MM74C912N Просмотр технического описания (PDF) - Fairchild Semiconductor

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MM74C912N

6-Digit BCD Display Controller/Driver

Fairchild Semiconductor 

Functional Description

Character Font

Segment Identification

The MM74C912 display controller is manufactured using

metal gate CMOS technology. A single 5V 74 series TTL

supply can be used for power and should be bypassed at

the VCC pin.

All inputs are TTL compatible; the segment outputs drive

the LED display directly through current limiting resistors.

The digit outputs are designed to directly drive the base of

a grounded emitter digit transistor without the need of a

Darlington configuration.

As seen in the block diagram, these display controllers

contain six 5-bit registers; any one of which may be ran-

domly written. The internal multiplexer scans the registers

and refreshes the display. This combination of write only

memory and self-scan display makes the display controller

a “refreshing experience” for an over-burdened micropro-

cessor.

Block Diagram

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