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MC144144

更新时间： 2024-02-23 06:17:06
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 解码器
页数 文件大小 规格书
44页 568K
描述
Enhanced Closed-Caption Decoder CMOS

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MC144144 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：DIP, DIP18,.3Reach Compliance Code：unknown
风险等级：5.92Is Samacsys：N
商用集成电路类型：CONSUMER CIRCUITJESD-30 代码：R-PDIP-T18
JESD-609代码：e0端子数量：18
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：DIP
封装等效代码：DIP18,.3封装形状：RECTANGULAR
封装形式：IN-LINE电源：5 V
认证状态：Not Qualified子类别：Other Consumer ICs
最大压摆率：20 mA表面贴装：NO
技术：CMOS温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
Base Number Matches：1

MC144144 数据手册

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Order this document  
by MC144144/D  
SEMICONDUCTOR TECHNICAL DATA  
Advance Information  
CMOS  
18  
The MC144144 is a Line 21 closed–caption decoder for use in television  
receivers or set–top decoders conforming to the NTSC standard. Capability for  
processing and displaying all of the latest standard Line 21 closed–caption  
format transmissions is included. The device requires a closed–caption  
encoded composite video signal, a horizontal sync signal, and an external  
keyer to produce captioned video. RGB and box signal outputs are provided,  
which along with the mode select, allow simple interfacing to either color or  
black–and–white TV receivers.  
P SUFFIX  
PLASTIC DIP  
CASE 707  
1
ORDERING INFORMATION  
MC144144P  
Plastic DIP  
Display storage is accomplished with an on–chip RAM. A modified ASCII  
character set, which includes several non–English characters, is decoded by an  
on–chip ROM. An on–screen character appears as a white or colored dot matrix  
on a black background.  
Captions (video–related information) can be up to four rows appearing  
anywhere on the screen and can be displayed in two modes: roll–up, paint–on,  
or pop–on. With rollup captions, the row scrolls up and new information appears  
at the bottom row each time a carriage return is received. Pop–on captions work  
with two memories. One memory is displayed while the other is used to  
accumulate new data. A special command causes the information to be  
exchanged in the two memories, thus causing the entire caption to appear at  
once.  
PIN ASSIGNMENT  
V
1
2
3
4
5
6
18  
17  
16  
15  
14  
13  
RED  
SS  
GREEN  
BLUE  
SEN  
BOX  
SDO  
SCK  
HIN  
SDA  
SMS  
VIN/INTRO  
VIDEO  
CSYNC  
LPF  
7
8
9
12  
11  
10  
V
When text (non–video related information) is displayed, the rows contain a  
maximum of 32 characters over a black box which overwrites the screen.  
Fifteen rows of characters are displayed in the text mode.  
DD  
V
(A)  
SS  
RREF  
An on–chip processor controls the manipulation of data for storage and  
display. Also controlled are the loading, addressing, and clearing of the display  
RAM. The processor transfers the data received to the RAM during scan lines  
21 through 42. The operation of the display RAM, character ROM, and output  
logic circuits are controlled during scan lines 43 through 237. The functions of  
the MC144144 are controlled via a serial port which may be configured to be  
2
either I C or SPI.  
•
Conforms to FCC Report and Order as Amended by the Petition for  
Reconsideration on Gen. Doc. 91–1  
•
•
Conforms to EIA–608 for XDS Data Structure  
Supports Four Different Data Channels for Field 1 and Five Different Data  
Channels for Field 2, Time Multiplexed within the Line 21 Data Stream:  
Captions Utilizing Languages 1 and 2, Text Utilizing Languages 1 and 2  
and XDS Support  
•
•
•
•
•
•
•
Output Logic Provides Hardware Underline Control and Italics Slant Generation  
Single Supply, Operating Voltage Range: 4.75 to 5.25 V  
Supply Current: 20 mA (Preliminary)  
Operating Temperature Range: 0 to 70°C  
Composite Video Input Range: 0.7 to 1.4 V p–p  
Horizontal Input Polarity: Either Positive or Negative  
Internal Timing and Sync Signals Derived from On–Chip VCO  
In this document, the term ‘user’ refers to the television or VCR designer. The user may choose to make certain optional features selectable by  
the viewer. These features then become viewer options.  
This document contains information on a new product. Specifications and information herein are subject to change without notice.  
REV 1  
11/95  
Motorola, Inc. 1995  
1234567...44

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