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參數(shù)資料
| 型號(hào)： | MC44871DTB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | PLL TUNING CIRCUIT WITH HIGH SPEED I2C BUS AND 30 V TUNING SUPPLY |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 198K |
| 代理商： | MC44871DTB |
SEMICONDUCTOR
TECHNICAL DATA
PLL TUNING CIRCUIT
PIN CONNECTIONS
(16 Pin TSSOP)
Order this document by MC44871/D
1
16
15
14
13
12
11
10
9
2
3
4
5
6
7
8
VTUN
CP
HF1
B2
B1
B0
Amp In
B4
DTB SUFFIX
PLASTIC PACKAGE
CASE 948F
(TSSOP–16)
16
1
HF2
Gnd
Xtal
SCL
SDA
ADD
VCC
ADC
(Top View)
WITH HIGH SPEED I2C BUS
AND 30 V TUNING SUPPLY
1
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 k
)
Less Phase Comparator Output Current
Single 5.0 V Supply Operation
MOSAIC is a trademark of Motorola, Inc.
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC44871DTB
TA = –20
°
to +85
°
C
TSSOP–16
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
Motorola, Inc. 1998
Rev 1
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| MC44871DTBR2 | 制造商:Motorola Inc 功能描述: |
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