MC44871DTB [MOTOROLA]

PLL TUNING CIRCUIT WITH HIGH SPEED I2C BUS AND 30 V TUNING SUPPLY; 高速I2C总线30 V调谐电源PLL调谐电路
MC44871DTB
型号: MC44871DTB
厂家: MOTOROLA    MOTOROLA
描述:

PLL TUNING CIRCUIT WITH HIGH SPEED I2C BUS AND 30 V TUNING SUPPLY
高速I2C总线30 V调谐电源PLL调谐电路

文件: 总12页 (文件大小:202K)
中文:  中文翻译
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Order this document by MC44871/D  
PLL TUNING CIRCUIT  
The MC44871 is a tuning circuit for TV, VCR and Multimedia tuner  
applications. This device contains on one chip all the functions required for  
PLL control of a VCO. This integrated circuit also contains a high frequency  
prescaler and thus can handle frequencies up to 1.3 GHz.  
2
WITH HIGH SPEED I C BUS  
AND 30 V TUNING SUPPLY  
The MC44871 has an integrated dc/dc converter to generate the 30 V  
supply voltage for the tuning amplifier on the chip. A tuner using the  
MC44871 does not require an external 30 V supply.  
SEMICONDUCTOR  
TECHNICAL DATA  
2
The MC44871 is controlled by a I C bus, and has a chip address function.  
The MC44871 data format is the same as the MC44818.  
The MC44871 is manufactured on a single silicon chip using Motorola’s  
high density bipolar process, MOSAIC (Motorola Oxide Self Aligned  
Implanted Circuits).  
16  
The Pin Called V  
CC2  
for the MC44818 is Now Called CP (Charge  
Pump). This Pin is the Output of the DC/DC Converter; a 1.0 nF  
Capacitor Replaces the Need for an External 30 V Supply  
1
2
High Speed I C Bus (up to 800 kHz)  
2
I C Bus Read Mode for Lock Detector and AFC Level  
DTB SUFFIX  
PLASTIC PACKAGE  
CASE 948F  
HF Input is Balanced  
MC44871 has Three PNP High Current (30 mA) Band Buffers (B0, B1,  
(TSSOP–16)  
B2) and One NPN Low Current (5.0 mA) Band Buffer (B4)  
V  
Internally Supplies PNP Band Buffers  
CC  
The Tuning Voltage is Generated Through an External Pull–Up  
Resistor (750 k)  
PIN CONNECTIONS  
(16 Pin TSSOP)  
Less Phase Comparator Output Current  
Single 5.0 V Supply Operation  
V
Amp In  
Xtal  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
TUN  
CP  
MOSAIC is a trademark of Motorola, Inc.  
HF1  
HF2  
Gnd  
B2  
SCL  
SDA  
ADD  
V
CC  
B1  
10 ADC  
B0  
9
B4  
ORDERING INFORMATION  
Operating  
Temperature Range  
Device  
Package  
(Top View)  
MC44871DTB  
T
A
= –20° to +85°C  
TSSOP–16  
This document contains information on a new product. Specifications and information herein  
Motorola, Inc. 1998  
Rev 1  
are subject to change without notice.  
MC44871  
Figure 1. Representative Block Diagram  
V
TUN  
C4  
V
R2  
C3  
R1  
Bands Out  
C1  
C2  
V
CP  
CC  
TUN  
5.0 V 11  
2
9
6
7
8
1
DC/DC  
Converter  
16  
F
out  
B4 B2 B1 B0  
Buffers  
Amp In  
Test  
Logic  
V
ref  
F
ref  
Operational  
Amplifier  
Latches  
DTB1  
T13  
Gnd  
T14  
5
Phase  
Comp  
T10, T11  
P–On  
Reset  
DTB2  
POR  
Latches  
F
out  
F
ref  
6
SDA  
SCL  
ADD  
4
512/1024  
13  
14  
12  
CLO  
Data  
2
Shift Register  
15 Bit  
I C Bus  
Receiver  
Ref  
Divider  
15  
RL  
DTF  
Latches A  
15  
3.2 or 4.0 MHz  
Osc  
Xtal  
Latches B  
ADC  
ADC  
TDI  
10  
Preamp  
÷
8
HF1  
HF2  
Program Divider  
15 Bit  
3
4
Latch Control  
DTS  
Prescaler  
F
out  
This device contains 3,204 active transistors.  
