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W55RFS27R1B data sheet 1 revision: a 3 .0 publish date: f eb. 2010 - 1 - revision a1 super - regeneration rf receiver W55RFS27R1B data sheet
W55RFS27R1B data sheet 2 revision: a 3 .0 publish date: f eb. 2010 - 2 - revision a1 contents general description 3 1.1 W55RFS27R1B features ................................ ................................ ................................ ............................ 3 1.2 W55RFS27R1B pad definition ................................ ................................ ................................ .................. 4 1.2.1 pad description ................................ ................................ ................................ .................... 4 1.2.2 mode selection ................................ ................................ ................................ ..................... 5 system description 6 2.1 W55RFS27R1B system block diagram ................................ ................................ ................................ .... 6 2.2 w55rfs2 7r1b functional description ................................ ................................ ................................ ..... 7 electronic characteristics 7 3.1 W55RFS27R1B absolute maximum ratings ................................ ................................ ............................ 7 3.2 W55RFS27R1B dc characteristics ................................ ................................ ................................ ........... 8 3.3 W55RFS27R1B ordering information ................................ ................................ ................................ ....... 8 3.4 W55RFS27R1B package information ................................ ................................ ................................ ........ 9 3.4.1 W55RFS27R1B bonding pad list ................................ ................................ ....................... 9 3.4.2 W55RFS27R1B bonding pad diagram ................................ ................................ ............. 10 design information 11 4.1 W55RFS27R1B reference design ................................ ................................ ................................ ........... 11 4.1.1 W55RFS27R1B application circuit ................................ ................................ .................. 11 4.2 W55RFS27R1B smart - detector wb function ................................ ................................ ............................ 12 4.2.1 introduction ................................ ................................ ................................ ........................ 12 4.2.2 using sm art - detector wb in manual - mode ................................ ................................ ......... 12 4.2.3 using smart - detector wb in uc - mode ................................ ................................ ................. 13 4.3 W55RFS27R1B layout guide ................................ ................................ ................................ ................. 13 4.4 W55RFS27R1B data sheet document history ................................ ................................ ........................ 14
W55RFS27R1B data sheet 3 revision: a 3.0 publish date: feb. 2010 - 3 - revision a1 general description nuvoton w55r f s 27r1 b is a fully integrated s - r (super - regenerative) rf receiver with full - function of baseband contro l command decoder for application of r/c vehicle, toy, or wireless data communication. W55RFS27R1B provides both uc - mode for general purpose micro - controller programming interface and manual - mode for rf receiver with on - chip 6 - function baseband command de coder. W55RFS27R1B provides smart - detector wb function which overcomes component deviation, maintain the best receiver sensitivity in mass - production. smart - detector wb is also capable of adjusting itself to fit various kinds of environmental problems. some factors like temperature, moisture, or object caused antenna characteristic change could be recovered by the smart - detector wb function. the super - regenerative rf front - end architecture is convenient for 27mhz ~ 49mhz manufacturing with minimum external co mponents. with wide range of operating voltage 2.1v ~ 5.5v, W55RFS27R1B is suitable for remote controlled toy on 2 - battery or 3 - battery application. w55r f s 27 r 1 b cooperate with w55r f s 27 t 1 b is easy and convenient to provide simple remote control function wi th long control distance and low production cost. 1.1 W55RFS27R1B features ? operating frequency: 27mhz,35mhz, 40mhz, 49mhz ? smart - detector wb function overcomes the components deviation and environmental problem and maintain best sensitivity in mass - production and operation ? operating voltage: 2. 