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/
MIC10951P-50
50V
0
C to +70
C
40-pin P-DIP
MIC10951PE-40/
MIC10951PE-50
50V
40
C to +85
C
40-pin P-DIP
Dual-marked devices replace both 40V and 50V versions
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)
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
AD16
* Contact Micrel for more information.
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