August 1998

8-25

MIC10951

Micrel

8

MIC10951

V. F. Bargraph and Numeric Display Controller

Summary Information*—Not Recommended for New Designs

Ordering Information

Part Number

Drive

Temp. Range

Package

MIC10951P-40/

50V

0

°C to +70°C

40-pin P-DIP

MIC10951PE-40/

50V

–40

°C to +85°C

40-pin P-DIP

General Description

The MIC10951 Bargraph and Numeric Display Controller is

an LSI general purpose display controller designed to inter-

face to bargraph and numeric displays (vacuum fluorescent

or LED).

The MIC10951 will drive 16-segment bargraph or 7-segment

plus comma and decimal numeric displays with up to 16

display positions. The controller accepts command and data

input words on a clocked serial input line. Commands control

the on/off duty cycle, starting character position, and number

of characters to display. Encoded data words display bargraph

position (single segment or increasing bar length), numbers,

comma, decimal, and selected upper and lower case letters.

No external drive circuitry is required for displays that operate

on 20mA of drive current up to 50V. A 64

× 16-bit segment

decoder provides character set decoding for the display.

Micrel has received the rights from Rockwell International to

manufacture and market this product and reproduce the

specifications, including references to Rockwell.

Block Diagram

Features

• 16 segment drivers plus decimal point and comma tail

drivers

• 16 digit drivers

• Up to 66kHz data rate

• Direct digit drive of 20mA for up to 50V displays

• Supports vacuum fluorescent or LED displays

• Serial data input for 8-bit display and control data words

• 64

× 16-bit PLA provides segment decoding driving

Any 1 of 16 bargraphs segments

1 to 16 bargraph segments

Ten 7-segment numeric characters (0 through 9)

Comma and decimal

8 upper and lower case 7-segment characters

• Command functions

Duty cycle adjust

Character position select

Number of characters

• 40-pin DIP package

TIMING

AND

CONTROL

6

× 16

DISPLAY

DATA

BUFFER

2

× 16

DECIMAL POINT

COMMA TAIL

BUFFER

64

× 16 PLA

DATA

SCLK

POR

VSS

VDD

A

SEGMENT

DECODER

SEGMENT

DRIVERS

(ANODE)

SGA

SGB

SGC

SGD

SGE

SGF

SGG

SGH

SGI

SGJ

SGK

SGL

SGM

SGN

SGO

SGP

PNT

TAIL

DIGIT DRIVERS

(GRID)

* Contact Micrel for more information.