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d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA easy to use telemetry system using alpha modules features ? 3 digital i/o ? serial data output ? connects directly to alpha modules ? easy enc / dec pairing function ? receiver acknowledge signal ? minimal external components required ? performs all encoding/decoding of data for reliable operation . ? fast activation / deactivation time ? up to 30 transmitter pairings ? sleep mode, for battery saving ? one to many / many to one relationship. applications ? remote control ? radio telemetry ? rfid description the rf803e/d-alpha series are powerful yet simple e ncoder and decoder devices. when combined with an rf solutions ltd alpha module they may be u sed to create a remote control system with up to 3 i/o lines. the rf803e/d-alpha also offer a feedba ck function when used with alpha-trx (transceiver) module they can acknowledge all trans missions for ultimate reliability. the decoder ic incorporates an ?easy learn? pairing procedure to create a relationship between encoder and decoder. rf803 series ics perform all the necessary data ma nipulation and encoding/decoding of data for an optimum range reliable radio link whilst providing a simple user interface. part number description packages available rf803e-alpha rf803e-alpha-so rf803e-alpha-sot rf803e-alpha-q encoder ic 14 pin pdip soic tape & reel 16 pin qfn rf803d-alpha rf803d-alpha-so rf803d-alpha-sot rf803d-alpha-q decoder ic 14 pin pdip soic tape & reel 16 pin qfn
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 2 2 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA transmitter encoder rf803e-alpha functional description the rf803e-alpha is a simple device to use. as show n in the application circuit below, it requires only the addition of input switches and an alpha-trx rf module for use as the transmitter in an end application. transmission is automatic without user intervention. the id is designed to run in continuous sleep mode; on detecting a switch closure the rf803e-aplha will wake up transmit a secure data pa cket on the tx output. the rf803e-alpha can be set as a simple transmit de vice, or, to expect an acknowledgement signal back from the decoder. the type of transmissions to send may also be confi gured ? transmit only on state change, ? transmit continuously whilst input is active. block diagram
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 3 3 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA pin descriptions rf803e-alpha soic/pdip pin nu mber name input / output description 1 vdd - voltage in +3.3v 2 ack led o/p acknowledge failed (active high) 3 tx led2 o/p tx led (active high) 4 ack i/p (*) acknowledge request (active low) 5 cont i/p (*) continuous tx (active low) 6 clk o/p clock to alpha module pin 13 7 irq i/p to alpha module pin 2 8 sdi i/p serial data in to alpha module pin 1 9 sdo o/p serial data out to alpha module pin 12 10 sel o/p to alpha module pin 14 11 i/p3 i/p input 3 12 i/p2 i/p input 2 13 i/p1 i/p input 1 14 vss - ground vqfn pin number name input / output description 1 ack led o/p acknowledge failed (active high) 2 tx led2 o/p tx led (active high) 3 ack i/p (*) acknowledge request (active low) 4 cont i/p (*) continuous tx (active low) 5 clk o/p clock to alpha module pin 13 6 irq i/p to alpha module pin 2 7 sdi i/p serial data in to alpha module pin 1 8 sdo o/p serial data out to alpha module pin 12 9 sel o/p to alpha module pin 14 10 i/p3 i/p input 3 11 i/p2 i/p input 2 12 i/p1 i/p input 1 13 vss - ground 14 do not connect 15 do not connect 16 vdd - voltage in +3.3v (*) pull up / pull down required.
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 4 4 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA ip 1-3 these are the switch inputs which when operated wak e up the rf803e-alpha and cause transmission. they may be switched directly to grou nd. transmission occurs for the duration of the switch operation. ack failed led this output is normally low, asserted high when a t ransmission fails. a transmission is re-tried 5 times when an acknowledgement is not immediately received. if none is received after the 5 re-try attempts, the output will be asserted. tx led while transmitting the tx output will toggle at hig h frequency (flicker led) when the transmission is finished the output will be asserte d continuously for 2 seconds to show that an acknowledgement has been received. ack ? acknowledge request this pin is used to set an acknowledgement request from the receiver or not. only enable when using trx modules. cont ? continuous tx low : in this mode the rf803e-alpha will transmit cont inuously while an input is asserted, and stop when it is released. high: in this mode the rf803 will transmit only when an input changes state. vcc the power supply needs to be a stable regulated vol tage between 2.5 and 5.5v with <10mv ripple. note that in idle mode the transmitter curr ent drain is typically only 100na. gnd ground connection
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 5 5 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA application circuit connecting to your alpha module:
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 6 6 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA receiver decoder rf803d-alpha functional description the rf803d-alpha is simple to use. as shown in the typical application circuit below, the rf803d-alpha has the capability to learn up to 30 u nique rf803e-alpha transmitters. the digital outputs may be configured as latching o r momentary action. latch = the output will change state on each successive transmit of the encoder. momentary = the output will only operate for as long as the rf803e-alpha encoder is transmitting. the rf803d-alpha can be configured to work with an alpha trx or tx by setting the tx/trx pin. block diagram
