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1。SN761633方框图

来源：中电网