Approximate values of the external components for generation of the tuning voltage are:  
C1 = 1.0 nF  
R1 = 750 k(560 kminimum)  
C4 = 330 pF  
Charge Pump filter capacitor  
Pull–up resistor  
V
filter capacitor  
TUN  
Loop filter  
C2 = 47 nF, C3 = 22 nF, R2 = 39 kΩ  
These component values depend on the application.  
2
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
MAXIMUM RATINGS (Maximum ratings are those values beyond which  
permanent damage to the device may occur. Exposure to those limits may also affect device  
reliability; T = 25°C, unless otherwise noted.)  
A
Rating  
Pin  
11  
Value  
Unit  
V
Power Supply Voltage (V  
Storage Temperature  
)
6.0  
CC  
–65 to +150  
°C  
°C  
V
Operating Temperature Range  
–20 to +85  
Operational Amplifier Output Voltage  
RF Input Level 80 MHz to 1.3 GHz  
NPN Band Buffer ”Off” Voltage  
1
40  
3, 4  
9
1.5  
Vrms  
V
10  
NPN Band Buffer ”On” Current  
9
15  
mA  
V
PNP Band Buffer “Off” Voltage  
6, 7, 8  
6, 7, 8  
6, 7, 8  
6, 7, 8  
6.0  
50  
PNP Band Buffer “On” Current  
mA  
PNP Band Buffer – Short Circuit Duration (Note 1)  
Continuous  
10  
Band Buffer Operation at 40 mA  
all PNP Buffers “On”  
s
NOTES: 1. At V  
= 5.0 V and T = –20° to +80°C one buffer “On” only.  
A
CC  
2. ESD data available upon request.  
ELECTRICAL CHARACTERISTICS (Parameter Type: A–100% Tested, B–100% Correlation Tested, C–Characterized on  
Samples, D–Design Parameter, V = 5.0 V, T = 25°C, unless otherwise specified, 750 kpull–up resistor between CP [Pin2] and  
CC  
A
V
TUN  
[Pin 1].)  
Characteristic  
Pin  
Min  
Typ  
Max  
Unit  
Type  
V
CC  
Supply Voltage Range  
11  
4.5  
5.0  
5.5  
V
A
V
Supply Current (All Buffers “Off”)  
35  
40  
80  
45  
50  
90  
A
B
B
CC  
One Buffer “On” when Open  
One Buffer “On” at 40 mA  
11  
mA  
PNP Band Buffer B0, B1, B2 Leakage Current when “Off”  
PNP Band Buffer B0, B1, B2 Saturation Voltage when “On” at 30 mA  
NPN Band Buffer B4 Leakage Current when “Off”  
NPN Band Buffer ”Off” Voltage  
6, 7, 8  
0.01  
200  
0.01  
1.0  
500  
1.0  
5.5  
100  
1.6  
4.05  
15  
µA  
mV  
µA  
V
A
B
A
D
A
A
D
A
A
A
A
A
6, 7, 8  
9
9
0
NPN Band Buffer B4 Saturation Voltage when “On” at 1.0 µA  
NPN Band Buffer B4 Voltage when ”On” @ 5.0 mA  
Reference Oscillator Frequency Range  
9
50  
mV  
V
9
1.2  
3.2  
0
15  
16  
16  
16  
2
3.15  
–15  
12  
2.0  
28  
MHz  
nA  
µA  
µA  
V
Phase Comparator 3–State Current  
Phase Comparator Output Current – High Value  
Phase Comparator Output Current – Low Value  
DC–DC Converter Output Voltage, Sourcing 50 µA  
DC–DC Converter Maximum Current, Output Short Circuited  
20  
28  
6.0  
31  
10  
34.5  
350  
2
200  
µA  
DC–DC Converter setting time from VCC >4.5 V to DC–DC Converter  
Voltage > 28 V @ Load = 750 k/1.0 nF  
2
25  
ms  
C
Operational Amplifier Internal Reference Voltage (V  
Operational Amplifier Input Current  
)
16  
1.3  
–15  
100  
0.3  
1.9  
0
2.5  
15  
V
nA  
A
A
A
D
D
D
ref  
Operational Amplifier DC Open Loop Gain  
300  
Operational Amplifier Gain Bandwidth Product (CL = 1.0 nF)  
Operational Amplifier Low Output Voltage, Sinking 50 µA  
Oscillator – Negative Resistance  
MHz  
V
16  
15  
0.2  
0.4  
1.0  
kΩ  
3
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
PIN FUNCTION DESCRIPTION (see Figure 1)  
Description  
Pin  
1
Symbol  
V
TUN  
CP  
Operational amplifier output which provides the tuning voltage  
DC–DC Converter output (Charge Pump)  
Symmetrical HF inputs  
2
3, 4  
5
HF1, HF2  
Gnd  
Ground  
6, 7, 8  
9
B2, B1, B0  
B4  
PNP Band Buffer outputs  
NPN Band Buffer output  
10  
11  
ADC  
Three bit ADC for Automatic Frequency Tuning, readable through the bus  
Positive supply of the circuit (5.0 V)  
Chip address function  
V
CC  
12  
13  
14  
15  
16  
ADD  
SDA  
2
I C bus Data Input/Output  
2
SCL  
I C bus Clock  
Xtal  
Crystal Oscillator (3.2 MHz or 4.0 MHz)  
Operational amplifier input  
Amp In  
HF INPUT SENSITIVITY AND OVERLOAD CHARACTERISTICS (V  
CC  
= 5.0 V, T = 25°C.) (See Figure 2.)  