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 7 7 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA pin descriptions rf803d-alpha soic / pdip pin number name input / outpu t description 1 vdd - voltage in +3.3v 2 lrn btn i/p learn button input 3 lrn led o/p learn / rx led 4 mom/latch i/p (*) momentary / latching select 5 serial o/p o/p serial data output (low level) 6 clk o/p to alpha module pin 13 7 irq i/p to alpha module pin 2 8 sdi i/p to alpha module pin 1 9 sdo o/p to alpha module pin 12 10 sel o/p to alpha module pin 14 11 o/p 3 o/p output 3 (20ma max) 12 o/p 2 o/p output 2 (20ma max) 13 o/p 1 o/p output 1 (20ma max) 14 vss - ground (*) pull up / pull down required. qfn pin number name input / outpu t description 1 lrn btn i/p learn button input 2 lrn led o/p learn / rx led 3 mom/latc h i/p momentary / latching select 4 serial o/p o/p serial data output (low level) 5 clk o/p to alpha module pin 13 6 irq i/p to alpha module pin 2 7 sdi i/p to alpha module pin 1 8 sdo o/p to alpha module pin 12 9 sel o/p to alpha module pin 14 10 o/p 3 o/p output 3 (20ma max) 11 o/p 2 o/p output 2 (20ma max) 12 o/p 1 o/p output 1 (20ma max) 13 vss - ground 14 do not connect 15 do not connect 16 vdd - voltage in +3.3v
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 8 8 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA vcc 2.5-5.5v dc input. the power supply needs to be a s table regulated voltage with <10mv ripple gnd ground connection. op1-3 these outputs are asserted low when the relevant in puts (i/p1 ? i/p3) on the rf803e-alpha are asserted. rx led while a valid signal is present the learn/rx led ou tput will toggle at high frequency (flicker led) note that this output will be valid whether or not, the rf803e-alpha has been learnt to the rf803d-alpha or not lrn this input is used to set the decoder module to ?le arn mode? and for the ?erase function? and is also used to drive the status led. op timing this pin is read on power up to sets the action of outputs 1-3. latching is set using connection to vcc via a 250k resistor (r8). momentary is set b y connecting direct to gnd .this may need to be dropped to 10k in noisy environments. serial in normal run mode this pin outputs serial data on reception of a valid data string, this pin will output any valid serial data packet regardless of l earn status.
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 9 9 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA application circuit connecting to your alpha module:
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 0 0 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA system and functional operation pairing a transmitter to a receiver each transmitter is supplied a unique identity. eac h time a switch is pressed, the transmitter emits a highly secure rf signal with its identity e mbedded within. the receiver can learn this signal and allocate to an output. each transmitter input may be individually paired t o each individual or combination of the receiver?s outputs .this enables a powerful and fle xible remote control system! the only limitation is that each receiver has a max imum capacity of 50 pairings, these can be from the same or any number of transmitters. hint: the same transmitter may be taught to any num ber of receivers to create ?master keys?. learn mode : learn input activation is achieved by pulling thi s input to gnd briefly to learn a new transmitter switch follow this proce dure (as application circuit) any encoder input can be learnt to one or many of t he receiver outputs. each input must be learnt to each output individual ly by following this procedure: 1. select the receiver output to learn: a. briefly operate the receiver learn switch (sw1) once b. the learn led will flash once to indicate that o utput 1 is selected c. after the led stops flashing, press the learn sw itch again to select the next output channel d. repeat step c until the required output is selec ted. 2. operate whichever input on the encoder you want to learn to the selected decoder output. 3. the learn led will then illuminate, within 10sec s, operate the same encoder input again. 4. the learn led will then flash to indicate learni ng is complete. erase mode (as application circuit) : is achieved by pulling this input to gnd for >8 s econds. this causes the internal eeprom to be erased of all pre-learnt rf803e-alpha encoders. during erase the learn led will activate, it will e xtinguish when erase is complete. mom / latch this high impedance input is used to set the digita l outputs to momentary or latched actions. pull up / pull down required. lkin status digital outputs function high momentary low latching continuous transmit or state change transmit the rf803e-alpha can be set to transmit only on a s tate change ? when it will send 3 data packets each time it receives a state change on its inputs ? or to transmit continuously while an input is active. this enables the rf803e-alpha to b e used in applications with momentary inputs or latching inputs. note: trx acknowledge can only be sent after a tran smission. therefore when using trx mode and continuous transmit mode an acknowledge is send when the transmission has finished. when using trx mode and state change tran smit the acknowledgement is sent 500ms after the first packet is received by the rf8 03d-alpha.
