器件名称: U4289BM
功能描述: AM / FM - PLL
文件大小: 134.17KB 共10页
简 介:U4289BM
AM / FM - PLL
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 an I2C bus. The device is designed for all frequency synthesizer applications in radio receivers, as well as RDS ( Radio Data System ) applications.
Features
D Reference oscillator up to 15 MHz D Two programmable 16 bit dividers
adjustable from 2 to 65535
D Fine tuning steps:
AM FM
D High signal/noise ratio
D Few external component required due to integrated
loop-push-pull stage for AM/FM
y 1 kHz y 2 kHz
Ordering and Package Information
Extended Type Number U4289BM-AFP U4289BM-AFPG3 Package SO16 plastic SO16 plastic Remarks Taping according to IEC-286-3
Block Diagram
OSCIN 14 Oscillator OSCOUT 15 SCL SDA AS FMOSC 2 3 4 6 Phase detector I2C bus interface Current sources 9 10 N-divider 1 VDD Figure 1. 16 GND1 12 13 PDAMO VA R-divider Switching output 5 11 SWO1 PDAM
PDFMO PDFM
AMOSC 8
AM/FM switch 7 GND2
95 10822
TELEFUNKEN Semiconductors Rev. A2, 14-May-97
1 (10)
U4289BM
Pin Description
VDD SCL 1 2 3 4 5 6 7 8
95 10823
16 15 14 13 12 11 9 10
GND1 OSCOUT OSCIN VA PDAMO PDAM PDFM PDFMO
SDA AS SWO1 FMOSC GND 2 AMOSC
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Symbol VDD SCL SDA AS SWO1 FMOSC GND 2 AMOSC PDFMO PDFM PDAM PDAMO VA OSCIN OSCOUT GND1
Function Supply voltage I2C bus clock I2C bus data Address selection Switching output FM oscillator input Ground 2 (analo……
