器件名称: U4289BM-MFPG3
功能描述: AM/FM PLL with 1 Switch
文件大小: 163.4KB 共10页
简 介:Features
Reference Oscillator up to 15 MHz Two Programmable 16-bit Dividers Adjustable from 2 to 65535 Fine Tuning Steps
– AM ≥ 1 kHz – FM ≥ 2 kHz Loop-push-pull Stage for AM/FM High Signal/Noise Ratio
AM/FM PLL with 1 Switch
Description
The U4289BM is an integrated circuit in BICMOS technology for frequency synthesizers. It performs all the functions of a PLL radio tuning system and is controlled by a 2-wire bus. The device is designed for all frequency synthesizer applications in radio receivers, as well as for RDS (Radio Data System) applications.
U4289BM
Figure 1. Block Diagram
14 Oscillator OSCOUT SCL SDA AS 15 2 3 4 Phase detector I2C bus interface Current sources 9 10 N-divider 1 VDD 16 GND1 12 13 PDAMO VA R-divider Switching output
OSCIN
5 11
SWO1 PDAM
FMOSC
6
PDFMO
AMOSC
8
AM/FM switch 7 GND2
PDFM
Rev. 4757A–AUDR–10/03
Pin Configuration
Figure 2. Pinning SO16
VDD SCL SDA AS SWO1 FMOSC GND 2 AMOSC
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
GND1 OSCOUT OSCIN VA PDAMO PDAM PDFMO PDFM
Pin Description
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VDD SCL SDA AS SWO1 FMOSC GND2 AMOSC PDFM PDFMO PDAM PDAMO VA OSCIN OSCOUT GND1 Function Supply voltage Bus clock Bus data Address selection Switching output FM oscillator input Ground 2 (analog) AM oscillator input FM current output FM analog output AM current output AM analog output Analog supply voltage Oscillator input Oscillator output Ground 1 (digital)
2
U4289BM
4757A–AUDR–10/03
U4289BM
Functio……
