MM74C911N Fairchild Semiconductor, MM74C911N Datasheet

MM74C911N

Manufacturer Part Number

MM74C911N

Description

IC CONTROLLER DISPLAY 28-DIP

Manufacturer

Fairchild Semiconductor

Datasheet

1.MM74C911N.pdf (8 pages)

Specifications of MM74C911N

Display Type

LED

Configuration

7 Segment + DP

Digits Or Characters

4 Digits

Current - Supply

500µA

Voltage - Supply

3 V ~ 6 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Through Hole

Package / Case

28-DIP (0.600", 15.24mm)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Interface

Lead Free Status / Rohs Status

Other names

74C911
74C911N

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MM74C911N

Manufacturer:

MICROCHIP

Quantity:

1 200

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MM74C991N

MM74C911

4-Digit Expandable Segment Display Controller

General Description

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.

The display controllers receive data information through 8

data lines a, b…DP, and digit information through 2

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.

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.

Ordering Code:

Connection Diagram

Order Number

Package Number

N28B

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

DS005915.prf

Pin Assignments for DIP

Top View

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

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.

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

clamp input voltages above V

Features

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

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 W (typ.)

Package Description

October 1987

Revised January 1999

www.fairchildsemi.com

Related parts for MM74C911N

MM74C911N Summary of contents

Page 1

... N28B 28-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS 010, 0.600” Wide Connection Diagram © 1999 Fairchild Semiconductor Corporation The digit outputs directly drive the base of the digit transis- 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 ...

Page 2

Truth Tables Input Control Digit CE Address Write Digit Latch Digit Write Digit Latch Digit ...

Page 3

Absolute Maximum Ratings (Note 2) Voltage at Any Pin except Inputs 0. Voltage at Any Input except Digits Operating Temperature Range Storage Temperature Range Power Dissipation (P ) Refer D(MAX) DC Electrical ...

Page 4

AC Electrical Characteristics Symbol Parameter t Chip Enable to Write Enable Set-Up Time CW t Address to Write Enable Set-Up Time AW t Write Enable Width WW ...

Page 5

Switching Time Waveforms Multiplexing Output Waveforms Typical Performance Characteristics Segment outputs if shorted to ground will exceed maximum power dissipation of the device. Applications Segment Output Structure (Continued) Read Data Waveforms Note A: All other digit lines are at a ...

Page 6

Input Protection Segment Expansion Typical Application 6 ...

Page 7

Alpha-Numeric Display Segment Identification 7 www.fairchildsemi.com ...

Page 8

Physical Dimensions inches (millimeters) unless otherwise noted 28-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600” Wide LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL ...

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