U3742BM ASK/FSK 433.92/315 MHz Receiver

The U3742BM is a single-chip PLL receiver developed to meet the requirements of low data rate, low-cost RF data transmission systems. The U3742BM is used in conjunction with the PLL RF transmitter U2741B for applications in telemetry, security technology, and keyless entry systems. 

The main technical features are as follows: 

Data transmission rate is 1 to 10 Kb/s; 

The encoding method is Manchester or bi-phase; 

Operating frequency is 300-450 MHz; 

ASK/FSK modulation/demodulation mode; 

Sensitivity is -ll2 dBm; 

The power supply voltage is 4.5 to 5.5 V. 

· Operating current is 7.0～8.6 mA, sleep mode current is 190～276μA; 

· Complies with the US military standard MIL-STD883 ESD protection (4KV HBM); 

Single-ended RF input, easy to adapt to λ/4 antenna or printed antenna on PCB board; 

· Programmable output interface to meet sensitivity selection and peripheral control; 

Communication with the microcontroller μC is achieved through a bidirectional data line; 

Power management can be achieved using a microcontroller μC; 

· Operating temperature: -40～85℃.

U3742BM UHF ASK/FSK remote control receiver circuit block diagram