A
Characteristics  
Pin  
3, 4  
3, 4  
3, 4  
3, 4  
3, 4  
Min  
Typ  
1.6  
Max  
Unit  
V
Type  
A
DC Bias (Internal)  
80–150 MHz  
10  
5.0  
10  
50  
315  
315  
315  
315  
mVrms  
mVrms  
mVrms  
mVrms  
C
150–600 MHz  
600–950 MHz  
950–1300 MHz  
C
C
C
Figure 2. HF Sensitivity Test Circuit  
Figure 3. Typical HF Sensitivity Performance  
(V = 5.0 V, Temperature = 25°C)  
CC  
10  
Bus  
Bus Controller  
0
–10  
–20  
–30  
–40  
–50  
–60  
Guaranteed Sensitivity Performance  
13  
14  
V
= 5.0 V  
11  
4
CC  
MC44871  
1.0 nF  
HF1  
3
Gnd  
5
B0  
8
B1  
7
B2  
6
B4  
9
HF Generator  
HF Out Gnd  
1.0 nF  
1.0 k  
1.0 k1.0 kΩ  
50  
Cable  
Counter  
In  
50  
0
200  
400  
600  
800  
1000  
1200  
1400  
FREQUENCY (MHz)  
NOTE: 1. Device is in test mode. B1, B2 are “On” and B0, B4 are “Off”.  
Sensitivity is level of HF generator on 50 load.  
4
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
Figure 4. Pin Circuit Schematic  
50  
10 k  
2.0 k  
20 V  
16 Amp In  
V
1
TUN  
Negative input of operational  
amplifier and phase detector  
charge pump output  
Operational amplifier  
output which provides  
the tuning voltage  
20 V  
20 V  
100  
32 V 6.0 k  
15 Xtal  
Crystal oscillator  
(3.2 MHz or 4.0 MHz)  
CP 2  
Converter output  
(Charge Pump)  
1.5 k  
5.0 V  
20 V  
20 V  
1
2
5.0 V  
5.0 V  
V
CC  
96 k  
6
5.0 V  
132 k  
500  
1/2 V  
14 SCL  
CC  
2
Clock input (I C bus)  
20 V  
96 k  
2.0 k  
2.0 k  
1.2  
1.8 V  
HF1 3  
V
Inputs to  
presealer  
CC  
96 k  
132 k  
500  
1/2 V  
13 SDA  
CC  
HF2 4  
2
Data input/output (I C bus)  
20 V  
96 k  
ACK  
V
CC  
Gnd 5  
Circuit ground  
150 k  
10 k  
12 ADD  
Chip Address  
50 k 20 V  
V
CC  
11 V  
CC  
Positive supply of the  
circuit (5.0 V)  
5.0 V  
5.0 V  
“On”/“Off”  
“On”/“Off”  
“On”/“Off”  
B2 6  
20 V  
20 V  
20 V  
10 k  
20 V  
200  
20 V  
10 ADC  
Three bit control for AFC  
PNP Band  
Buffers  
B1 7  
9 B4  
NPN Buffer  
V
CC  
B0 8  
“On”/“Off”  
5
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
2
2
HIGH SPEED I C BUS (The circuit is controlled by a I C bus with a Serial Data [SDA], Serial Clock [SCL], Chip Address  
2
Control [ADD] inputs. The device I C bus has a read mode [odd addresses] and a write mode [even addresses].  