1 v ~ 5.5v ? s - r (super - regeneration) de modulation scheme ? receiving data rates up to 1.25kbps for 50% duty cycle ? manual - mode s upports 6 - function baseband decoder, i,e, forward, backward, left - turn, right - ? turn, and 2 user defined function f1 and f2 ? minimization of current consumption in system ? very low power down current consumption ( uc - mode only) ? less manual adjustment needed in production ? fewer external components required in production ? lower manufacture produ ction cost ? dice form available for pcb bonding ? operating temperature: 0 ? c ~ 70 ? c
W55RFS27R1B data sheet 4 revision: a 3.0 publish date: feb. 2010 - 4 - revision a1 1.2 W55RFS27R1B pad definition 1.2.1 pad description ( * uc - mode control please refer to sec.4.2 smart - detector wb function) symbol p ad no. i/o functional description gnd 1 ground ground return path cmfb 2 o common - mode feedback capacitor co nnect rbias 3 i r esistor to adjust internal circuit bias rsaw 4 o r esistor to control internal saw generator vdda 5 power regulated voltage output oscin 6 i oscillator tank input oscout 7 o oscillator tank output gnda 8 ground r egulator ground retur n path reset 9 i reset=0 resets whole chip, internally pull - high mode0 1 0 i mode select lsb, please see 1.2.2 for detail mode1 11 i mode select msb, please see 1.2.2 for detail test 12 i test=1 reserved for chip testing, must be set 0 when operating. f2 13 o /i decoder f2 output / uc - mode = $enb ("0" power down)* f1 14 o /i decoder f1 output / uc - mode = not used (set 0 in uc - mode)* r 1 5 o /i decoder right - turn output / uc - mode =$hopclk (set 0 in uc - mode)* l 1 6 o /i decoder left - turn output / uc - mo de =$oagc2 (set 0 in uc - mode)* b 1 7 o /i decoder backward output / uc - mode =$oagc1 (set 1 in uc - mode)* f 1 8 o /i decoder forward output / uc - mode =$oagc0 (set 0 in uc - mode)* rxd 19 o /i receiver data output vsply 20 power power input
W55RFS27R1B data sheet 5 revision: a 3.0 publish date: feb. 2010 - 5 - revision a1 1.2.2 mode selection (mode1,mode0) function description note (0,0) disable smart - detector wb function function evaluation only (0,1) uc - mode , smart - detector wb function is external controlle d baseband decoder is disabled in this mode (1,0) enable half of smart - detector wb function oagc off , hopping on function evaluation only (1,1) enable smart - detector wb f unction oagc on, hopping on suitable for mass - production
W55RFS27R1B data sheet 6 revision: a 3.0 publish date: feb. 2010 - 6 - revision a1 system description 2.1 W55RFS27R1B system block diagram saw generator baseband decoder amp.& rectifier oscin power regulator f b l r f1 f2 mode0 power - on reset oscout s.c. filter rxd reset oscillator data slicer mode1 rsaw ring osc
W55RFS27R1B data sheet 7 revision: a 3.0 publish date: feb. 2010 - 7 - revision a1 2.2 W55RFS27R1B functional description power regulator W55RFS27R1B build - in on chip power regulator provides a stable operating performance under operating voltage from 2.1v ~ 5.5v, the very wide r ange of operating voltage is suitable for mini r/c toy or r/c vehicle application. especially for 2 - battery or 3 - battery . rf receiver W55RFS27R1B has been implemented by using "super - regenerative" receiving architecture for r/c toy application. the high noise immunity structure is very suitable for getting higher rf receiving performance in very high noise level environment. the smart - detector wb function overcomes component deviation and various environmental problems, maintain the best receiver sensitiv ity in mass - production and operation. baseband control function decoder W55RFS27R1B build - in 6 - function of general r/c toy baseband control function for r/c toy " f orward"; " b ackward"; " l eft - turn"; " r ight - turn", and 2 more reserved control functions of " f1 "; " f2 ". electronic characteristics 3.1 W55RFS27R1B absolute maximum ratings parameter rating unit supply voltage to ground potential - 0.3 to 6.5 v applied input/output voltage - 0.3 to 6.5 v power dissipation (t a = 70 ? ? ? note: exposure to conditions beyond those listed under absolute maximum ratings may adversely affect the life and reliability of th e device.
