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Número de pieza | U4285BM | |
Descripción | AM / FM - PLL | |
Fabricantes | TEMIC Semiconductors | |
Logotipo | ||
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No Preview Available ! AM / FM - PLL
U4285BM
Description
The U4285BM 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:
yAM 1 kHz
yFM 2 kHz
D 4 programmable switching outputs
(open drain up to 15 V)
D Few external component required due to
integrated loop-push-pull stage for AM/FM
D High signal/ noise ratio
Ordering Information
Extended Type Number
U4285BM-AFS
U4285BM-AFSG3
Package
SSO20 plastic
SSO20 plastic
Remarks
Taping according to IEC-286-3
Block Diagram
OSCIN 18
OSCOUT
19
SCL 2
SDA 3
AS 4
Oscillator
I2C bus
interface
FMOSC 9
AMOSC 11
AM/FM
switch
10
GND2
R-divider
SWO1 SWO2 SWO3 SWO4
5678
Switching outputs
Phase
detector
Current
sources
N-divider
1
VDD
Figure 1.
20
GND1
14 PDAM
15 PDAMO
16 VA
17 C
12 PDFMO
13 PDFM
95 10120
TELEFUNKEN Semiconductors
Rev. A3, 14-May-97
1 (10)
1 page Electrical Characteristics
VDD = 5 V, VA = 10 V, Tamb = 25°C, unless otherwise specified
Parameters
Test conditions / Pin
Symbol
Supply voltage
Pin 1
VDD
Quiescent supply current AM-mode
FM-mode
WFM input sensitivity, RG = 50 FMOSC
Pin 1
IDD
fi = 70 to 120 MHz
Pin 9 VSFM
Wfi = 160 MHz
AM input sensitivity, RG = 50 AMOSC
Pin 9 VSFM
Wfi = 0.6 to 35 MHz
Pin 11 VSAM
Oscillator input sensitivity, RG = 50 OSCIN
fi = 0.1 to 15 MHz
Pin 18 VSOSC
Switching output SWO 1, SWO 2, SWO 3, SWO 4 (open drain)
Output voltage
LOW
Output leakage current
HIGH
Pins 5, 6, 7 and 8
IL = 1 mA
Pins 5, 6, 7 and 8
V5, V6, V7, V8 = 10 V
VSWOL
IOHL
Phase detector PDFM
Output current 1
Output current 2
Leakage current
Phase detector PDAM
Output current 1
Output current 2
Leakage current
Analogue output PDFMO, PDAMO
"Pin 13
"Pin 13
"Pin 13
IPDFM
IPDFM
IPDFML
Pin 14
Pin 14
Pin 14
"IPDAM
"IPDAM
"IPDAM-
L
Saturation voltage
LOW
HIGH
I2C bus SCL, SDA, AS
Pins 12 and 15
I = 15 mA
VsatL
VsatH
Input voltage
HIGH
LOW
Pins 2, 3 and 4 ViBUS
Output voltage
Acknowledge LOW
Clock frequency
Rise time SDA, SCL
Fall time SDA, SCL
Period of SCL
HIGH
LOW
ISDA = 3 mA
Pin 3
Pin 2
Pins 2 and 3
Pins 2 and 3
HIGH
LOW
Pin 2
VO
fSCL
tr
tf
tH
tL
Min.
4.5
40
150
40
100
1600
400
160
40
9.5
3.0
0
4.0
4.7
U4285BM
Typ. Max. Unit
5.0 5.5 V
4.0 7.0 mA
4.0 7.0
mVrms
mVrms
mVrms
mVrms
100 400 mV
100 nA
2000
500
2400
600
20
mmAA
nA
200
50
240
60
mmAA
20 nA
200 400 mV
9.95 V
VDD
V
1.5 V
0.4 V
100 kHz
1 ms
300 ns
mmss
TELEFUNKEN Semiconductors
Rev. A3, 14-May-97
5 (10)
5 Page |
Páginas | Total 10 Páginas | |
PDF Descargar | [ Datasheet U4285BM.PDF ] |
Número de pieza | Descripción | Fabricantes |
U4285BM | AM / FM - PLL | TEMIC Semiconductors |
U4285BM-AFS | AM / FM - PLL | TEMIC Semiconductors |
U4285BM-AFSG3 | AM / FM - PLL | TEMIC Semiconductors |
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