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rev. 1.00 1 april 12, 2013 rev. 1.00 pb april 12, 2013 HT6P237A/ht6p247a learning rf encoder features ? operating voltage: 2.0v ~3.6v ? average operating current: ? 20ma @ v dd =3.0v, 12dbm; ? 30ma @ v dd =3.0v, 16dbm ? standby current: 1.0a (max.) @ v dd =3v ? HT6P237A codes are fully compatible with ht6p20b ? up to 4 data pins ? providing 2 compound data trigger pins ? up to 2 24 address codes ? 8 bit time option via 2 pin selection ? integrated complete uhf transmitter ? frequency range 300mhz to 450mhz ? supports ask/ook modulation ? 3 output power levels 12dbm/14dbm/16dbm via 1 pin selection ? minimal external components ? 16-pin nsop package applications ? burglar alarm systems ? smoke and fre alarm systems ? car alarm systems ? garage door remote controllers ? home security systems ? other remote control systems general description the ht6p2x7a devices form a series of data encoders which include fully integrated ask transmitters for remote control system applications. these highly integrated devices are true switch-in, antenna-out monolithic devices. they encode 22 or 28 bits of information and then serially transmits the data out on their paout pin upon receipt of transmission enable (data pins: d0~d3 or b0~b1) signals. they encode address and data information into a coded waveform suitable for modulation and transmission using their integrated rf circuits. the devices offer high performance in two areas: power delivery and operating temperature. in terms of power, the devices are capable of delivering +16 dbm into a 50 load. this power level enables a small form factor transmitter such as a key fob transmitter to operate with a maximum distance. in terms of temperature, they can operate from -40?c to 85?c with very little frequency drift. they additionally offer exceptional ease of use and can easily pass fcc/etsi regulations. one only needs a few additional components for harmonic fltering. the devices are used with ask/ ook (amplitude shift keying/on-off keyed) uhf receiver types from wide-band super-regenerative radios to narrow-band, high performance super- heterodyne receivers to form a complete remote system.
rev. 1.00 2 april 12, 2013 HT6P237A/ht6p247a block diagram

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selection table part no. v dd addr. no. data no. compound data no. trig. frequency band rf type package HT6P237A 2.0v~3.6v 22 2 2 data low 300mhz~450mhz ask tx 16nsop ht6p247a 2.0v~3.6v 24 4 2 data low 300mhz~450mhz ask tx 16nsop
rev. 1.00 3 april 12, 2013 HT6P237A/ht6p247a pin description pin no. pin name i/o internal connection description 1~2 b1~b0 i cmos in compound pin C d0~d3 for b0 and d1~d2 for b1 in ht6p247a compound pin C d0~d1 for b0 in HT6P237A 3~4 bts1~bts0 i cmos in bit time select pins set to v dd , foating or ground to select 8 bit width types 5 ops i cmos in output power select pin. set to v dd , foating or ground to select one of 3 power output levels v dd : 16dbm, floating: 14dbm, gnd: 12dbm 6 vdd p positive power supply 7/15 vss p negative power supply, ground pin 15 in the HT6P237A should be grounded 8 paout o power amplify output l/c matching circuit 9 pvss p rf negative power supply, ground 10 xin i oscillator 13.56mhz crystal oscillator input for 433.92mhz rf 11 xout o oscillator 13.56mhz crystal oscillator output for 433.92mhz rf 12 dout o cmos out encoder data out 13~16 d0~d3 i cmos in data input and transmission enable; active low 16 btsgs (HT6P237A only) i cmos in bit time group select 0: bit time group 1 1: bit time group 2 this pin must be either high or low and not allowed to foat approximate internal connections

