TI 公司的SN761633 是单片FM立体声收音机接收器和发送器，频率范围从76 MHz 到108 MHz，广泛用于手提媒体播放器 （PMP），MP3 播放器和个人导航设备。
本文介绍了SN761633的主要性能，功能方框图以及应用电路图。
The SN761633 is an FM radio receiver and transmitter IC for portable audio players.The circuit consists of a stereo FM radio receiver and FM transmitter, and is available in a small-outline package.
主要特性：
·Single-Chip FM Stereo Radio and Transmitter
·FM Stereo MPX [Receive (Rx), Transmit (Tx)]
·Frequency Range 76 MHz to 108 MHz (Rx, Tx)
·Low Supply Current
·Rx: 11.5 mA (VCC = 3 V, No RF Input)
·Tx: 13 mA (VCC = 3 V, No Audio Input,
·RTX = Open)
·32.768-kHz Crystal
·I2C Interface
·MPX Output for RDS (Rx)
·Seek Tuning (Rx)
·RFAGC (Rx)
·RF Auto-Power Control (Tx)
·Pilot Cancel (Rx)
·Sixth-Order 15-kHz LPF (Tx)
·Programmable De/Pre-Emphasis (50/75 µs)
·Pilot Out (Tx)
·General-Purpose External Input (Tx)
·High Power Selectable RF Output (Tx)
·–7/–3/1/4 dBm
·High Cut Control (HCC), Stereo Noise Control (SNC) (Rx)
·Soft Mute (Rx)
·VCC = 2.5 V to 4 V
·40-Pin QFN Package
应用：
·手提媒体播放器
·MP3 播放器
·个人导航设备
图1SN761633方框图
图2 SN761633应用电路图