ELECTRICAL CHARACTERISTICS (V  
= 5.0 V, T = 25°C, unless otherwise specified.)  
A
CC  
Characteristic  
Pin  
Symbol  
Min  
Typ  
Max  
10  
Unit  
µA  
V
Type  
A
SDA/SCL Output Current at 0 V  
SDA/SCL Low Input Level  
SDA/SCL High Input Level  
13, 14  
13, 14  
13, 14  
13, 14  
13, 14  
V
IL  
1.5  
B
V
IH  
3.0  
–5.0  
0
V
B
SDA/SCL Input Current for Input Level from 0.4 V to 0.3 V  
SDA/SCL Input Level  
0
5.0  
µA  
V
C
CC  
V
CC  
0.3  
+
D
ADD Input Level  
12  
–0.01  
1.1V  
D
CC  
V
CC  
SDA/SCL Capacitance  
13, 14  
13  
C
0.3  
10  
1.0  
1.5  
pF  
V
C
A
C
i
SDA Low Output Level (sinking 3.0 mA)  
SDA Low Output Level (sinking 15 mA)  
13  
V
TIMING CHARACTERISTICS  
Characteristic  
Pin  
14  
Symbol  
Min  
0
Typ  
Max  
800  
Unit  
kHz  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
Type  
C
Bus Clock Frequency  
Bus Free Time Between Stop and Start  
Setup Time for Start Conditions  
Hold Time for Start Condition  
Data Setup Time  
T
buf  
200  
500  
500  
0
C
T
C
su;sta  
hd;sta  
T
C
T
C
su;dat  
Data Hold Time  
T
0
C
hd;dat  
Setup Time for Stop Condition  
Hold time for Stop Condition  
Acknowledge Propagation Delay  
SDA Fall Time at 3.0 mA sink I and 130 pF Load  
SDA Fall Time at 3.0 mA sink I and 400 pF Load  
SDA/SCL Rise Time  
T
500  
500  
C
su;sto  
T
C
hd;sto  
T
300  
50  
80  
300  
300  
50  
C
ack;low  
13  
C
13  
C
13, 14  
13, 14  
13,14  
C
SCL Fall Time  
C
Pulse Width of Spikes Suppressed by the Input Filter  
T
sp  
C
Timings Definition  
T
buf  
Stop  
Start  
Stop  
ACK  
Start  
Chip address  
SDA  
SCL  
SDA  
SDA  
SCL  
SCL  
T
T
T
T
T
T
T
ack:low  
su;sta  
hd;sto  
su;sto hd;sta  
su;dat hd;dat  
Levels Definition  
V
CC  
V
IH  
Not Defined  
V
IL  
0 V  
6
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
2
Figure 5. High Speed I C Compatible Bus Data Format  
1
2
3
4
5
6
7
8
9
10  
18  
19  
SCL  
SDA  
STA  
Chip Address ($C2)  
First Byte  
Stop  
ACK  
ACK  
ACK  
2 or 4 Data Bytes  
2
I C Write Mode Format and Bus Receiver  
ignored. If five or more data bytes are received, the fifth and  
following ones are ignored, and the last acknowledge pulse is  
sent at the end of the fourth data byte.  
The incoming information, consisting of a chip address  
2
byte followed by two or four data bytes, is treated in the I C  
The first and the third data bytes contain a function bit  
which allows the IC to distinguish between frequency  
information and control plus band information. If the function  
bit is logic “1”, the two following bytes contain control and  
band information. The first data byte, after the chip address,  
may be byte CO or byte FM. The two bytes of frequency  
information are preceeded by a logic “0”.  
bus receiver. The definition of the permissible bus protocol is  
shown below:  
1_STA CA CO BA FM FL STO  
2_STA CA FM FL CO BA STO  
3_STA CA CO BA STO  
4_STA CA FM FL STO  
STA = Start Condition  
Chip Address  
CA = Chip Address Byte  
CO = Control Information  
BA = Band Information  
Even addresses are for write mode, and odd addresses  
are for read mode. Chip address is programmable by Pin 12  
(ADD).  
FM = Frequency Information with MSB  
FL = Frequency Information with LSB  
STO = Stop Condition  
ADD Pin 12  
Address (HEX.)  
