HT6P235A/HT6P245A Learning RF Encoder without Crystal Features General Description • Operating voltage: 2.5V~3.6V The devices are a series of encoders which include a fully integrated 433MHz ASK transmitter for remote control system applications. They form a highly functionally integrated device series which can be described as true “switch-in, antenna-out” monolithic devices. The devices encode 24 or 28 bits of address and data information and then serially transmits it via their DOUT pin upon receipt of a transmission enable signal which is provided by data pins, D0~D3 or B0~B1. The devices also encode the address and data information into a coded waveform which is transmitted out on their PAOUT pin for RF modulation. Two areas stand out for special attention, those of power delivery and operating temperature. In terms of power, the HT6P2x5A is capable of delivering +16dBm into a 50Ω load, a power level which enables a small form factor transmitter, such as a key fob transmitter, to operate over a long distance. In terms of temperature, the HT6P2x5A can operate from -10˚C to 50˚C with very little frequency drift. Additionally the devices are extremely easy to use and having a fully integrated oscillator require only a minimum of external components to implement a complete and versatile transmitter. For longer distance remote control, the devices operate together with an ASK/OOK – Amplitude Shift Keying/On-Off Keyed – UHF wide-band super-regenerative receiver. • Average operating current ♦♦ ♦♦ 20mA @ VDD=3.0V, 12dBm 30mA @ VDD=3.0V, 16dBm • Standby current: 1.0μA (Max.) @ VDD=3V • Up to 4 data pins • 2 compound data trigger pins • Up to 224 address codes • Integrated 13.56MHz RC oscillator • 8 bit time using 2 pin selection • Integrated UHF transmitter • Frequency: 433MHz • Supports ASK/OOK modulation • 3 output power levels: 12dBm/14dBm/16dBm using a single pin selection • Minimal external components • High noise immunity • 16-Pin NSOP package Applications • Burglar alarm systems • Smoke and fire alarm systems • Personal alarm systems • Car/garage door controllers • Home/office/car security systems • Other remote control systems Selection Table Addr. No. Data No. Compound Data No. Trig. Frequency Band RF Type Package HT6P235A 2.5V~3.6V 22 2 1 Data Low 433MHz ASK TX 16 NSOP HT6P245A 2.5V~3.6V 24 4 2 Data Low 433MHz ASK TX 16 NSOP Part No. Rev. 1.00 VDD 1 June 07, 2013 HT6P235A/HT6P245A Block Diagram Pin Assignment Rev. 1.00 2 June 07, 2013 HT6P235A/HT6P245A Pin Description Pin No. Pin Name I/O Internal Connection Description 1~2 B1~B0 I CMOS IN Compound pins. B0 is for D0 and D3 while B1 is for D1 and D2 in the HT6P245A/devices B0 is for D0 and D1 in the HT6P235A 3~4 BTS1~BTS0 I CMOS IN Bit Time Select Pins. Externally set to VDD, Ground or floating to provide eight bit width selections as shown in the functional description section. 5 OPS I CMOS IN Output Power Select pin. Externally set to VDD, Ground or floating to provide three power output selections VDD: 16dBm, Floating: 14dBm, GND: 12dBm 6 VDD P — Positive power supply 7 VSS P — Negative power supply, ground 8 PAOUT Power Amplifier O It should be combine with external matching circuit Output 9 PVSS P 10 NC — — 11 CREF O CMOS OUT For Test Mode only 12 DOUT O CMOS OUT Data output pin 13~16 D0~D3 I CMOS IN Data input and transmission enable active low. Pin 15 should be connected to ground in HT6P235A CMOS IN Bit time group select, 0: Bit time group 1 1: Bit time group 2 as shown in the functional description section. This pin must be tied either high or low and not be allowed to float 16 BTSGS HT6P235A only I — RF negative power supply, ground — Approximate Internal Connections Rev. 1.00 3 June 07, 2013 HT6P235A/HT6P245A Absolute Maximum Ratings Logic Supply Voltage ..………VSS-0.3V to VSS+3.6V Storage Temperature ....………………-55˚C to 150˚C Operating Temperature...