Page 1
AM / FM - PLL
Description
The U4280BM is an integrated circuit in BICMOS
technology for frequency synthesizer. It performs all the
functions of a PLL radio tuning system and is controlled
Features
D
Frequency range up to 150 MHz
D
Pre-amplifier for AM and FM
D
Fine tuning steps: AM y 1kHz
FM y 2 kHz
D
Two programmable 16-bit divider,
adjustable from 2 to 65535
Ordering Information
U4280BM
2
C bus. The device is designed for all frequency
by I
synthesizer applications of radio receivers, as well as
RDS (Radio Data System) applications.
D
Reference oscillator up to 15 MHz
D
5 programmable switching outputs,
4 are open drain outputs up to 15 V
D
Phase detector with separate outputs for AM and FM
2
D
Controlled via I
C bus
Extended Type Number Package Remarks
U4280BM-B DIP20
U4280BM-BFL SO20
Block Diagram
PRT SWO1 SWO2 SWO3 AM/FM
OSCIN
OSCOUT
SCL
SDA
AS
AMOSC
18
19
2
3
4
12
Oscillator
I2C – BUS
interface
Preamplifier
AM / FM–
switch
R – Divider Switching outputs
Latch
Shift register
Latch
N – Divider
5 6789
Latch
Status
Phase
detector
Current
sources
Analog
outputs
14
15
13
16
PDFM
PDAM
PDFMO
PDAMO
10
FMOSC
Preamplifier : 2
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
11
GND2
Figure 1. Block diagram
1
V
DD
20
GND1
Preliminary Information
Lock
detector
17
13346
LD
1 (9)
Page 2
U4280BM
Pin Description
V
DD
SCL
SDA
AS
PRT
SWO1
SWO2
SWO3
AM/FM
FMOSC
1
2
3
4
5
6
7
8
9
10
Figure 2. Pinning
13319
20
19
18
17
16
15
14
13
12
11
GND
1
OSCOUT
OSCIN
LD
PDAMO
PDAM
PDFM
PDFMO
AMOSC
GND
Pin Symbol Function
1 V
2 SCL I2C bus clock
3 SDA I2C bus data
4 AS Address selection
5 PRT Switching port
6 SWO1 Switching output 1
7 SWO2 Switching output 2
8 SWO3 Switching output 3
9 AM/FM Switching output AM/FM
10 FMOSC FM oscillator input
11 GND2 Ground 2 (analog)
12 AMOSC AM oscillator input
13 PDFMO FM analog output
14 PDFM FM current output
15 PDAM AM current output
16 PDAMO AM analog output
17 LD Lock detect
18 OSCIN Oscillator input
19 OSCOUT Oscillator output
20 GND1 Ground 1 (digital)
DD
Supply voltage
Functional Description
The U4280BM is controlled via the 2-wire I2C bus. For
programming there are one module address byte, two
subaddress bytes and five data bytes.
The module address contains a programmable address bit
A 1 which with address select input AS (Pin 4) makes it
possible to operate two U4280BM-B in one system. If bit
A 1 is identical with the status of the address select input
AS, the chip is selected.
The subaddress determines which one of the data bytes is
transmitted first. If subaddress of R-divider is
transmitted, the sequence of the next data bytes is DB 0
(Status), DB 1 and DB 2.
If subaddress of N-divider is transmitted, the sequence of
the next data bytes is DB 3 and DB 4. The bit organisation
of the module address, subaddress and 5 data bytes are
shown in figure 2
2 (9)
Preliminary Information
2
Each transmission on the I
“START”-condition and has to be ended by the “STOP”condition (see figure 3).
The integrated circuit U 4283 BM has two separate inputs
for AM and FM oscillator. Pre-amplified AM signal is
directed to the 16 bit N-divider via AM/FM switch,
whereas (pre-amplified) FM signal is first divided by a
fixed prescaler (:2). AM/FM switch is controlled by
software. Tuning steps can be selected by 16 bit
R-divider. Further there is a digital memory phase
detector. There are two separate current sources for AM
and FM amplifier (charge pump) as given in electrical
characteristics. It allows independent adjustment of gain,
whereby providing high current for high speed tuning and
low current for stable tuning.
TELEFUNKEN Semiconductors
C bus begins with the
Rev . A1, 10-Apr-97
Page 3
U4280BM
Bit Organization
MSB LSB
Module address 1 1 0 0 1 0 0/1 0
A7 A6 A5 A4 A3 A2 A1 A0
Subaddress (R-divider) X X X X 0 1 X X
Subaddress (N-divider) X X X X 1 1 X X
MSB LSB
Data byte 0 (Status) PRT SWO1 SWO2 SWO3 AM/
FM
D7 D6 D5 D4 D3 D2 D1 D0
PD
ANA
PD
POL
PD
CUR
Data byte 1 2
Data byte 2 2
Data byte 3 2
Data byte 4 2
AM/FM FM-operation AM-operation
PD - ANA PD analog TEST
PD - POL Negative polarity Positive polarity
PD - CUR Output current 2 Output current 1
15
15
R-divider 2
7
7
LOW HIGH
Figure 3.
R-divider 2
N-divider 2
N-divider 2
8
0
8
0
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
3 (9)
Preliminary Information
Page 4
U4280BM
Transmission Protocol
MSB LSB
S Address
A7 A0
MSB LSB
S Address
A7 A0
S = Start P = Stop A = Acknowledge
Absolute Maximum Ratings
Supply voltage Pin 1 V
Input voltages Pins 2, 3, 4, 10, 12, 18 and 19 V
Output currents Pins 3, 5, 6, 7, 8 and 9 I
Output drain voltage Pins 6, 7, 8 and 9 V
Ambient temperature range T
Storage temperature range T
A Subaddress
R-divider
A Subaddress
N-divider
Parameters Symbol Value Unit
A Data 0 A Data 1 A Data 2 A P
A Data 3 A Data 4AA P
Figure 4.