C0/C1  
–0.01 V  
to 0.1 V  
CC  
CC  
0.2 V  
to 0.3 V  
(or Open)  
C2/C3  
Figure 5 shows the five bytes of information that are  
needed for circuit operation: the chip address, two bytes of  
control and information, and two bytes of frequency  
information.  
CC  
CC  
0.4 V  
0.8 V  
to 0.7 V  
C4/C5  
CC  
CC  
CC  
CC  
to 1.1 V  
C6/C7  
After the chip address, two or four data bytes may be  
received: if three data bytes are received, the third one is  
7
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
The Two Permissible Protocols with Five Bytes  
CA_Chip Address  
1
1
0
0
0
0/1  
0/1  
0
ACK  
CO_Control Information  
BA_Band Information  
1
T14  
X
T13  
X
T12  
B4  
T11  
X
T10  
B2  
T9  
B1  
T8  
B0  
ACK  
ACK  
X
FM_Frequency Information  
FL_Frequency Information  
0
N14  
N6  
N13  
N5  
N12  
N4  
N11  
N3  
N10  
N2  
N9  
N1  
N8  
N0  
ACK  
ACK  
N7  
CA_Chip Address  
1
1
0
0
0
0/1  
0/1  
0
ACK  
FM_Frequency Information  
FL_Frequency Information  
0
N14  
N6  
N13  
N5  
N12  
N4  
N11  
N3  
N10  
N2  
N9  
N1  
N8  
N0  
ACK  
ACK  
N7  
CO_Control Information  
BA_Band Information  
1
T14  
X
T13  
X
T12  
B4  
T11  
X
T10  
B2  
T9  
B1  
T8  
B0  
ACK  
ACK  
X
2
I C Read Mode Format  
The incoming information consists of the chip address  
byte in read mode (odd address). The device then answers  
with an acknowledge followed by a byte containing lock and  
ADC information. There is no ACK pulse sent after this byte.  
1_STA  
ADC_LO =  
CA ADC_LO  
ADC and Lock information  
2
I C Read Format  
CA_Chip Address  
1
1
1
0
0
0
0/1  
0/1  
1
ACK  
ADC_LO  
LO  
X
X
X
AD2  
AD1  
AD0  
(no ACK)  
Definition of the Bits for Test and Features  
Bits B0, B1, B2: Control the PNP Band Buffers  
Bit T10, T11: Control the Reference Divider  
B0, B1, B2 = 0  
= 1  
Buffer is “Off”, Output Low  
Buffer is “On”, Output High  
T10  
0
T11  
0
Divider Ratio  
512  
0
1
1024  
1024  
512  
Bit B4: Controls the NPN Band Buffer  
1
0
B4 = 0  
= 1  
Buffer is “Off”, Output High  
Buffer is “On”, Output Low  
1
1
Bit T9, T12: Control the Phase Comparator  
Bit T8: Controls the Operational Amplifier Output  
T9  
0
T12  
0
Function  
Upper Source Only  
T8  
T8 = 0  
= 1  
Operation  
Operational Amplifier Normal Operation  
0
1
Lower Source Only  
Normal Operation  
High Impedance  
Output State of Operational Amplifier  
Switched Off  
1
0
Output Pulls High through External Resistor  
1
1
8
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
Bit T13: Switches the Band Buffer Output to Test Mode  
OPERATING DESCRIPTION  
Introduction  
T13 = 0  
= 1  
Normal Operation  
Test Mode: F Out at B2 F  
A representative block diagram and typical system  
application are shown in Figures 1 and 8. A discussion of the  
features and function of each of the internal blocks is given.  
The Programmable Divider  
The programmable divider is a presettable down counter.  
When it has counted to zero it takes its required division ratio  
out of the latches B. Latches B are loaded from latches A by  
means of signal TDI which is synchronous to the  
programmable divider output signal.  
Out at B1  
by2  
ref  
In the test mode, B2 and B1 have to be ON (B2=B1=1).  
isthereferencefrequency. F istheoutputfrequencyof  
the programmable divider divided–by–2.  
F
ref  
by2  
Bit T14: Controls the Charge Pump Current  
T14 = 0  
= 1  
Pump Current 5.0 µA  
Pump Current 20 µA  
Since latches A receive the data asynchronously with the  
programmable divider; this double latch scheme is needed to  
assure correct data transfer to the counter.  