W55RFS27R1B data sheet 8 revision: a 3.0 publish date: feb. 2010 - 8 - revision a1 3.2 W55RFS27R1B dc characteristics (vdd - vss = 3 v, ta = 25 ? c; unless otherwise specified) parameter sym. conditions min. typ. max. unit power supply operating voltage v dd 2.1 - 5.5 v operating current i op - - 2.8 ma stand - by current i sby $enb= 0 - - 2 ? a regulated voltage vdda 1.65 1.8 2.1 v d igital input/output pin input high voltage v ih 0.8* v dd - v dd v input low voltage v il v ss - 0.1* v dd v f,b,l,r,f1,f2 output high source current i oh v oh =0.7 * v dd 6 - - ma f,b,l,r,f1,f2 output low sink current i ol v ol =0.3 * v dd 6 - - ma rxd output hig h source current i oh v oh =0.7 * v dd 2 - - ma rxd output low sink current i ol v ol =0.3 * v dd 2 - - ma crystal oscillator operation frequency f c 27 - 49.8 mhz on - chip ring oscillator frequency t osc 170 200 250 khz baseband decoder section modulation du ty cycle m dyt 40 50 60 % received data rate r dtt 50% duty - cycle manchester code - 1.25 - kbps 3.3 W55RFS27R1B ordering information W55RFS27R1B provides two types in shipment: dice form, and wafer form part number package remarks W55RFS27R1B(h) dic e form W55RFS27R1B(w) wafer form
W55RFS27R1B data sheet 9 revision: a 3.0 publish date: feb. 2010 - 9 - revision a1 3.4 W55RFS27R1B package information 3.4.1 W55RFS27R1B bonding pad list ---------------------------------------------------------------------------- --- window : (xl = - 929.000, yl = - 625.000), ( xh = 929.000, yh = 625.000) windows size : width = 1858.000, length = 1250.000 ============================================================================ === pad no pad name pin name x y ------------------------------------------------------ ---------------------- --- 1 * gnd * 1 - 13.000 540.000 2 cmfb 2 - 365.950 540.000 3 rbias 3 - 472.950 540.000 4 rsaw 4 - 579.950 5 40.000 5 vdda 5 - 689.350 540.000 6 vdda 5 - 801.150 540.000 7 oscin 6 - 795.075 - 540.000 8 oscout 7 - 667.875 - 540.000 9 gnda 8 - 555.150 - 540.000 10 reset 9 - 128.675 - 540.000 11 mode0 10 - 21.675 - 540.000 12 mode1 11 85.325 - 540.000 13 test 12 192.325 - 540.000 14 f2 13 302.925 - 540.000 15 f1 14 790.325 540.000 16 r 15 675.875 540.000 17 l 16 561.425 540.000 18 b 17 446.975 540.000 19 f 18 332.525 540.000 20 rxd 19 218.075 540.000 21 vsply 20 98.400 540.000 (*: bon ding sequence start from gnd(pin1))
W55RFS27R1B data sheet 10 revision: a 3.0 publish date: feb. 2010 - 10 - revision a1 3.4.2 W55RFS27R1B bonding pad diagram 1 2 3 4 5 6 7 1 9 1 8 1 7 1 6 1 5 2 1 2 0 1 1 1 0 9 1 3 1 2 1 4 8 W55RFS27R1B logo
W55RFS27R1B data sheet 11 revision: a 3.0 publish date: feb. 2010 - 11 - revision a1 design information 4.1 W55RFS27R1B reference design 4.1.1 W55RFS27R1B application circuit (* note: the components value is suitable for 15cm antenna. rsaw(r2) may need modified for different antenna.) a 1 1 we dne sda y, may 19, 200 4 a1 W55RFS27R1B application circuit s ize docu ment nu mber rev date: s hee t of v dd v dd v dd 27mhz: c1=15pf, c2=27pf, c3=27pf, l0=1.5uh, r2=36k 35mhz: c1=10pf, c2=24pf, c3=24pf, l0=1.2uh, r2=39k 40mhz: c1= 7pf, c2=16pf, c3=18pf, l0=.82uh, r2=51k 49mhz: c1= 4pf, c2=16pf, c3=18pf, l0=.82uh, r2=47k v dda a nt 1 c2 l0 c1 c4 10 0nf c3 r2(1%) + c7 10 u r3 16 k(1%) jp 2 output 1 2 3 4 5 6 u1 w5 5rfs 27r1b gnd 1 cmfb 2 rsa w 4 osci n 7 oscou t 8 v dda 6 b 18 r 16 f 19 l 17 f1 15 f2 14 res e t 10 mode 1 12 v dda 5 gnda 9 rbia s 3 te s t 13 mode 0 11 rxd 20 v sp ly 21 c6 47 n + c5 10 u jp 3 mode 0s el 1 2 3 jp 4 mode 1s el 1 2 3