rev. 1.00 4 april 12, 2013 HT6P237A/ht6p247a absolute maximum ratings logic supply voltage ................ v ss -0.3v to v ss +3.6v logic input voltage .................. v ss -0.3v to v dd +0.3v logic output voltage ............... v ss -0.3v to v dd +0.3v storage temperature ............................ -55?c to 150?c operating temperature .......................... -40?c to 85?c note: these are stress ratings only. stresses exceeding the range specifed under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. d.c. characteristics ta=25c symbol parameter test condition min. typ. max. unit v dd condition v dd logic supply voltage 2.0 3 3.6 v i sb stand-by current 3 no load. input pins foating 1.0 a v ih h input voltage 0.8v dd v v il l input voltage 0.2v dd v r pl pull-high resistance 3 d0~d3 , b0~b1 500 k i oh hi-level output current 3 v oh =0.9v dd ; d out 7 ma i ol low-level output current 3 v ol =0.1v dd ; d out 2 ma r.f. characteristics specifcations apply for v dd =3.0v, t a =25c, freq 433mhz unless otherwise noted. rl 50 load (matched) p parameter test conditions min typ max units v dd conditions i 1 average data current* (data is 50% duty cycle) 3v @ 433mhz, pout=+16dbm 21 ma @ 433mhz, pout=+12dbm 12 i 0 data low current 3v 5 ma rf and crystal output power level 3v ops 0 12 dbm floating 14 1 16 extinction ratio for ask 10kbps 3v 76 dbc output blanking 3v stdby transition from low to high 1800 s ask to rf out response time 3v delta between ask input transition from low to high to rf output transition from low to high 1 s harmonic output for 433.92 mhz 3v @867.84mhz, 2nd harm -50 dbc @1301.76mhz, 3rd harm -51 occupied bandwidth 3v @433.92mhz <1000 khz 433.92 mhz single side band phase noise 3v @100khz from carrier -70 dbc/hz -75 @1000khz from carrier xtlin, xtlout 3v pin capacitance 15 pf note: it is recommended that vdd power on stability time should be less than 500s to allow the device to operate normally.
rev. 1.00 5 april 12, 2013 HT6P237A/ht6p247a functional description the devices encode both address and data information into an encoded waveform and output it on dout. this waveform is fed to the rf modulator for transmission purposes. normal operation the devices encode and transmits the address/data information to a decoder upon receipt of a trigger signal. the transmission function of the series are enabled by the data inputs, which are the active low pins d0~d3 and b0~b1. the following diagram shows the transmission timing of these devices. d0~d3, b0, b1 1ms (typ.) dout pilot code address/data/end code the transmission sequence is pilot, address, data, end code. d0~d3, b0, b1 < 1 pilot code > 1 code word 1 code word 1pilot codeHT6P237A. 2. the bts0 and bts1 pins can be set either high, low or foating. 3. the bts0 and bts1 pins should never be both high as this may cause erroneous operation. 4. if there is an overlap bit time range then select the closest typical bit time. for example if the desired bit time is 1.46ms, choosing the 1.5ms setting is best. 5. for other frequencies, the bit time will be the ratio of 433.92/freq. for example, for a frequency of 315mhz, the bit time 1.1ms will be 1.1433.92/315=1.51ms.
rev. 1.00 6 april 12, 2013 HT6P237A/ht6p247a synchronous bit waveform the synchronous bit waveform is 8-bits long and exhibits a low pulse for 23 followed by a high pulse for 1 as shown in the following below: pilot code 23 1 code word a group of code bits is called a code word. a code word consists of a pilot-code (synchronous bit) followed by the address/data bits and end-code as shown in the following diagram. ? HT6P237A pilot-code a0 ~ a 21 d 1~ d 0 0101 ? ht6p247a pilot-code a0 ~ a 23 d 3~ d 0 0101 operation flowchart power on no yes yes stand-by mode data input pin in low state data input pin still in low state no 1 word of pilot/address/data/end transmitted application circuit
rev. 1.00 7 april 12, 2013 HT6P237A/ht6p247a
rev. 1.00 8 april 12, 2013 HT6P237A/ht6p247a package information note that the package information provided here is for consultation purposes only. as this information may be updated at regular intervals users are reminded to consult the holtek website for the latest version of the package information. additional supplementary information with regard to packaging is listed below. click on the relevant section to be transferred to the relevant website page. ? further package information (include outline dimensions, product tape and reel specifcations) ? packing meterials information ? carton information ? pb free products ? green packages products
rev. 1.00 9 april 12, 2013 HT6P237A/ht6p247a 16-pin nsop (150mil) outline dimensions ms-012 symbol dimensions in inch min. nom. max. a 0.228 D 0.244 b 0.150 D 0.157 c 0.012 D 0.020 c ? 0.386 D 0.402 d D D 0.069 e D 0.050 D f 0.004 D 0.010 g 0.016 D 0.050 h 0.007 D 0.010 0 D 8 symbol dimensions in mm min. nom. max. a 5.79 D 6.20 b 3.81 D 3.99 c 0.30 D 0.51 c ? 9.80 D 10.21 d D D 1.75 e D 1.27 D f 0.10 D 0.25 g 0.41 D 1.27 h 0.18 D 0.25 0 D 8
rev. 1.00 10 april 12, 2013 HT6P237A/ht6p247a copyright ? 2013 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek assumes no responsibility arising from the use of the specifcations described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek's products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notifcation. for the most up-to-date information, please visit our web site at http://www.holtek.com.

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