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1 ds04-21600-3e fujitsu semiconductor data sheet assp for dts bipolar prescaler with vco (dual-modulus, 1.0 ghz) MB551 n description the MB551 is a dual-modulus prescaler incorporating a voltage controlled oscillator (vco) used for 900-mhz band frequency synthesizers. the MB551 consists of: a colpitts oscillator with grounded base capacitor, a buffer ampli?r with collector open output, a prescaler interface circuit, and a dual-modulus prescaler operating at frequencies divided by 128/129. the oscillator block accommodates external components such as a capacitor, a dielectric oscillator (resonator), and a variable capacitor, making up the vco. the vco and the prescaler are connected by an internal control circuit, minimizing the effects of prescaler input load variation on vco characteristics such as a c/n ratio. the MB551 operates at 5 v (typical) and draws 16 ma of current (typical). n features oscillator frequency: 1 ghz (max) low power consumption: i cc = 16 ma (typical) oscillator output power: 0 dbm (typical) c/n ratio: 70 db (typical) measurement conditions: d f = 50 khz, bw = 15 khz 65 db (typical) measurement conditions: d f = 25 khz, bw = 15 khz s/n ratio: 45 db (typical) measurement conditions: bw = 0.3 to 3 khz, 3 khz.dev, 1 khz tone stable oscillator output supply voltage dependence: 200 khz/v (typical) frequency stability: 35 ppm/ c (typical) (continued) n package 8 pin plastic sop (fpt-8p-m01)
2 MB551 (continued) pulse swallow method: division-by-128/129 prescaler prescaler output with termination circuit: v l = 1.6 v p - p n pin assignment n timing diagram (example of dual-modulus, division-by-128/129 type) m pin = high: division by 128 m pin = low: division by 129 (v ih = 2.0 v min, v il = 0.8 v max.) division plus one makes the high-to-low transition longer by one cycle of the frequency-divided signal. setup time (t set ) from input of the m signal to change in the divide ratio of the prescaler is 16 ns (typical). (top view) (fpt-8p-m01) f vco v cc m out gnd e c b 8 7 6 5 1 2 3 4 pin no. symbol function 1f vco vco signal pin 2v cc power supply pin 3 m module setting pin 4 out prescaler output pin 5 b oscillator transistor base pin 6 c oscillator transistor collector pin 7 e oscillator transistor emitter pin 8 gnd ground pin 64 cycles 65 cycles 64 cycles 64 cycles 64 64 65 64 65 64 64 129 cycles 128 cycles t set t set 64 64 64 64 in out m
3 MB551 n block diagram 50 p 50 p 250 p 400 p bias circuit 0.5 p 3 p e cf vco b v cc vco block d c xq f1 d c q f3 m d c q f2 d c xq f4 q f5 f6 d c xq q d c xq q d c xq f7 q d c xq f8 q out 33 p ref m prescaler block
4 MB551 n absolute maximum ratings (see warning) warning: permanent device damage may occur if the above absolute maximum ratings are exceeded. functional operation should be restricted to the conditions as detailed in the operational sections of this data sheet. exposure to absolute maximum rating conditions for extended periods may affect device reliability. n recommended operating conditions parameter symbol rating unit remarks power supply voltage v cc ?.5 to +7.0 v oscillator transistor base/emitter applied voltage v b, v e do not apply external dc voltage to the base or emitter pin. m/out (pin 3/4) applied voltage v p1 ?.5 to v cc +0.5 v f vco /c (pin 1/6) applied voltage v p2 v cc v p2 < +7.0 v applied current i p 10 ma storage temperature t stg ?5 to +125 c parameter symbol value unit remarks min. typ. max. power supply voltage v cc 4.5 5.0 5.5 v external variable capacitor control voltage v t 1.5 4.5 v operating temperature ta ?0 +85 c prescaler output load cl 8 pf
