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PDF MC44871 Data sheet ( Hoja de datos )
| Número de pieza | MC44871 | |
| Descripción | PLL TUNING CIRCUIT WITH HIGH SPEED I2C BUS AND 30 V TUNING SUPPLY | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Advance Information
PLL Tuning Circuit with DC-DC
Converter, I2C Bus and ADC
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.
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.
The MC44871 is controlled by a I2C 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).
• The Pin Called VCC2 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
• High Speed I2C Bus (up to 800 kHz)
• I2C Bus Read Mode for Lock Detector and AFC Level
• HF Input is Balanced
• MC44871 has Three PNP High Current (30 mA) Band Buffers (B0, B1,
B2) and One NPN Low Current (5.0 mA) Band Buffer (B4)
• VCC Internally Supplies PNP Band Buffers
• The Tuning Voltage is Generated Through an External Pull–Up
Resistor (750 kΩ)
• Less Phase Comparator Output Current
• Single 5.0 V Supply Operation
MOSAIC is a trademark of Motorola, Inc.
Device
MC44871DTB
ORDERING INFORMATION
Operating
Temperature Range
TA = –20° to +85°C
Package
TSSOP–16
MC44871
PLL TUNING CIRCUIT
WITH HIGH SPEED I2C BUS
AND 30 V TUNING SUPPLY
SEMICONDUCTOR
TECHNICAL DATA
16
1
DTB SUFFIX
PLASTIC PACKAGE
CASE 948F
(TSSOP–16)
PIN CONNECTIONS
(16 Pin TSSOP)
VTUN 1
CP 2
HF1 3
HF2 4
Gnd 5
B2 6
B1 7
B0 8
16 Amp In
15 Xtal
14 SCL
13 SDA
12 ADD
11 VCC
10 ADC
9 B4
(Top View)
This document contains information on a new product. Specifications and information herein
arMe OsuTbjOecRt tOo cLhAangAeNwAithLoOut GnotIiCce.DEVICE DATA
© Motorola, Inc. 1998
Rev 1
1
1 page  
MC44871
Figure 4. Pin Circuit Schematic
VTUN 1
Operational amplifier
output which provides
the tuning voltage
50
20 V
20 V
10 k 2.0 k
20 V
16 Amp In
Negative input of operational
amplifier and phase detector
charge pump output
CP 2
Converter output
(Charge Pump)
32 V 6.0 kΩ
20 V 1
20 V 2
5.0 V
5.0 V
100
1.5 k 5.0 V
HF1 3
Inputs to
presealer
HF2 4
6 5.0 V
VCC
96 k
1/2 VCC
2.0 k
1.2 … 1.8 V
2.0 k
96 k
VCC
96 k
1/2 VCC
96 k
132 k
500
20 V
132 k
500
20 V
ACK
Gnd 5
Circuit ground
VCC
VCC
150 k
10 k
50 k 20 V
15 Xtal
Crystal oscillator
(3.2 MHz or 4.0 MHz)
14 SCL
Clock input (I2C bus)
13 SDA
Data input/output (I2C bus)
12 ADD
Chip Address
B2 6
“On”/“Off”
20 V
11 VCC
5.0 V Positive supply of the
circuit (5.0 V)
5.0 V
PNP Band
Buffers
B1 7
“On”/“Off”
20 V
VCC
10 k
20 V
200
20 V
10 ADC
Three bit control for AFC
9 B4
NPN Buffer
B0 8
“On”/“Off”
20 V
“On”/“Off”
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page 
MC44871
OUTLINE DIMENSIONS
DTB SUFFIX
PLASTIC PACKAGE
CASE 948F–01
(TSSOP–16)
ISSUE O
0.15 (0.006) T U S
16
2X L/2
L
PIN 1
IDENT.
1
0.15 (0.006) T U S
0.10 (0.004)
–T– SEATING
PLANE
D
C
16X K REF
0.10 (0.004) M T U S V S
A
–V–
G
K
9
B
–U– J
8
N
N
K1
NOTES:
1 DIMENSIONING AND TOLERANCING PER ANSI
ÇÉÇÉÇÉJ1
Y14.5M, 1982.
2 CONTROLLING DIMENSION: MILLIMETER.
ÇÉÇÉÇÉ 3 DIMENSION A DOES NOT INCLUDE MOLD FLASH.
SECTION N–N
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
4 DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED
0.25 (0.010) PER SIDE.
5 DIMENSION K DOES NOT INCLUDE DAMBAR
0.25 (0.010)
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
M MATERIAL CONDITION.
6 TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7 DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
F
DETAIL E
H DETAIL E
MILLIMETERS
INCHES
DIM MIN MAX MIN MAX
A 4.90 5.10 0.193 0.200
B 4.30 4.50 0.169 0.177
C ––– 1.20 ––– 0.047
D 0.05 0.15 0.002 0.006
–W–
F
G
0.50 0.75 0.020 0.030
0.65 BSC
0.026 BSC
H 0.18 0.28 0.007 0.011
J 0.09 0.20 0.004 0.008
J1 0.09 0.16 0.004 0.006
K 0.19 0.30 0.007 0.012
K1 0.19 0.25 0.007 0.010
L 6.40 BSC
0.252 BSC
M 0_ 8_ 0_ 8_
MOTOROLA ANALOG IC DEVICE DATA
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MC44871.PDF ] | |
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