DD
O
OD
amb
stg
–0.3 to +6 V
I
–0.3 to V
–25 to +85 °C
–40 to +125 °C
+ 0.3 V
DD
–1 to +5 mA
20 V
Thermal Resistance
Parameters Symbol Value Unit
Junction ambient R
thJA
160 K/W
4 (9)
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
Preliminary Information
Page 5
Electrical Characteristics
VDD = 5 V, T
Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit
Supply voltage range Pin 1 V
Quiescent supply voltage Pin 1 I
FM input sensitivity RG = 50
AM input sensitivity RG = 50
Oscillator input sensitivity RG = 50
Adjustable divider
Switching output, PRT Pin 5
SWO1 to SWO3, AM/FM
(open drain outputs)
LD (open drain) Pin 17
Phase detector
PDFM Pin 14
PDAM Pin 15
Analog output Pins 14 and 15 to V
I2bus inputs SCL, SDA H input voltage, Pins 2 and 3
Output voltage I
Clock frequency Pin 2 f
Bus timing
Rise time SCL, SDA t
Fall time SCL, SDA t
“H” phase SCL t
“L” phase SCL t
Waiting time START t
Set up time START t
Set up time STOP t
Set up time DATA t
Hold time DATA t
= 25°C, otherwise specified
amb
= 30 to 60 MHz
f
i
= 70 to 120 MHz
f
i
= 120 to 130 MHz
f
i
= 0.4 to 35 MHz V
f
i
= 0.1 to 15 MHz V
f
1)
i
= 1 mA
I
H
= 1 mA
I
L
= 0.1 mA
I
L
= 1 mA
I
L
= 0.1 mA
I
L
= 1 mA V
I
L
Output current 1
Output current 2
Output current 1
Output current 2
Pins 14 and 15 to GND
L input voltage, Pins 2 and 3
SDAH
W
W
W
Pin 10
Pin 12
Pin 18
Pins 6 to 9
DD
= 3 mA V
DD
DD
V
V
V
V
OH
V
OL
V
OL
V
OL
V
OL
OL
I
O1
I
O2
I
O1
I
O2
I
13,16
I
13,16
V
IH
V
IL
SCL
H
L
wSTA
hSTA
sSTA
sDAT
hDAT
I
i
i
i
i
O
r
f
U4280BM
4.5 5.0 5.5 V
6.0 11.6 mA
50
25
50
25 mV
100 mV
2 65535
VDD – 0.4
0.4
0.1
0.4
0.1
0.4 V
±400
±100
±75
±20
0.1
3
0
0 110 kHz
4
4.7
4
4
4.7
250 ns
0
±500
±125
±100
±25
–1
0.5
±600
±150
±100
±30
–2 mA
V
DD
1.5
0.4 V
1
300 ns
mV
mV
mV
V
V
V
V
V
m
m
m
m
mA
V
V
m
m
m
m
m
m
m
A
A
A
A
s
s
s
s
s
s
s
1)
FM input frequency is additionally divided by two (Pin 10).
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
5 (9)
Preliminary Information
Page 6
U4280BM
Bus Timing
t
wSTA
SDA
SCL
t
HIGH
t
sSTA
t
hSTA
START CLOCK STOPDATACHANGE
V
DD
t
LOW
t
r
t
sDAT
Figure 5. Bus timing
t
f
t
sSTO
t
hDAT
13347
3 kΩ
PDFM
PDAM
22 kΩ
Figure 6. Analog outputs PDFMA, PDAMA
6 (9)
13 PDFMA
16 PDAMA
13401
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
Preliminary Information
Page 7
Application Circuit
U4280BM
C
1 µF
1
C
2
100 nF
V
DD
R
5
4.7 kΩ
1.5 kΩ
4 MHz
C
4
22 pF
20
19 18 17 16 15 14 13
R
4
22 pF
LD Test out
C
5
C
6
82 pF
100 nF
180 kΩ
AM input
R
C
7
C
R
8
8
2.2 nF
12 11
6
15 kΩ
V
tune
FM–Tuner
VCO
30 V
U4280BM
FM
123
2
I
C – Master –Transmitter
4
56
R
2
750 Ω
7
R
1
3.9 kΩ
8
R
3
Ω
300
9 10
LED
C
1 nF
3
13348
Figure 7. Application circuit
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
7 (9)
Preliminary Information
Page 8
U4280BM
Package Information
Package DIP20 (CEI)
Dimensions in mm
20 11
110
Package SO20
Dimensions in mm
1.65
1.14
12.95
12.70
26.42
25.40
22.86
2.54
3.81
3.18
3.80
3.05
0.89
0.38
0.38
0.20
technical drawings
according to DIN
specifications
7.87
7.37
6.6
6.1
9.40
7.62
13042
9.15
8.65
7.5
7.3
2.35
0.4
1.27
11.43
20 11
110
0.25
0.10
technical drawings
according to DIN
specifications
10.50
10.20
0.25
13038
8 (9)
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
Preliminary Information
Page 9
U4280BM
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol ( 1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
TELEFUNKEN Semiconductors
Rev . A1, 10-Apr-97
9 (9)
Preliminary Information
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