W55RFS27R1B data sheet 12 revision: a 3.0 publish date: feb. 2010 - 12 - revision a1 W55RFS27R1B application schematic bom: item qty reference part ________________________________________________________________________________ 1 1 ant1 antenna 2 1 c1 4 pf 3 1 c2 1 6 p 4 1 c3 18p 5 1 c4 100nf 6 2 c7,c5 10u 7 1 c6 47n 8 1 jp2 output 9 1 jp3 mode0sel 10 1 jp4 mode1sel 11 1 l0 0.82 u 12 1 r2 47 k (1%) 13 1 r3 16k(1%) 14 1 u1 W55RFS27R1B 4.2 W55RFS27R1B smart - detector wb function 4.2.1 introdu ction smart - detector function enables on - chip oagc(oscillator auto - gain - control) and hopping clock function, is designed for recovery of components deviation and environment change. it dynamically searches the best operating condition and maintains best s ensitivity in various environments. the control mechanism is built with the communication protocol of w55rfs27t1bW55RFS27R1B, which is effective under manual - mode operation. while in uc - mode, the oagc and hopping must be fixed or be controlled by external mcu. 4.2.2 using smart - detector wb in manual - mode a). set [mode1:mode0]=[00] to disable smart - detector wb , then select a proper value for rsaw which makes the highest sensitivity. note the default value is set oagc[2:0] ={0,1,0}and hopclk=0. b). set [mod e1:mode0]=[11] to enable smart - detector wb . then the (oagc2,oagc1,oagc0) is switched by following sequence. hopclk repeats 0 and 1 toggle every t seconds. (1,0,0) t (1,0,0) t (0,1,1) t (0,0,0) t (0,0,1) t (0,1,0) t start ( t ~= 20ms)
W55RFS27R1B data sheet 13 revision: a 3.0 publish date: feb. 2010 - 13 - revision a1 c). if a data packet is received, W55RFS27R1B stops oagc and hopclk scan and holds the setting for a while(around 50ms), if no more data input, the oagc and hopclk scan will be active again. 4.2.3 using smart - detector wb in uc - mode a). in uc - mode , [mode1:mode0]=[01], oagc and hopclk are externally controlled. it can be fixed at a specif ic value or scanned as the sequence in manual - mode. b). when oagc and hopclk are fixed, it should be set (oagc2,oagc1,oagc0)=(0,1,0) and hopclk=0. c). if oagc and hopclk are scanned as the proposed sequence; the switching time t should be adjusted depends on the data repeat time of the associate transmitter. usually the switching time is twice the repeat transmission time of the transmitter. for example, if transmitter sends data every 10ms, then the switching time t should be 20ms. d). it is recommended to use fix setting (b) in uc - mode because it is difficult for mcu to control these pins. components quality should be well controlled for the stability of mass - production. 4.3 W55RFS27R1B layout guide a). antenna signal input path (ant - >c1 - >l0,c2,c3) must be short and without any noise source beside it. b). oscillation tank components (l0,c2,c3) must be placed together and as closer to ic oscin and oscout pins as possible. c). oscillator ground current return path (gnda) must be shortest and widest to ic g nda. it should be isolated with noise source, too. d). oscillation tanks ground is better to separate with other ground path and connect to chips gnda directly. antenna oscout gnda oscin l0 reduce loop area pic.1 graphic representation for a),b),c) antenna oscout gnda oscin l0 cob area gnd battery gnd motor driver & others pic.2 graphic representation for d)
W55RFS27R1B data sheet 14 revision: a 3.0 publish date: feb. 2010 - 14 - revision a1 4.4 W55RFS27R1B data sheet document history revision date descri ption a1 .0 may 2004 preliminary version a2 .0 jul. 2004 formal released version a3 .0 feb. 2010 logo changed
W55RFS27R1B data sheet 15 revision: a 3.0 publish date: feb. 2010 - 15 - revision a1 important notice nuvoton products are neither intended nor warranted for usage in systems or equipment, any malfunction or failure of which may cause loss of human life, bodily injury or severe property damage. such applications are deemed, insecure usage. insecure usage includes, but is not limited to: equipment for su rgical implementation, atomic energy control instruments, airplane or spaceship instruments, the control or operation of dynamic, brake or safety systems designed for vehicular use, traffic signal instruments, all types of safety devices, and other applica tions intended to support or sustain life. all insecure usage shall be made at customers risk, and in the event that third parties lay claims to nuvoton as a result of customers insecure usage, customer shall indemnify the damages and liabilities thus incurred by nuvoton .

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