MIC10941/10939

Micrel

8-24

August 1998

MIC10941/10939

V. F. Alphanumeric and Bargraph Display Controller

Summary Information*—Not Recommended for New Designs

Ordering Information

Part Number

Temperature Range

Package

MIC10941P-50

0

°C to +70°C

24-pin P-DIP

MIC10941PE-50

–40

°C to +85°C

24-pin P-DIP

MIC10939J-50

0

°C to +70°C

44-pin PLCC

MIC10939P-50

0

°C to +70°C

40-pin P-DIP

MIC10939PE-50

–40

°C to +85°C

40-pin P-DIP

General Description

The MIC10941 and MIC10939 Alphanumeric and Bargraph

Display Controller is a two-chip MOS/LSI general purpose

display controller system designed to interface with bargraph

and segmented displays (vacuum fluorescent or LED).

The two-chip set will drive displays with up to 16 segments

(plus decimal point and comma tail) and up to 20 grids

(characters) plus a cursor. The chips can be cascaded to

drive larger displays of 80 characters. Segment decoding for

ASCII characters and bargraph patterns is accomplished

through an internal PLA.

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

• 20-character display driver cascadable to 80 characters

• Direct drive capability for vacuum-fluorescent displays

• 128

× 18 PLA provides segment decoding for ASCII

characters (all caps only) and bargraph patterns

• Serial or parallel data input for 8-bit display and control

characters

• Brightness, refresh rate, and display mode controls

• Separate cursor driver output

• 40-pin DIP or 44-pin PLCC (MIC10939)

• 24-pin DIP package (MIC10941)

INVERSION

LOGIC

8-BIT SHIFT

REGISTER

SEGMENT DRIVERS AND LATCHES

128

× 18 PLA

LEVEL

DETECT

LOGIC

CONTROL

LOGIC

GRID DRIVERS

20

× 8

RAM

HOST

20-CHARACTER 16-SEGMENT ALPHANUMERIC OR BARGRAPH DISPLAY

MIC10941

MIC10939

SG01-SG16

CURSOR

STR00–STR19

SCLK-DIS

DATA-LOAD

LEVEL

DETECT

LOGIC

PNT

TAIL

* Contact Micrel for more information.