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 1 1 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA serial data output the rf803d-alpha has a serial data output. this out puts the serial number, button and battery status of the transmitter encoder (rf803e-a lpha). this data may be fed directly to a microcontroller or rs232 type driver circuit which may then be fed directly to a pc serial port. serial data is output initially and again on every state change whilst data is being received from the rf803e-alpha transmitter. i.e. this output is v alid regardless of whether the rf803e- alpha encoder has been learnt to the rf803d-alpha decoder or not. the serial data packet contains a learn bit to show if an encoder input is learnt. serial data format serial data is sent on every state change as a stre am of 8 bytes at 19.2k baud. the serial data format is: 8 data bits with 1 stop bit, no parity. serial data is output form the decoder chip wheneve r a valid data packet from an rf80n or other compatible rf solutions transmitter is receiv ed regardless of learn output from serial data pin n n x x stat $ 0d $ 0a l f line feed (last character) cr carriage return battery status / learn status encoder input information encoder serial number 8 bytes of data transmitted n encoder serial number [nn] : made up of two 8-bit bytes where the most signif icant byte is transmitted first. this provides a total of 65,536 possible serial num bers. example: 12ab (hexadecimal) or 0001 0010 1010 101 1 (binary)
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 2 2 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA encoder input information [xx]: made up of two 8-bit bytes. the high order byte is sent first representing inpu ts 16 down to 9 where the msb is input 16 and the lsb is input 9. the low order byte is sent next representing inputs 8 down to 1 where the msb is input 8 and the lsb is input 1. a bit at state 1 represents an encoder input as act ive. using this method inputs can be multiplexed giving maximum versatility. example: 00000000 00001000 - shows input 4 active. 00000001 00000000 ? shows input 9 active 10000001 00000001 ? shows inputs 16, 9 and 1 acti ve status [stat]: the status byte is made up of an 8-bit byte as foll ows: bit description details bit-7 down to 2 reserved for future usage bit 1 learn status 1 = encoder has been learnt bit 0 not used 0 = always example: 00000010 = encoder battery ok, encoder has been learnt 00000001 = encoder battery low, encode r has not been learnt carriage return [cr] and line feed [lf] to mark the end of the serial packet ascii characte rs for carriage return (hex 0d) are sent followed by lf (hex 0a). custom versions custom versions of the rf803e-alpha / rf803d-alpha chipset are available to provide a bespoke remote chipset for oem applications. please contact our sales department for further information. *note: serial data output is common across the enti re rf80n range, therefore up to 16 inputs states are sent. when using encoders with lo wer numbers of inputs the un-used bits are set to 0. r. f. solutions ltd., unit 21, cliffe industrial estate, lewes, e sussex, bn8 6jl, england tel +44 (0)1273 898 000 fax +44 (0)1273 480 661 email sales@rfsolutions.co.uk http://www.rfsolutions.co.uk all trademarks acknowledged and remain the property of the respected owners. information contained in this document is believed to be accurate, however no representation or warran ty is given and r.f. solutions ltd. assumes no liab ility with respect to the accuracy of such information. use of r.f. solutions as critical comp onents in life support systems is not authorised ex cept with express written approval from r.f.solutio ns ltd.
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 3 3 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA technical specifications: absolute maximum ratings 803e and 803d note : stresses above those listed under ?absolute maxim um ratings? may cause permanent damage to the devic e. item rating units supply voltage 2.0 ? 5.5 v max output current 80 ma storage temperature -65 to +150 c (note) lead soldering temp c (note) esd rating v max o/p current sunk by any i/o pin 25 ma max o/p current sourced by any i/o pin 75 ma rf803e-alpha electrical characteristics min typical max unit operating current(average) vdd = 5v 603 645 689 a standby current .1 a high level input voltage 2.0 vdd v low level input voltage vss 0.8 v high level output voltage vdd - .7 v low level output voltage 0.6 v output pin current rating 25 ma led sink current 75 ma rf803d-alpha electrical characteristics min typical max unit operating current(average) vdd = 5v ma standby current a high level input voltage v low level input voltage vss 0.8 v high level output voltage vdd - .7 v low level output voltage 0.6 v output pin current rating 25 ma led sink current 75 ma
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 4 4 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA appendix ? package types 16 pin qfn package
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 5 5 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA 14 pin soic package
d d s s 8 8 0 0 3 3 - - a a l l p p h h a a - - 1 1 n n o o v v ? ? 0 0 9 9 ? ? 2 2 0 0 0 0 8 8 r r f f s s o o l l u u t t i i o o n n s s l l t t d d , , w w w w w w . . r r f f s s o o l l u u t t i i o o n n s s . . c c o o . . u u k k p p a a g g e e 1 1 6 6 t t e e l l 0 0 1 1 2 2 7 7 3 3 8 8 9 9 8 8 0 0 0 0 0 0 f f a a x x 0 0 1 1 2 2 7 7 3 3 4 4 8 8 0 0 6 6 6 6 1 1 alpha encoder / decoder ic?s RF803-ALPHA 14 pin pdip package

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