5 MB551 n electrical characteristics 1. vco block note: electrical characteristics depend on external components and mounting conditions. these values are reference values assuming the test circuit examples on pages 6 and 7. 2. prescaler block parameter symbol value unit remarks min. typ. max. oscillator frequency f osc 1000 mhz oscillator output p out ?dbm c/n ratio c/n 70 db df = 50 khz, bw = 15 khz 65 db df = 25 khz, bw = 15 khz s/n ratio s/n 45 db bw = 0.3 to 3 khz, 3 khz, dev, tone 1 khz fundamental/1st harmonic ratio sp? ?0 db frequency stability d f t 35 ppm/ c ?0 to 85 c, 25 c (typical) supply voltage variation d f r 200 khz/v 5 v 10% conversion gain d f osc 4 mhz/v control range: 1.0 to 4.0 v parameter symbol value unit remarks min. typ. max. power supply current i cc 16.0 ma output amplitude v out 1.0 1.6 v p-p load capacitance when internal termination pin is used: 8 pf or less response frequency f in 1000 mhz allowable input power v in ? +10 dbm high-level input voltage (mc) v ih 2.0 v v il 0.8 v high-level input current (mc) i ih 0.4 ma i il ?.2 ma module setup time t set ?626 ns
6 MB551 n test circuit example 1 gnd 8 e 7 c 6 b 5 1 pf 2 pf 3 pf 0.01 m f MB551 1 234 f vco v cc m out 20 pf out put (50 w ) 20 pf v cc (1.5 v) 20 pf 0.01 m f 20 pf 51 pf 0.01 m f m high impedance prober (sampling scope) 51 pf 22 nh 20 pf 4 pf 1500 mhz 2 pf 51 pf 82 nh isv164 vt 390 w 56 nh chip capacitor: umk316c, umk212c, ucn103c series (taiyo yuden) chip coil: lqn2a series (murata works) dielectric oscillator: drr060ue (murata works) varicap: isv164 (nec)
7 MB551 n test circuit example 2 gnd 8 e 7 c 6 b 5 1.5 pf 2 pf 3 pf 0.01 m f MB551 1 234 f vco v cc mf out 20 pf out put (50 w ) 20 pf v cc (+5 v) 20 pf 0.01 m f 20 pf 51 pf 0.01 m f m high impedance prober (sampling scope) 22 nh 20 pf 4 pf 1500 mhz 3 pf 51 pf 82 nh ma333 vt 390 w 56 nh 51 pf chip capacitor: umk316c series (taiyo yuden) chip coil: lqn2a series (murata works) dielectric oscillator: drr060ue (murata works) varicap: ma333 (mitsubishi electric)
8 MB551 n recommended pc board pattern c8 c9 c2 c3 r1 c10 c11 c12 c13 c7 c6 l1 c16 c15 c4 dielectric oscillator c5 c1 l3 c14 l2 m v cc c17 vd out (4) (1) (3) (5) (7) pin pre out vt index c1: 1 pf (taiyo yuden umk212c) c2: 2 pf (taiyo yuden ucn103c) c3: 3 pf (taiyo yuden umk212c) c4: 4 pf (taiyo yuden umk212c) c5: 2 pf (taiyo yuden umk212c) c6: 20 pf (taiyo yuden umk316c) c7: 51 pf (taiyo yuden umk212c) c8: 20 pf (taiyo yuden umk316c) c9: 20 pf (taiyo yuden umk316c) c10: 51 pf (taiyo yuden umk212c) c11: 20 pf (taiyo yuden umk316c) c12: 51 pf (taiyo yuden umk212c) c13: 20 pf (taiyo yuden umk316c) c14: 51 pf (taiyo yuden umk212c) c15: 0.01 m f (film capacitor) c16: 0.01 m f (film capacitor) c17: 0.01 m f (film capacitor) r1: 390 w (rohm mcr25) l1: 22 nh (murata works lqn2a) l2: 56 nh (murata works lqn2a) l3: 82 nh (murata works lqn2a) vd: 1sv164 (nec) dielectric oscillator: (murata works drr060 series, 1.5 ghz) [mounted component list]
9 MB551 n measurement results (1) supply current (2) oscillation waveform (50-khz span) 15.0 20.0 4.5 5.0 5.5 v cc (v) i cc (ma) ta = +25 c typ = 16 ma output level (dbm) frequency
10 MB551 n measurement results (test circuit 1 on recommended pc board) (1) conversion gain (2) supply voltage variation 1.0 2.0 3.0 4.0 5.0 845 855 865 d f osc = 4.2 mhz/v v t (v) v cc = 5.0 v ta = +25 c f osc (mhz) 4.5 855.50 v cc ?i v ?j v t = 2.5 v ta = +25 c f osc ?i mhz ?j 5.0 5.5 855.75 856.00 856.25 856.50 d f osc = +430 khz/v
11 MB551 (3) c/n, s/n control voltage dependence supply voltage dependence 1.0 2.0 3.0 4.0 5.0 50 60 70 80 v t (v) v cc = 5.0 v ta = +25 c c/n (db) s/n (db) s/n c/n ( d 25 khz) c/n ( d 50 khz) 40 50 4.5 5.0 5.5 50 60 70 80 v cc (v) v t = 2.5 v ta = +25 c c/n (db) s/n (db) c/n ( d 25 khz) 40 50 s/n c/n ( d 50 khz)
12 MB551 n measurement results (1) prescaler input sensitivity curve supply voltage dependence (ta = +25 c) temperature dependence (v cc = 5 v) 1.0 1.4 1.8 0.6 input sensitivity vin (dbm) vin (dbm) input frequency fin (ghz) v cc = 4.5 v v cc = 5.0 v v cc = 5.5 v ?0 ?0 ?0 0 +10 +20 datasheet spec 1.0 1.4 1.8 0.6 input sensitivity vin (dbm) vin (dbm) input frequency fin (ghz) ta = ?0 c ta = +25 c ta = +85 c ?0 ?0 ?0 0 +10 +20 datasheet spec
