U4311B-FS
Description
The U4311B-FS is a monolithic integrated circuit in bipolar technology for low-current UHF remote control super-heterodyne receivers in amplitude- or frequencymodulated mode. Typical applications are keyless car lock-, alarm- or tele-control remote indication systems. Especially for automotive applications, it supports a superhet design with about 1 m A total current consumption as required by the car manufacturers.
Features
D Usable for amplitude- and frequency-modulated transmission systems D Extremely low quiescent current (approximately 1 m A in standby mode due to wake-up concept) D Wide power supply voltage range 3 to 13 V D Sensitive IF amplifier for 10.7-MHz operating frequency D Logarithmic AM demodulator D FM demodulator D Monoflop output to wake up a microcontroller D High-performance operational amplifier to realize a data recovering filter D Non-inverting clamping parator with amplitudedepending hysteresis for data regeneration
Block Diagram
Wake-up out
VS 19...
