HT6P237A/HT6P247A Learning RF Encoder Features General Description • Operating voltage: 2.0V ~3.6V 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 50Ω 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 filtering. 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 superheterodyne receivers to form a complete remote system. • Average Operating Current: ♦♦ ♦♦ 20mA @ VDD=3.0V, 12dBm; 30mA @ VDD=3.0V, 16dBm • Standby current: 1.0μA (Max.) @ VDD=3V • HT6P237A codes are fully compatible with HT6P20B • Up to 4 data pins • Providing 2 compound data trigger pins • Up to 224 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 fire alarm systems • Car alarm systems • Garage door remote controllers • Home Security systems • Other remote control systems Block Diagram Rev. 1.10 1 November 10, 2014 HT6P237A/HT6P247A Pin Assignment Selection Table Part No. VDD 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 Pin Description Pin No. Pin Name I/O Internal Connection Description 1~2 B1~B0 I CMOS IN Compound pin – D0~D3 for B0 and D1~D2 for B1 in HT6P247A Compound pin – D0~D1 for B0 in HT6P237A 3~4 BTS1~BTS0 I CMOS IN Bit Time Select Pins Set to VDD, floating or ground to select 8 bit width types 5 OPS I CMOS IN Output Power Select Pin. Set to VDD, floating or ground to select one of 3 power output levels VDD: 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 9 PVSS P — 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 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 float Power Amplify L/C matching circuit Output RF negative power supply, ground Encoder data out Approximate Internal Connections Rev. 1.10 2 November 10, 2014 HT6P237A/HT6P247A Absolute Maximum Ratings Logic Supply Voltage................. VSS-0.3V to VSS+3.6V Operating Temperature........................... -40˚C to 85˚C Logic Input Voltage................... VSS-0.3V to VDD+0.3V Logic Output Voltage................ VSS-0.3V to VDD+0.3V ESD HBM........................................................ > ±5KV ESD MM......................................................... > ±400V Storage Temperature............................. -55˚C to 150˚C Note: These are stress ratings only. Stresses exceeding the range specified 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 Symbol Ta=25°C Test condition Parameter VDD condition — Min. VDD Logic Supply Voltage — ISB Stand-by current 3V No load. Input pins floating VIH “H” Input Voltage — VIL “L” Input Voltage — Typ. Max. Unit 2.0 3 3.6 V — — 1.0 μA — 0.8VDD — — V — — — 0.2VDD V RPL Pull-high Resistance 3V D0~D3, B0~B1 — 500 — kΩ IOH Hi-level output current 3V VOH=0.9VDD; DOUT — -7 — mA IOL Low-level output current 3V VOL=0.1VDD; DOUT — 2 — mA R.F. Characteristics Specifications apply for VDD=3.0V, TA=25°C, Freq 433MHz unless otherwise noted. RL 50Ω load (matched) P Parameter Test Conditions I1 Average Data Current* (Data is 50% duty cycle) 3V I0 Data LOW current 3V Min Conditions VDD @ 433MHz, POUT=+16dBm — @ 433MHz, POUT=+12dBm — Typ 21 12 Max Units — mA mA — 5 — RF and Crystal Output power level 3V OPS 0 — 12 — Floating — 14 — 1 — 16 — — 76 — dBc dBm Extinction ratio for ASK 10Kbps 3V Output Blanking 3V STDBY transition from Low to High — 1800 — μs ASK to RF Out Response Time Delta between ASK Input Transition from Low to 3V High to RF Output Transition from Low to High — 1 — μs Harmonic output for 433.92 MHz 3V — dBc Occupied Bandwidth 3V @433.92MHz — kHz — dBc/Hz — pF — @867.84MHz, 2nd harm @1301.76MHz, 3rd harm — @100kHz from Carrier 433.92 MHz Single Side Band Phase Noise 3V XTLIN, XTLOUT 3V Pin capacitance — @1000kHz from Carrier — — -50 -51 <1000 -70 -75 15 Note: It is recommended that VDD power on stability time should be less than 500μs to allow the device to operate normally. Rev. 1.10 3 November 10, 2014 HT6P237A/HT6P247A Functional Description Code bits 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. A code bit is the basic component of the encoded waveform, and can be classified as either an address/data bit or a pilot-code which is a synchronous bit. Address/Data bit waveform Normal Operation An address/data bit can be designated as either a ”0” or “1” bit depending upon its waveform type. A one bit waveform consists of one pulse cycle, as shown in the following diagram. 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. 1λ 2λ Bit “0” t DW D0~D3, B0, B1 1λ 1ms (typ.) 2λ Bit “1” DOUT Address/Data bit Pilot Address/Data/End code code Note: 1. A “0” consists of a “low” pulse for 1λ then a “high” pulse for 2λ. The transmission sequence is Pilot, Address, Data, End code. 2. A “1” consists of a “low” pulse for 2λ then a “high” pulse for 1λ. D0~D3, B0, B1 < 1 pilot code 1pilot code<Active<1 code word One-Bit Data Width > 1 code word There are 8 different one-bit data widths as shown in the following table. They are selected by the control pins BTS1 and BTS0. In the table “F” refers to a floating input level. DOUT 1 code word Transmission Timing Diagram Symbol tDW Parameter One bit data width (tDW) @433.92MHz Pin condition BTS1/BTS0 Group 1 Group2 0/0 1.1 0.4 0/F 1.2 0.5 0/1 1.3 0.6 F/0 1.4 0.7 F/F 1.5 0.8 F/1 1.6 0.9 2.0 1/0 1.76 1/ F 1.9 2.1 1/1 NC NC Unit ms — Note: 1. Group2 is only available for the HT6P237A. 2. The BTS0 and BTS1 pins can be set either high, low or floating. 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 1.1×433.92/315=1.51ms. Rev. 1.10 4 November 10, 2014 HT6P237A/HT6P247A Synchronous bit Waveform word consists of a Pilot-code (Synchronous bit) followed by the address/data bits and end-code as shown in the following diagram. The synchronous bit waveform is 8-bits long and exhibits a low pulse for 23λ followed by a high pulse for 1λ as shown in the following below: • HT6P237A Pilot-code 1λ Pilot code A0~A21 D1~D0 “0101” A0~A23 D3~D0 “0101” • HT6P247A 23λ Pilot-code Code Word A group of code bits is called a code word. A code Operation Flowchart Power ON Stand-By Mode No Data input Pin in Low State Yes 1 word of pilot/address/data/end transmitted No Rev. 1.10 Data input Pin still in Low State 5 Yes November 10, 2014 HT6P237A/HT6P247A Application Circuit Rev. 1.10 6 November 10, 2014 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 Specifications) • Packing Meterials Information • Carton information Rev. 1.10 7 November 10, 2014 HT6P237A/HT6P247A 16-pin NSOP (150mil) Outline Dimensions Symbol Dimensions in inch Min. Nom. Max. — A — 0.236 BSC B — 0.154 BSC — C 0.012 — 0.020 C' — 0.390 BSC — 0.069 D — — E — 0.050 BSC — F 0.004 — 0.010 G 0.016 — 0.050 H 0.004 — 0.010 α 0° ― 8° Symbol Rev. 1.10 Dimensions in mm Min. Nom. Max. A — 6.000 BSC — B — 3.900 BSC — 0.51 C 0.31 — C' — 9.900 BSC — D — — 1.75 E — 1.270 BSC — F 0.10 — 0.25 G 0.40 — 1.27 H 0.10 — 0.25 α 0° ― 8° 8 November 10, 2014 HT6P237A/HT6P247A Copyright© 2014 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 specifications 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 notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.10 9 November 10, 2014