13 MB551 n measurement results ( test circuit 2 ) (1) conversion gain (2) c/n, s/n 1.0 2.0 3.0 4.0 5.0 830 845 860 d f osc = 7.5 mhz/v v t (v) f osc (mhz) v cc = 5.0 v ta = +25 c control voltage dependence 1.0 2.0 3.0 4.0 5.0 50 60 70 80 v t (v) c/n (db) s/n (db) c/n ( d 25 khz) 40 50 s/n v cc = 5.0 v ta = +25 c
14 MB551 n application example gnd 8 e 7 c 6 b 5 3 pf MB551 1 2 f vco v cc m 20 pf 0.01 m f 1 pf 2 pf 20 pf 4 pf 1500 mhz 2 pf 51 pf 22 nh 1sv164 56 nh 20 pf 3 1000 pf 4 out 20 pf v cc (5 v) v cc (5 v) 390 w lpf 10 k w 10 k w 12 k w 12 k w 10 k w 33 k w 10 k w lock det. 1000 pf local frep. 47 k w v cc clock data le fin mldd o 47 k w 47 k w 0.047 m f ck si stb v cc (5 v) v cc (5 v) v cc (5 v) v cc osc in 15 14 s 3 13 s 2 12 s 1 11 f p 10 f r 9 osc out v cc (5 v) c1 c2 mb87001a 12345678 16
15 MB551 n ordering information part number package remarks MB551pf 8 pin plastic sop (fpt-8p-m01)
16 MB551 n package dimension 8 pin plastic sop (fpt-8p-m01) +0.40 C0.20 +.016 C.008 +0.05 C0.02 +.002 C.001 +0.25 C0.20 +.010 C.008 3.81(.150)ref 1.27(.050) typ index 6.80 .268 0.15 .006 6.35 .250 (.307.016) (.209.012) (.018.004) (stand off) (.020.008) 0.500.20 5.300.30 7.800.40 0.05(.002)min 2.25(.089)max 0.450.10 details of "a" part 0.50(.020) 0.20(.008) 0.18(.007)max 0.68(.027)max "a" m ?0.13(.005) 0.10(.004) 1994 fujitsu limited f08002s-4c-4 c dimensions in mm (inches) (mounting height)
24 fujitsu limited for further information please contact: japan fujitsu limited corporate global business support division electronic devices kawasaki plant, 4-1-1, kamikodanaka nakahara-ku, kawasaki-shi kanagawa 211-88, japan tel: (044) 754-3763 fax: (044) 754-3329 north and south america fujitsu microelectronics, inc. semiconductor division 3545 north first street san jose, ca 95134-1804, u.s.a. tel: (408) 922-9000 fax: (408) 432-9044/9045 europe fujitsu mikroelektronik gmbh am siebenstein 6-10 63303 dreieich-buchschlag germany tel: (06103) 690-0 fax: (06103) 690-122 asia paci? fujitsu microelectronics asia pte. limited #05-08, 151 lorong chuan new tech park singapore 556741 tel: (65) 281-0770 fax: (65) 281-0220 f9703 ? fujitsu limited printed in japan all rights reserved. the contents of this document are subject to change without notice. customers are advised to consult with fujitsu sales representatives before ordering. the information and circuit diagrams in this document presented as examples of semiconductor device applications, and are not intended to be incorporated in devices for actual use. also, fujitsu is unable to assume responsibility for infringement of any patent rights or other rights of third parties arising from the use of this information or circuit diagrams. fujitsu semiconductor devices are intended for use in standard applications (computers, office automation and other office equipment, industrial, communications, and measurement equipment, personal or household devices, etc.). caution: customers considering the use of our products in special applications where failure or abnormal operation may directly affect human lives or cause physical injury or property damage, or where extremely high levels of reliability are demanded (such as aerospace systems, atomic energy controls, sea floor repeaters, vehicle operating controls, medical devices for life support, etc.) are requested to consult with fujitsu sales representatives before such use. the company will not be responsible for damages arising from such use without prior approval. any semiconductor devices have inherently a certain rate of failure. you must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. if any products described in this document represent goods or technologies subject to certain restrictions on export under the foreign exchange and foreign trade control law of japan, the prior authorization by japanese government should be required for export of those products from japan.

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