U4283BM Datasheet, PDF (1/9 Pages) TEMIC Semiconductors – AM / FM - PLL

AM / FM - PLL
U4283BM
Description
The U4283BM is an integrated circuit in BICMOS
technology for frequency synthesizer. It performs all the
functions of a PLL radio tuning system and is controlled
by I²C bus. The device is designed for all frequency
synthesizer applications of 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
y D Fine tuning steps: AM 1 kHz
y FM 2 kHz
D Three programmable switching outputs
(open drain up to 20 V)
D Few external component requirements due
to integrated loop-transistor for AM/FM
D High signal/ noise ratio
Block Diagram
OSCIN
OSCOUT
18
Oscillator
19
2
SCL
SDA ³
4
AS
I²C–BUS
Interface
FMOSC ^{10 Preamplifier :} 2
AMOSC ^{12 Preamplifier}
AM/FM
switch
11
GND 2
R-Divider
Latch
Shift register
Latch
N–Divider
1
VDD
Figure 1.
PRT SWO1 SWO2 SWO3 AM/FM
56
78
9
Switching outputs
Latch
Status
Phase
detector
20
GND 1
14
Current
sources
15
13
Analogue
outputs ¹⁶
PDFM
PDAM
PDFMO
PDAMO
Lock 17 _LD
detector
94 8054 e
Ordering and Package Information
Extended Type Number
U4283BM-BFL
U4283BM-BFLG3
U4283BM-BFS
Package
SO20 plastic
SO20 plastic
SSO20 plastic
Remarks
Taping according to IEC-286-3
TELEFUNKEN Semiconductors
1 (9)
Rev. A1, 15-May-96
Preliminary Information