MC44871 データシートの表示（PDF） - Motorola => Freescale

部品番号

コンポーネント説明

メーカー

MC44871

PLL Tuning Circuit with DC-DC Converter, I2C Bus and ADC

Motorola => Freescale 

Order this document by MC44871/D

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

Share Link: