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W55RFS27T1B data sheet 1 revision: a 3 .0 publish date: feb. 2010 - 1 - revision a1 super - regeneration rf transmitter W55RFS27T1B data sheet
W55RFS27T1B data sheet 2 revision: a 3 .0 publish date: feb. 2010 - 2 - revision a1 contents general description 3 1.1 features ................................ ................................ ................................ ................................ ...... 3 1.2 W55RFS27T1B pad definition ................................ ................................ ................................ . 4 1.2.1 pad description ................................ ................................ ................................ . 4 1.2.2 clock frequency select (cks el) setup ................................ ............................ 4 1.2.3 uc - mode & manual mode (baseband data rate) setup ................................ ... 5 1.2.4 baseband encoder control function description ................................ .............. 5 system description 6 2.1 W55RFS27T1B system block diagram ................................ ................................ .................... 6 2.2 W55RFS27T1B fu nctional description ................................ ................................ .................... 6 electronic characteristics 7 3.1 W55RFS27T1B absolute maximum ratings ................................ ................................ ............ 7 3.2 W55RFS27T1B dc characteristics ................................ ................................ ........................... 7 3.3 W55RFS27T1B ordering information ................................ ................................ ...................... 8 3.4 W55RFS27T1B package informa tion ................................ ................................ ........................ 9 3.4.1 bonding pad list ................................ ................................ ................................ 9 3.4.2 bonding pad diagram ................................ ................................ ........................ 9 design inf ormation 10 4.1 W55RFS27T1B reference design ................................ ................................ .......................... 10 4.1.1 txout waveform ................................ ................................ ........................... 10 4.1.2 application circuit for 6 control functions ................................ ..................... 11 4.1.3 application circuit for 4 control functions ................................ ..................... 12 4.1.4 application circui t for fcc ................................ ................................ ............. 13 4.2 uc - mode control signal ................................ ................................ ................................ .......... 13 4.3 w55rfs27t family fcc certification ................................ ................................ ................... 14 4.4 W55RFS27T1B data sheet document history ................................ ................................ ....... 15
W55RFS27T1B data sheet 3 revision: a 3 .0 publish date: feb. 2010 - 3 - revision a1 general description nuvoton w55r f s 27t1 b is a fully integrated s - r (super - regeneration) rf transmitter with full - function of baseband command encoder for applic ation of r/c vehicle, toy, or wireless data communication. W55RFS27T1B provides both uc - mode for general purpose of micro - controller programming interface and manual - mode for rf transmitter as well as 6 - function of baseband command encoder. w55r f s 27t1 b c ooperate with w55r f s 27 r 1 b is very easy and convenient to provide simple remote control function with very low production cost in various application. the transmitter provides the fcc/etsi regulation provisions for 27m, 35m, 40m, 49mhz s - r (super - regenerati on) modulation . wide range of operation voltage from 2.2v to 5.5v is suitable for 2 - battery or 3 - battery r/c toy application, and high efficient transmission output power. W55RFS27T1B is compliant to fcc part 15 class b and 15.227 / etsi 300 220 - 1, making it easier for wireless end products to get fcc and etsi compliance approval. 1.1 features ? operating frequency: 27mhz ~ 49mhz ? wide operating voltage: 2.2v ~ 5.5v ? transmission data rates up to 10 k bps (uc - mode) for 3 0 % - 70 % duty cycle ? high efficiency transmission output power. ? manual - mode s upports 6 - function of r/c toy baseband control command encoder, i,e, forward, backward, left - turn, right - turn, and 2 user defined function f1 and f2 ? high efficient transmission power with minimum current consumption ? power down current consumption less than 1ua ? less manual adjustment needed in production ? f ew er external components required in production ? l ow er manufacture production cost ? compliant to fcc part 15 class b and 15.227 / etsi 300 220 - 1 low - power & short - ra nge device requirements ? two input modes for flexibility of more control function and lower component cost ? dice form available for pcb bonding ? operating temperature: 0 ? c ~ 70 ? c
W55RFS27T1B data sheet 4 revision: a 3 .0 publish date: feb. 2010 - 4 - revision a1 1.2 W55RFS27T1B pad definition 1.2.1 pad description symbol p ad no. i/o fu nctional description s 3 1 i manual - mode input, internally pull - high s 4 2 i manual - mode input , internally pull - high cksel 0 3 i clock source frequency select lsb ( please see section 1.2.2 for setup ) test 4 i test=0 for 6 - function mode, test=1 for 4 - func tion mode cksel 1 5 i clock source frequency select msb ( please see section 1.2.2 for setup ) ant 6 o rf signal output. a n external matching circuit is necessary for connect ing with an a ntenna. gnd 7 ground ground return path vdd 8 power power path res et 9 i reset=0 resets whole chip, internally pull - high x1 10 i input of internal crystal oscillator to connect with an external crystal x2 11 o output of internal crystal oscillator to connect with an external crystal id1 12 i id setting msb ( please se e section 1.2.3 for setup ) id0 13 i id setting lsb ( please see section 1.2.3 for setup ) txout 14 o txd data output s1/~txd 15 i manual - mode input or uc - mode: ~ txd, internally pull - high s2/~enb 16 i manual - mode input or uc - mode: ~ enb, internally pull - hi gh 1.2.2 clock frequency select (cksel) setup (cksel1,cksel0) clock frequency (0,0) 27.145mhz (0,1) 35.48 mhz (1,0) 40.68 mhz (1,1) 49.86 mhz
W55RFS27T1B data sheet 5 revision: a 3 .0 publish date: feb. 2010 - 5 - revision a1 1.2.3 uc - mode & manual mode (baseband data rate) setup (id1,id0) function encoder time base (0,0) d ata rate= 2.5kbps t=200us (0,1) data rate= 1.25kbps t=400us (1,0) data rate= 0.625kbps t=800us (1,1) uc - mode external controlled (note: w55rfs27r1b data rate=1.25kbps; w55rfs27r1a data rate=2.5kbps) 1.2.4 baseband encoder control function descrip tion input pin name connect to 6 - function (test=0) 4 - function (test=1) s1 default (pull high) f = 0, b = 0 f = 0 gnd f = 0, b = 1 f = 1 txout f = 1, b = 0 - s2 default (pull high) f = 0, b = 0 b = 0 gnd f = 0, b = 1 b = 1 txout f = 1, b = 0 - s3 default (pull high) f1 = 0 l = 0 gnd f1 = 1 l = 1 s4 default (pull high) f2 = 0 r = 0 gnd f2 = 1 r = 1 (note: f ? forward; b ? backward; l ? left - turn; r ? right - turn; f1 , f2 ? two user - defined function)
W55RFS27T1B data sheet 6 revision: a 3 .0 publish date: feb. 2010 - 6 - revision a1 system description 2.1 W55RFS27T1B s ystem block diagram 2.2 W55RFS27T1B functional description w 55rf s 27t1b provides two operation modes for convenient remote control product development, named manual - mode and uc - mode . the manual - mode provide s a powerful baseband command encoder , which perform 6 - function binary data encode and , modulate with the on - chip rf power amplifier to transmit control command. the control function can be at most to 6 functions, f orward, b ackward, l eft - turn, r ight - turn for pa encoder control circuit s1 oscillation (27~49mhz) x ant x1 x2 txout vdd gnd reset s2 s3 s4 id n cksel por ? test $enb $txd
W55RFS27T1B data sheet 7 revision: a 3 .0 publish date: feb. 2010 - 7 - revision a1 general r / c - vehicle contro l and 2 other user - defined functions f1 and f2 . it is very suitable for remote control applications if w 55rf s 27t1b and its associated receiver/decoder w 55rf s 27 r1 b are adopted. the very pair provides extremely low - cost and high - performance function for de sign of various remote - control applications. the uc - mode provides digital interface for external micro - controller to control the transmitter easily and efficiently. the micro - controller only need two pins, txd (s1) to send data and enb (s2) to enter power down mode, if needed. the transmitter provides the fcc/etsi regulation provisions for 27m, 40mhz and 49mhz s - r (super - regeneration) modulation . wide range of operation voltage from 2.2v to 5.5v is suitable for 2 - battery or 3 - battery r/c toy application, a nd 15dbm high efficient transmission output power. W55RFS27T1B super - regeneration rf transmitter is compliant to fcc part 15 class b and 15.227 / etsi 300 220 - 1, making it easier for wireless end products to get fcc and etsi compliance approval. elec tronic characteristics 3.1 W55RFS27T1B 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. 3.2 W55RFS27T1B dc characteristics (vdd - vss = 3 v, ta = 25 ? c; unless ot herwise specified) parameter sym. conditions min. typ. max. unit power supply
W55RFS27T1B data sheet 8 revision: a 3 .0 publish date: feb. 2010 - 8 - revision a1 operating voltage v dd 2.2 - 5.5 v operating current (uc - mode) i tx continuous emission - - 50 ma stand - by current i sby - - 1 ? a digital input/output pin (s1, s2, s3, s4, id0, id1, mode,cksel0,cksel1) input high voltage v ih 0.8* v dd - v dd v input low voltage v il v ss - 0.1* v dd v input pin pull - high resistance r ph s1~s4, reset - 150k - ohm txout output high source current i oh v oh =0.7 * v dd 6 - - ma txout output low sink current i ol v ol =0.3 * v dd 6 - - ma crystal oscillator operation frequency f xtl 27 - 49 mhz oscillator turn - on time t osc fundamental type - - 1.0 ms over - tone type - - 3.0 ms transmitter section modulation duty cycle m dyt 30 50 70 % transmis sion data rate r dtt 50% duty - cycle manchester code - 1.25 10 kbps transmission power p ant - 15 - dbm notes: (1). crystal turn - on time depends on crystal type: fundamental or overtone type crystal. (2). transmitter settling time depends on cr ystal type: fundamental or overtone type crystal. 3.3 W55RFS27T1B ordering information W55RFS27T1B provides two forms in shipment: dice form, and wafer form part number package remarks W55RFS27T1B(h) dice form - W55RFS27T1B(w) wafer form -
W55RFS27T1B data sheet 9 revision: a 3 .0 publish date: feb. 2010 - 9 - revision a1 3.4 W55RFS27T1B package information 3.4.1 bonding pad list window : (xl = - 620.000, yl = - 635.000),(xh = 620.000, yh = 635.000) windows size : width = 1240.000, length = 1270.000 ======================================================================== ==== === pad no pad name pin name x y ---------------------------------------------------------------------------- --- 1 s3 1 - 535.000 - 69.260 2 s4 2 - 535.000 - 360.520 3 cksel0 3 - 535.000 - 484.865 4 test 4 66.325 - 550.000 5 cksel1 5 173.325 - 550.000 6 ant 6 282.725 - 550.000 7 * vss * 7 535.000 - 218.395 8 vdd 8 535.000 20.945 9 reset 9 535.000 284.600 10 x1 10 245.005 550.000 11 x2 11 138.005 550.000 12 id1 12 31.005 550.000 13 id0 13 - 75.995 550.000 14 txout 14 - 288.420 550.000 15 s1 15 - 535.000 329.000 16 s2 16 - 535.000 37.740 ============================================================================ === (*: bonding sequence start from vss(pin7)) 3.4.2 bonding pad diagram 14 15 16 1 2 3 4 5 6 *7 8 9 10 11 12 13 W55RFS27T1B logo
W55RFS27T1B data sheet 10 revision: a 3 .0 publish date: feb. 2010 - 10 - revision a1 design information 4.1 W55RFS27T1B reference design 4.1.1 txout waveform 1 key released 16 power down 2 1 16 2 ant txout 1 16 2 ant txout test test any ke y pressed test=0 test=1 stop