………………-10˚C to 50˚C Logic Input Voltage ………….VSS-0.3V to VDD+0.3V Logic Output Voltage …………VSS-0.3V to VDD+0.3V 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 Parameter Ta=25°C Test condition VDD Condition — Min. Typ. Max. Unit 2.5 3.0 3.6 V — — 1.0 μA VDD Logic Supply Voltage — ISB Stand-by current 3 VIH “H” Input Voltage — — 0.8VDD — — V VIL “L” Input Voltage — — — — 0.2VDD V RPL Pull-high Resistance 3 D0~D3, B0~B1 — 500 — kΩ IOH Hi-level output current 3 VOH=0.9VDD; DOUT — -7 — mA IOL Low-level output current 3 VOL=0.1VDD; DOUT — 2 — mA No load. Input pins floating R.F. Characteristics Specifications apply for Ta=25°C, Freq 433MHz unless otherwise noted. RL 50Ω load (matched) Symbol Parameter Test Conditions VDD I1 Average Data Current* 50% duty cycle data 3V I0 Data LOW current 3V Min. Conditions @ 433MHz, POUT=+16dBm @ 433MHz, POUT=+12dBm — — Typ. 25 15 Max. Units — mA mA — 6 — 0 — 12 — Floating — 14 — 1 — 16 — RF and Crystal — fHIRC Output power level 3V OPS — -0.5% 13.56 +0.5% dBm 13.56MHz Internal RC Oscillator 3V MHz — Extinction ratio for ASK 10Kbps 3V — — 70 — dBc — Output Blanking 3V STDBY transition from Low to High — 500 — μs — 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 — μs Note: It is recommended that the VDD power on rise time should be less than 500us to allow the device to power up normally and start normal operation. Rev. 1.00 4 June 07, 2013 HT6P235A/HT6P245A Functional Description 1.1 Code bits 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. The HT6P2x5A encodes the address code and data set into a special waveform and output it to the DOUT. This waveform is fed to the RF modulator for transmission. 1.2 Address/Data bit waveform Normal Operation An address/data bit can be designated as either bit ”0” or “1” if it is in a high or low state respectively. A single bit waveform consists of three pulse cycles, as shown the diagram. The HT6P2x5A series encodes and transmits address/data to a decoder upon receipt of a trigger signal. The transmission function of the HT6P2x5A series are enabled by the data inputs, D0~D3 with the – B0~B1 pins using active low conditions. 1λ 2λ Bit “0” D0~D3, B0 t DW 1ms (typ.) 1λ 2λ Bit “1” DOUT Address/Data bit Pilot code Address/Data/End code Note: 1. Bit “0” consists of a “low” pulse for 1λ then changes to a “high” pulse for 2λ. The transmission sequence is Pilot, Address, Data, End code. 2. Bit “1” consists of a “low” pulse for 2λ then changes to a “high” pulse for 1λ. D0~D3, B0 < 1 pilot code 1pilot code < Active < 1 code word 1.3 Single-Bit Data Width > 1 code word There are 8 different single-bit data widths as shown in the table, selected using the BTS1 and BTS0 control pins. DOUT 1 code word Transmission Timing Diagram Symbol tDW Parameter Single bit data width Pin Condition BTS1/BTS0 Group1 Group2 0/0 1.1 0.7 0/Floating 1.2 0.8 0/1 1.3 0.9 Floating/0 1.4 1.0 Floating/ Floating 1.5 2.0 Floating/1 1.6 2.1 1/0 1.76 2.2 1/ Floating 1.9 2.3 1/1 NC NC Unit ms — Note: 1. Group2 is only available for HT6P235A. 2. The BTS0 and BTS1 pins can be set to either “1”, “0” or “ Floating”. 3. The BTS0 and BTS1 pins must not both be “1”, this can result in erroneous operation. 4. If an overlapping bit time situation exists then choose the nearest time bit value. For example if the desired bit time is 1.46ms, then a choice of 1.5ms is preferred. Rev. 1.00 5 June 07, 2013 HT6P235A/HT6P245A 1.4 Synchronous Bit Waveform 1.6 Operation Flowchart For the HT6P2x5A device, a synchronous bit waveform is 8-bits long. It exhibits a low pulse for 23λ followed by a high pulse for 1λ as shown in the diagam. Power ON 1λ Stand-By Mode Pilot code 23λ 1.5 Code Word No A group of code bits is called a code word. A code word consists of one Pilot-code or synchronous bit followed by the address/data bits and the end-code. Yes 1 word of pilot/address/data/end transmitted • HT6P235A Pilot-code A0~A21 D1~D0 “0101” A0~A23 D3~D0 “0101” Data input Pin in Low State • HT6P245A Pilot-code Rev. 1.00 No 6 Data input Pin still in Low State Yes June 07, 2013 HT6P235A/HT6P245A Application Circuits HT6P245A HT6P235A Rev. 1.00 7 June 07, 2013 HT6P235A/HT6P245A 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 • PB FREE Products • Green Packages Products Rev. 1.00 8 June 07, 2013 HT6P235A/HT6P245A 16-pin NSOP (150mil) Outline Dimensions MS-012 Symbol Nom. Max. A 0.228 ― 0.244 B 0.150 ― 0.157 C 0.012 ― 0.020 C׳ 0.386 ― 0.402 D ― ― 0.069 E ― 0.050 ― F 0.004 ― 0.010 G 0.016 ― 0.050 H 0.007 ― 0.010 α 0° ― 8° Symbol Rev. 1.00 Dimensions in inch Min. Dimensions in mm Min. Nom. Max. A 5.79 ― 6.20 3.99 B 3.81 ― C C׳ 0.30 ― 0.51 9.80 ― 10.21 D ― ― 1.75 E ― 1.27 ― F 0.10 ― 0.25 G 0.41 ― 1.27 H 0.18 ― 0.25 α 0° ― 8° 9 June 07, 2013 HT6P235A/HT6P245A 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 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. 1.00 10 June 07, 2013