The MAX7042 is a fully integrated, low-power, CMOS superheterodyne RF receiver from Texas Instruments. It is designed to receive frequency-shift-keyed (FSK) data at rates up to 66kbps nonreturn-to-zero (NRZ) (33kbps Manchester). The MAX7042 requires only a few external components to realize a complete wireless RF receiver at 308, 315, 418, and 433.92MHz. The MAX7042 includes all the active components required in a superheterodyne receiver including a low-noise amplifier (LNA), an image-rejection (IR) mixer, a fully integrated phase-locked loop (PLL), local oscillator (LO), 10.7MHz IF limiting amplifier with received-signal-strength indicator (RSSI), low-noise FM demodulator, and a 3V regulator. Differential peak-detecting data demodulators are included for baseband data recovery. The MAX7042 is available in a 32-pin TQFN and is specified over the automotive -40°C to +125°C temperature range.
The MAX7042 is a fully integrated, low‑power CMOS superheterodyne RF receiver that supports frequency‑shift‑keyed (FSK) data up to 66 kbps. It includes a low‑noise amplifier, image‑rejection mixer, PLL, local oscillator, IF limiting amplifier with RSSI, FM demodulator, and on‑chip regulator, all in a 32‑pin TQFN package.
The device operates over an automotive temperature range of –40 °C to +125 °C and can be powered from either a 2.4 V–3.6 V or a 4.5 V–5.5 V supply. Four carrier frequencies (308 MHz, 315 MHz, 418 MHz, 433.92 MHz) are selectable via two frequency‑select pins, and the receiver offers high sensitivity and low shutdown current for power‑critical applications.
| Operating Temperature Range | -40 °C to +125 °C |
|---|---|
| Carrier Frequencies | 308 MHz, 315 MHz, 418 MHz, 433.92 MHz |
| Package | 32‑Pin TQFN |
Four carrier frequencies are selectable: 308 MHz, 315 MHz, 418 MHz, and 433.92 MHz.
The device is specified for operation from –40 °C up to +125 °C.