The MC13111AFTAR2 from NXP Semiconductors (formerly Freescale) is a low-power, single-chip transmitter designed for remote keyless entry (RKE) and other short-range wireless applications operating in the 300-450 MHz frequency range. It is highly integrated to minimize external components and simplify system design, making it suitable for cost-sensitive and size-constrained applications.

Applications

• Remote Keyless Entry (RKE): Primarily used in car key fobs for locking, unlocking, and starting vehicles remotely.
• Remote Control Systems: Employed in various remote control applications for garage door openers, security systems, and industrial equipment.
• Tire Pressure Monitoring Systems (TPMS): Can be integrated into TPMS sensors to transmit tire pressure and temperature data wirelessly.
• Alarm Systems: Used in wireless alarm systems for homes and businesses to transmit alarm signals to a central monitoring station.
• General Purpose RF Transmitters: Suitable for any application requiring short-range, low-power wireless data transmission in the 300-450 MHz band.

Features

• Frequency Range: Operates in the 300-450 MHz frequency band, supporting multiple frequencies within this range.
• Low Power Consumption: Designed for ultra-low power operation to maximize battery life in portable devices.
• FSK/ASK Modulation: Supports both Frequency-Shift Keying (FSK) and Amplitude-Shift Keying (ASK) modulation schemes for flexible data transmission.
• On-Chip PLL: Integrated Phase-Locked Loop (PLL) for stable and accurate frequency generation.
• Programmable Output Power: Adjustable output power allows optimizing range and minimizing power consumption.
• Low External Component Count: Highly integrated design minimizes the need for external components, reducing cost and board space.
• Wake-up Timer: Built-in wake-up timer enables periodic operation to conserve power.
• Data Rate Flexibility: Supports various data rates to accommodate different application requirements.

Benefits

• Extended Battery Life: Low power consumption results in longer operational time for battery-powered devices.
• Cost-Effective Solution: Highly integrated design reduces the bill of materials (BOM) cost, making it an economical choice.
• Simplified System Design: Minimal external components simplify the design process and reduce development time.
• Reliable Communication: Robust modulation schemes and stable frequency generation ensure reliable data transmission.
• Flexible Modulation Options: Supports both FSK and ASK modulation, allowing selection of the most suitable scheme for the application.
• Compact Size: Small package size enables integration into space-constrained applications.

Additional Details

The MC13111AFTAR2 operates on a supply voltage typically between 2.0V and 3.6V. It offers programmable output power, typically up to +10 dBm. The modulation type (FSK or ASK) can be selected via configuration pins. The device features a wake-up timer for periodic operation and supports various data rates. It typically comes in a small TSSOP package. It is designed for unidirectional communication, i.e., transmitting data but not receiving.