W55RFS27T1B data sheet 11 revision: a 3 .0 publish date: feb. 2010 - 11 - revision a1 4.1.2 application circuit for 6 control functions set test = 0, 1. used when need f1 and f2.(more than 4 control functions) 2. when use 9v battery, an ex ternal power switch is required for power - saving 3. need extra components to light led W55RFS27T1B application schematic bom(6 - function): item qty reference part ________________________________________________________________________________ 1 1 c7 240p 2 2 c8,c9 7p 3 3 c13,c19,c33 47n 4 1 c18 10u 5 1 l1 39nh 6 2 l2,l7 1uh 7 1 r1 20k 8 1 u1 W55RFS27T1B 9 1 y1 49.86mhz {do c} {re vco de} w5 5rfs 27t 3b ap pl ic atio n ci rcui t (49mhz) a 1 1 t ues day, jul y 06, 200 4 t itl e s ize docu ment nu mber rev date: s hee t of v dd v sp ly v dd v dd v dd v dd v dd dependent on antenna led control circuit overtone crystal input protection for 49mhz * 27mhz,(l1,c7)= (56nh, 470pf), (l7,c33)=none * 35mhz,(l1,c7)= (47nh, 360pf), (l7,c33)=(3.3uh,47n) * 40mhz,(l1,c7)= (47nh, 300pf), (l7,c33)=(2.2uh,47n) * 49mhz,(l1,c7)= (39nh, 240pf), (l7,c33)=(1uh,47n) id0 id1 1n41 48 d2 l2 1u h jp 7 id1 1 2 3 30 0 r5 jp 6 id0 1 2 3 a nt e nna r1 20 k c7 24 0p s w1 fo rward 1n41 48 d1 c19 47 n s w2 b ackward l7 1u h r4 1k le d le d1 + c18 10 u c13 47 n 10 0u c0 s w3 le ft tu rn s w5 f1 l1 39 nh r3 1k 49 .8 6mhz c8 7p c9 7p c33 47 n s w6 f2 s w4 rig ht turn u1 w5 5rfs 27t 3b t xout 14 x2 11 cks e l0 3 v dd 8 v ss 7 a nt 6 cks e l1 5 res e t 9 s4 2 s3 1 s2 16 s1 15 id1 12 id0 13 t es t 4 x1 10 jp 3 p ower in 1 2 b t1 b at s1 s1 cks e l0 t xout id1 s2 s2 id0 t xout t xout cks e l1 cks e l0 cks e l1 s2 s1
W55RFS27T1B data sheet 12 revision: a 3 .0 publish date: feb. 2010 - 12 - revision a1 10 1 led1 led (optional) 11 1 c0 100u (optional) 12 2 d2,d1 1n4148 (optional) 1 3 1 r5 300 (optional) 1 4 2 r4,r3 1k (optional) 4.1.3 application circuit for 4 control functions set test = 1, 1. only 4 control functions provided 2. no need to add external power switch when use 9v battery. 3. led can be directly driven by txout {do c} {re vco de} w5 5rfs 27t 1b ap pl ic atio n ci rcui t (49mhz) a 1 1 t ues day, ma y 0 4, 2 004 t itl e s ize docu ment nu mber rev date: s hee t of v dd v dd v dd v dd v dd dependent on antenna overtone crystal for 49mhz * 27mhz,(l1,c7)= (56nh, 470pf), (l7,c33)=none * 35mhz,(l1,c7)= (47nh, 360pf), (l7,c33)=(3.3uh,47n) * 40mhz,(l1,c7)= (47nh, 300pf), (l7,c33)=(2.2uh,47n) * 49mhz,(l1,c7)= (39nh, 240pf), (l7,c33)=(1uh,47n) id0 id1 v dd l2 1u h jp 7 id1 1 2 3 jp 6 id0 1 2 3 a nt e nna r1 20 k c7 24 0p l7 1u h c13 47 n s w3 le ft-tu rn l1 39 nh 49 .8 6mhz c8 7p c9 7p c33 47 n s w4 rig ht-t urn u1 w5 5rfs 27t 1b t xout 14 x2 11 cks e l0 3 v dd 8 v ss 7 a nt 6 cks e l1 5 res e t 9 s4 2 s3 1 s2 16 s1 15 id1 12 id0 13 t es t 4 x1 10 le d le d1 30 0 r5 s w1 fo rward s w2 b ackward d3 4.3v r5 12 0 b t1 9v c19 47 n + c18 47 0u d2 1n41 48 d1 1n41 48 d4 1n41 48 d3 1n41 48 cks e l0 id1 id0 t xout cks e l1 cks e l0 cks e l1 t xout
W55RFS27T1B data sheet 13 revision: a 3 .0 publish date: feb. 2010 - 13 - revision a1 4.1.4 application circuit for fcc 4.2 uc - mode control signal power down oscillator s1(~txd) s2(~enb) chip enabled chip disabled 3ms ant {do c} {re vco de} w5 5rfs 27t 1b ap pl ic atio n ci rcui t for fcc(27mhz) a 1 1 we dne sda y, ju ly 14 , 20 04 t itl e s ize docu ment nu mber rev date: s hee t of v dd v dd fundamental crystal dependent on antenna l2 5.6u h a nt e nna c8 10 0p c13 10 0p s w3 le ft-tu rn l1 27 0nh s w4 rig ht-t urn u1 w5 5rfs 27t 1b t xout 14 x2 11 cks e l0 3 v dd 8 v ss 7 a nt 6 cks e l1 5 res e t 9 s4 2 s3 1 s2 16 s1 15 id1 12 id0 13 t es t 4 x1 10 le d le d1 30 0 r5 s w1 fo rward s w2 b ackward b t1 2.2~5.5v c19 47 n + c18 10 0u l3 2.2u h c7 10 0p c6 15 p l4 2.2u h 27 .1 45mhz t xout t xout
W55RFS27T1B data sheet 14 revision: a 3 .0 publish date: feb. 2010 - 14 - revision a1 4.3 w55rfs27t family fcc certification
W55RFS27T1B data sheet 15 revision: a 3 .0 publish date: feb. 2010 - 15 - revision a1 4.4 W55RFS27T1B data sheet document history revision date description a1 .0 may 2004 preliminary v ersion a2 .0 jul. 2004 formal released version a3 .0 feb. 2010 logo changed 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 surgical implementation, atomic energy control instruments, airplane or spaceship instrumen ts, the control or operation of dynamic, brake or safety systems designed for vehicular use, traffic signal instruments, all types of safety devices, and other applications intended to support or sustain life. all insecure usage shall be made at customer s 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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