to eliminate erroneous operation caused by input bounce (chat- tering). 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. t on < 62.5ms: input is ignored. 62.5 t on 125ms: indeterminate t on > 125ms: input is accepted. o1 (active high) o2 (active high) t pw t pw t cy t cy : needle period t pw : pulse width t cy o1 o2 t cy 62.5ms t cy : needle period t pw : pulse width t cy 62.5ms t pw 62.5ms t pw 62.5ms t on ai/r (active low)
CF5760 series seiko npc corporation ? 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 rst motor out- put pulse occurs on the output pin opposite to that which had the last output pulse immediately before the reset. alarm output alarm output waveform 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). *1: opposite phase to ao. f pw = alarm fundamental frequency f cy = alarm modulation frequency o1 (active high) o2 (active high) t pw t pw t cy t cy ai/r (active low) t cy +0 ? 125msec t on ao (active high) ai/r (active high) aon (active low) f pw (hz ) f cy (hz ) t on *1
CF5760 series seiko npc corporation ? typical application circuits alarm (high)/reset (low), piezoelectric alarm reset (high)/alarm (low), dc output, f output aon xtn x'tal ao vss vdd xt cg alarm switch reset switch o2 o1 ai/r m 3k? piezo speaker f xtn x'tal ao vss vdd xt cg alarm switch reset switch o2 o1 ai/r m motor bell m 3k ?
CF5760 series seiko npc corporation ? nc9812de 2006.04 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 ?roducts? are not intended to be used for the apparatus that exerts harmful in?ence 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 ?pc?. 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 speci?ations 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 t his 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 modi?ation. 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 req uested 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: sales@npc.co.jp
|
