CMT2251A CMT2251A 300 480 MHz OOK Receiver with Decoder and 1 PWM Output Features Applications Embedded EEPROM Smart LED Control (PWM) Very Easy Development with RFPDK Low-Cost Consumer Electronics Applications All Features Programmable Remote Control Frequency Range: 300 to 480 MHz Fan Controller Symbol Rate: 0.1 to 40 ksps Wireless Controller with PWM Interface Sensitivity: -114 dBm at 1 ksps, 0.1% BER Home Security and Alarm 3-wire SPI Interface for EEPROM Programming Garage and Gate Openers Stand-Alone, No External MCU Control Required Home and Building Automation Configurable Duty-Cycle Receive Mode Industrial Monitoring and Controls 1 PWM Control Output Sensor Networks Low Power Consumption: 3.8 mA Low Standby Current 520 uA Ordering Information Support 1920 and 1527 Decoding Formats ID Study, Factory Code Supported Part Number Frequency Package MOQ RoHS Compliant CMT2251A-EQR 433.92 MHz QFN16 5,000 pcs 16-pin QFN 3x3 Package Descriptions The CMT2251A is a true single-chip, ultra low power and high performance device that consists of an OOK RF receiver, a data decoder and 1 PWM output pin for various 300 to 480 MHz wireless applications. The device integrates a data decoder that is not only compatible with the most common used packet format of 1527, but also a more efficient, flexible and powerful format of 1920 des igned by CMOSTEK. The device delivers sensitivity up QFN16 (3X3) to -114 dBm while consuming only 3.8 mA current when it is always on. An embedded EEPROM allows the frequency, symbol rate and other features to be programmed into the device using the CMOSTEK USB Programmer and the RFPDK. Alternatively, in stock products of 433.92 MHz are 12 11 10 9 available for immediate demands with no need of EEPROM 8 pr ogramming. When pairing the device to CMOSTEK GND 13 XIN transmitter, the synchronization ID can be programmed into RFIN 7 XOUT 14 both of the transmitter and receiver during the GND 15 6 NC manufacturing phase, or studied by the receiver from the 5 VDD 16 PWM/TEST transmitter remotely by end customers. The CMT2251A is TM 1 2 3 4 part of the CMOSTEK NextGenRF family, together with CMT215x transmitters, they enable ultra low cost, low power consumption RF links. CMT2251A Top View Rev 1.1 Page 1 / 3 Copyright By CMOSTEK www.cmostek.com CSB VCON SDA VCOP SCL NC NC NC CMT2251A Typical Application L2 VDD ANT C2 X 1 13 8 J1 GND XIN VDD D1 C1 C3 LED1 14 7 1 RFIN XOUT U1 CSB 2 L3 L1 SDA 3 15 6 CMT2251A GND NC SCL 4 VDD 5 R1 16 5 Q1 VDD PWM/TEST C0 Note: Connector J1 is for EEPROM Programming. Figure 1. CMT2251A Typical Application Schematic Table 1. BOM of Typical Application Value(Match to 50 AN T ) Value(Common Used ANT) Designator Descriptions Unit Manufacturer 315 MHz 433.92 MHz 315 MHz 433.92 MHz CMT2251A, 300 480 MHz OOK U1 receiver with decoder and 1 PWM - - - CMOSTEK output X1 20 ppm, SMD32*25 mm, crystal 26 26 MHz EPSON L1 5%, 0603 multi-layer chip inductor 33 27 68 33 nH Murata LQG18 L2 5%, 0603 multi-layer chip inductor 33 22 33 22 nH Murata LQG18 C1 0.25 pF, 0402 NP0, 50 V 5.6 3.3 4.3 2.7 pF Murata GRM15 C0 20%, 0402 X7R, 25 V 0.1 0.1 uF Murata GRM15 C2, C3 5%, 0402 NP0, 50 V 27 27 pF Murata GRM15 LED1 SMD 5050, orange LED 0.25 0.25 W R1 5%, 0402 chip resistor 1.0 1.0 k D1 MBR0520, SOD123 Schottky diode 0.5 0.5 A L3 SMD =6mm, power inductor 68 68 uH SOT23, SI2312 20-V N-channel Q1 - - Vishay MOSFET Table 2. CMT2251A Pin Descriptions Pin Number Name I/O Descriptions 1 CSB I 3-wire SPI chip select input for EEPROM programming 2 SDA IO 3-wire SPI data input and output for EEPROM programming 3 SCL I 3-wire SPI clock input for EEPROM programming 4, 6, 9, 10 NC - Not connected, leave floating PWM control output 5 PWM/TEST O Receiving data output for production test purpose 7 XOUT O Crystal oscillator output 8 XIN I Crystal oscillator input or external reference clock input Rev 1.1 Page 2 / 3 www.cmostek.com 1 12 CSB CSB VCON 2 11 SDA SDA VCOP 3 10 SCL SCL NC 4 9 NC NC