Datasheet > MM74C911

MM74C911

更新时间： 2024-09-08 22:46:07

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		显示控制器
页数	文件大小	规格书
8页	93K
描述
4-Digit Expandable Segment Display Controller

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中文翻译

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数据手册

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MM74C911 数据手册

October 1987

Revised January 1999

MM74C911

4-Digit Expandable Segment Display Controller

The digit outputs directly drive the base of the digit transis-

General Description

tor when the control pin labeled DIGIT INPUT OUTPUT,

DIO, is LOW. When DIO is HIGH, the digit lines turn into

inputs and the internal scanning multiplexer is disabled.

The MM74C911 display controller is an interface element

with memory that drives a 4-digit, 8-segment LED display.

The MM74C911 allows individual control of any segment in

the 4-digit display. The number of segments per digit can

be expanded without any external components. For exam-

ple, two MM74C911’s can be cascaded to drive a 16-seg-

ment alpha-numeric display.

When any digit line is forced HIGH by an external device,

usually another MM74C911, the data information for that

digit is presented to the output. In this manner, 16-segment

alpha-numeric displays, 24- or 32-segment displays, or an

array of discrete LED's can be controlled by the simple cas-

cading of expandable segment display controllers. All

inputs except digit inputs are TTL compatible and do not

The display controllers receive data information through 8

data lines a, b…DP, and digit information through

address inputs K1 and K2. The input data is written into the

ENABLE, CE, and WRITE ENABLE, WE, are LOW and is

latched when either CE or WE return HIGH. Data hold time

is not required.

clamp input voltages above V_CC

Features

■ Direct segment drive (100 mA typ.) 3-STATE

A self-contained internal oscillator sequentially presents

the stored data to high drive (100 mA typ.) 3-STATE output

drivers which directly drive the LED display. The drivers are

active when the control pin labeled SEGMENT OUTPUT

ENABLE, SOE, is LOW and go into 3-STATE when SOE is

HIGH. This feature allows for duty cycle brightness control,

or for disabling the output drive for power conservation.

■ 4 registers addressed like RAM

■ Internal oscillator and scanning circuit

■ Direct base drive to digit transistor

■ Segment expandability without external components

■ TTL compatible inputs

■ Power saver mode—5 µW (typ.)

Ordering Code:

Order Number Package Number

Package Description

MM74C991N

N28B

28-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS−010, 0.600” Wide

Connection Diagram

Pin Assignments for DIP

Top View

DS005915.prf

www.fairchildsemi.com

12 3 4 5 6 7 8

中文翻译

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与MM74C911相关器件

型号	品牌	获取价格	描述	数据表
MM74C911J	NSC	获取价格	IC,LED DISPLAY DRIVER,CMOS,DIP,28PIN,CERAMIC
MM74C911J/A+	NSC	获取价格	IC,LED DISPLAY DRIVER,CMOS,DIP,28PIN,CERAMIC
MM74C911N	TI	获取价格	LED DISPLAY DRIVER, PDIP28, PLASTIC, DIP-28
MM74C911N	FAIRCHILD	获取价格	LED Driver, 8-Segment, CMOS, PDIP28, 0.600 INCH, PLASTIC, MS-010, DIP-28
MM74C911N	ROCHESTER	获取价格	LED Driver, 8-Segment, CMOS, PDIP28, 0.600 INCH, PLASTIC, MS-010, DIP-28
MM74C911N/A+	NSC	获取价格	IC,LED DISPLAY DRIVER,CMOS,DIP,28PIN,PLASTIC
MM74C911N/B+	NSC	获取价格	IC,LED DISPLAY DRIVER,CMOS,DIP,28PIN,PLASTIC
MM74C912	FAIRCHILD	获取价格	6-Digit BCD Display Controller/Driver
MM74C912	NSC	获取价格	6-BIT BCD/HEX DISPLAY CONTROLLER/DRIVER
MM74C912J	NSC	获取价格	IC,LED DISPLAY DRIVER,8-SEG,COMMON-CATHODE,CMOS,DIP,28PIN,CERAMIC

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