Bit AD2, AD1, AD0: Indicate the ADC Pin Analog Level  
The division ratio definition is given by:  
N = 16384 x N14 + 8192 x N13 + + 4 x N2 + 2 x N1 + N0  
ADC Input Voltage  
0 to 0.18 V  
AD2  
AD1  
AD0  
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
CC  
Maximum Ratio 32767  
Minimum Ratio 256  
0.18 to 0.34 V  
N0 N14 are the different bits for frequency information.  
At power–on the whole bus receiver is reset and the  
programmable divider is set to a counting ratio of N = 256 or  
higher.  
CC  
CC  
CC  
0.34 to 0.5 V  
0.5 to 0.66 V  
0.66 to 0.82 V  
CC  
CC  
The Prescaler  
0.82 to 1.0 V  
The divide–by–8 prescaler has a preamplifier which  
guarantees high input sensitivity.  
Bit LO: Indicates the Status of Lock Detetector  
The Phase Comparator  
LO = 0  
LO = 1  
PLL Status Not Locked  
PLL Status Locked  
The phase comparator is both phase and frequency  
sensitive and has very low output leakage current in the high  
impedance state.  
The Operational Amplifier  
Figure 6. Equivalent Circuit of the Integrated  
PNP Band Buffers  
The operational amplifier is designed for very low noise,  
low input bias current and high power supply rejection. The  
positive input is biased internally. The operational amplifier  
output (Pin 1) needs an external 750 kpull–up resistor (560  
kminimum). This minimum value is defined by the charge  
pump output current capability.  
V
CC  
Saturation Voltage  
0.2 V Typical  
0.5 V Max  
I
B
I
The Oscillator  
SUB  
“On”/“Off”  
The oscillator uses a 3.2 or a 4.0 MHz crystal tied to ground  
in series with a capacitor. The crystal operates in the series  
resonance mode.  
The voltage at Pin 15 has low amplitude and low harmonic  
distortion.  
30 mA (40 mA  
at 0 to 80°C)  
Out  
B0 B2  
I
I
I
+ I  
SUB  
= 5.5 mA Typical  
= Base Current  
= Substrate Current of PNP  
B
B
SUB  
Power Dissipation  
The typical power dissipation of the circuit is about  
200 mW (V  
= 15 V with external pull–up of 560 k, one  
Figure 7. Equivalent Circuit of the Integrated  
NPN Band Buffer  
TUN  
buffer “On” at 30 mA). It is calculated with the following  
formula:  
I
B1  
V
= 5.0 V  
Out B4  
CC  
200  
V
V
Pin2  
560 k  
TUN  
PD  
V
x I  
V
x V  
CC  
CC  
TUN  
I
B2  
B3  
Protection 20...25 V  
x I  
buffer  
1.2 V typ  
@ 5.0 mA  
sat  
Out  
I
32 – 15  
(
)
Example: 5 x 38  
x 15  
5
5.6 x 10  
197 mW  
”On”/”Off”  
(
)
0.20 x 30  
I
I
+ I  
+ I  
= 0.5 mA Typ  
B3  
B1  
B
B2  
= Base Current  
9
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
Figure 8. Typical Tuner Application  
IF  
External Switching  
UHF  
VHF  
B III  
8
7
6
9
10  
ADC  
Mixer  
B0  
B1  
B2 B4  
Antenna  
Filter  
14  
13  
12  
SCL  
SDA  
ADD  
Bus  
Rec  
MC44871  
B. P. Filter  
1.0 nF  
HF1  
3
F
osc  
15  
Xtal  
Program  
Divider  
Osc &  
Ref Div  
÷8  
1.0 nF  
C
Xtal  
4
HF2  
3.2/4.0 MHz  
V
11  
Phase  
Comp  
CC  
5.0 V  
V
Oscillator  
ref  
CP  
5
2
1
16  
Gnd  
C1  
R1  
AGC  
V
TUN  
R2  
C3  
C4  
(Note 1)  
C2  
NOTES: 1. 330 pF minimum is required for stability.  
2. Approximate values of the external components for generation of the tuning voltage are:  
C1 = 1.0 nF  
Charge Pump filter capacitor  
Pull–up resistor  
VTUN filter capacitor  
Loop Filter  
R1 = 750 k  
C4 = 330 pF  
C2 = 47 nF  
C3 = 22 nF  
(560 kminimum)  
Loop Filter  
R2 = 39 k  
Loop Filter  
These component values depend on the application.  
DC–DC Converter Characteristics  
The dc–to–dc converter block generates the 30 V supply  
Figure 9. Typical Charge Pump Output Current  
voltage on the chip from V . Pin 2 only needs an external  
34  
CC  
capacitor (1.0 nF) instead of an external 30 V supply. The  
charge pump switching frequency is taken from the oscillator.  
Typical charge pump output current capability at 25°C is  
shown in Figure 9.  
32  
30  
28  
26  
24  
V
= 5.5 V  
CC  
V
= 5.0 V  
CC  
V
= 4.5 V  
CC  
22  
20  
0
20  
40  
60  
80  
100  
120  
CURRENT (µA)  
10  
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
OUTLINE DIMENSIONS  
DTB SUFFIX  
PLASTIC PACKAGE  
CASE 948F–01  
(TSSOP–16)  
ISSUE O  
16X KREF  
0.10 (0.004)  
M
S
S
T
U
V
S
0.15 (0.006) T  
U
K
K1  
NOTES:  
1
DIMENSIONING AND TOLERANCING PER ANSI  
Y14.5M, 1982.  
16  
9
2X L/2  
J1  
2
3
CONTROLLING DIMENSION: MILLIMETER.  
DIMENSION A DOES NOT INCLUDE MOLD FLASH.  
PROTRUSIONS OR GATE BURRS. MOLD FLASH  
OR GATE BURRS SHALL NOT EXCEED 0.15  
(0.006) PER SIDE.  
DIMENSION B DOES NOT INCLUDE INTERLEAD  
FLASH OR PROTRUSION. INTERLEAD FLASH OR  
PROTRUSION SHALL NOT EXCEED  
0.25 (0.010) PER SIDE.  
DIMENSION K DOES NOT INCLUDE DAMBAR  
PROTRUSION. ALLOWABLE DAMBAR  
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN  
EXCESS OF THE K DIMENSION AT MAXIMUM  
MATERIAL CONDITION.  
B
–U–  
SECTION N–N  
L
J
4
5
PIN 1  
IDENT.  
8
1
N
0.25 (0.010)  
S
0.15 (0.006) T  
U
A
M
6
7
TERMINAL NUMBERS ARE SHOWN FOR  
REFERENCE ONLY.  
DIMENSION A AND B ARE TO BE DETERMINED  
AT DATUM PLANE –W–.  
–V–  
N
F
MILLIMETERS  
INCHES  
DIM  
A
B
C
D
F
G
H
J
J1  
K
MIN  
4.90  
4.30  
–––  
0.05  
0.50  
MAX  
5.10  
4.50  
1.20  
0.15  
0.75  
MIN  
MAX  
0.200  
0.177  
0.047  
0.006  
0.030  
0.193  
0.169  
–––  
0.002  
0.020  
DETAIL E  
–W–  
C
0.65 BSC  
0.026 BSC  
0.18  
0.09  
0.09  
0.19  
0.19  
0.28  
0.20  
0.16  
0.30  
0.25  
0.007  
0.004  
0.004  
0.007  
0.007  
0.011  
0.008  
0.006  
0.012  
0.010  
0.10 (0.004)  
H
DETAIL E  
SEATING  
PLANE  
–T–  
D
G
K1  
L
6.40 BSC  
0.252 BSC  
M
0
8
0
8
11  
MOTOROLA ANALOG IC DEVICE DATA  
MC44871  
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding  
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and  
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola  
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,includingTypicals”  
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of  
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other  
applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury  
ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola  
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees  
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that  
Motorola was negligent regarding the design or manufacture of the part. Motorola and  
Opportunity/Affirmative Action Employer.  
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal  
Mfax is a trademark of Motorola, Inc.  
How to reach us:  
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;  
JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 141,  
P.O. Box 5405, Denver, Colorado 80217. 1–303–675–2140 or 1–800–441–2447 4–32–1 Nishi–Gotanda, Shagawa–ku, Tokyo, Japan. 03–5487–8488  
Customer Focus Center: 1–800–521–6274  
Mfax : RMFAX0@email.sps.mot.com – TOUCHTONE 1–602–244–6609  
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,  
Motorola Fax Back System  
– US & Canada ONLY 1–800–774–1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298  
– http://sps.motorola.com/mfax/  
HOME PAGE: http://motorola.com/sps/  
MC44871/D  

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