MAX7042 308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver

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The MAX7042 fully integrated, low-power, CMOS superheterodyne RF receiver 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 thin QFN and is specified over the automotive -40°C to +125°C temperature range.

Key Features

Applications/Uses

+2.4V to +3.6V or +4.5V to +5.5V Single-Supply Operation
Four User-Selectable Carrier Frequencies 308, 315, 418, and 433.92MHz
-110dBm RF Input Sensitivity at 315MHz
-109dBm RF Input Sensitivity at 433.92MHz
Fast Startup (< 250µs)
Small 32-Pin Thin QFN Package
Low Operating Supply Current
- 6.2mA Continuous
- 20nA Power-Down
Integrated PLL, VCO, and Loop Filter
45dB Integrated Image Rejection
Selectable IF BW with External Filter
Positive and Negative Peak Detectors
RSSI Output

	Home and Office Lighting Control
	Home Automation
	Local Telemetry Systems
	Remote Keyless Entry (RKE)
	Remote Sensing
	Security Systems
	Smoke Alarms
	Tire-Pressure Monitoring (TPM)

Key Specifications: Receive System ICs

Part Number

Ref. Clock Freq (MHz)

IF Output Freq. (MHz)

Supply Voltage (V)

Supply Current (mA)

Applications

Min. Frequency (MHz)

Max. Frequency (MHz)

Solutions

Features

Industry Qualified

Footprint (mm x mm)

Package

Smallest Available Package (max w/pins) (mm²)

RoHS Available

Price^**

MAX7042

<=17.634

10.7

2.4 to 3.6
4.5 to 5.5

6.2

•

ISM

•

RKE

•

TPM

300

450

Selectable 308/315/418/433.92MHz

•	-110dBm FSK sensitivity

•	-40C to +125C operation

•	6.2mA receive current

•	>45dB Image Rejection

•	On-Chip PLL, VCO and Loop Filter

•	Operates down to 2.4V

•	Operates from Single 3.3V or 5.0V Supplies

Automotive - AECQ100
Automotive - General

5.0 x 5.0

THIN QFN/32

Yes

$2.10 @ 1k

See All Receive System ICs (15)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.