intersil ICM7243 DATA SHEET

®

ICM7243

Data Sheet FN3162.3October 28, 2005

8-Character, Microprocessor­Compatible, LED Display Decoder Driver

The ICM7243 is an 8-character, alphanumeric display driver
and controller which provides all the circuitry required to
interface a microprocessor or digital system to a 14-segment
or 16-segment display. It is primarily intended for use in
microprocessor systems, where it minimizes hardware and
software overhead. Incorporated on-chip are a 64-character
ASClI decoder, 8 x 6 memory, high power character and
segment drivers, and the multiplex scan circuitry.

6-bit ASCll data to be displayed is written into the memory
directly from the microprocessor data bus. Data location
depends upon the selection of either Sequential
(MODE = 1) or Random access mode (MODE = 0). In the
Sequential Access mode the first entry is stored in the
lowest location and displayed in the “left-most” character
position. Each subsequent entry is automatically stored in
the next higher location and displayed to the immediate
“right” of the previous entry. A DISPlay FULL signal is
provided after 8 entries; this signal can be used for
cascading devices together. A CLeaR
clear the memory and reset the location counter. The
Random Access mode allows the processor to select the
memory address and display digit for each input word.

pin is provided to

Features

• 14-Segment and 16-Segment Fonts with Decimal Point

• Mask Programmable for Other Font-Sets Up to 64
Characters

• Microprocessor Compatible

• Directly Drives LED Common Cathode Displays

• Cascadable Without Additional Hardware

• Standby Feature Turns Display Off; Puts Chip in Low
Power Mode

• Sequential Entry or Random Entry of Data Into Display

• Single +5V Operation

• Character and Segment Drivers, All MUX Scan Circuitry, 8
x 6 Static Memory and 64-Character ASCll Font Generator
Included On-Chip

• Pb-Free Plus Anneal Available (RoHS Compliant)

The character multiplex scan runs whenever data is not
being entered. It scans the memory and CHARacter drivers,
and ensures that the decoding from memory to display is
done in the proper sequence. Intercharacter blanking is
provided to avoid display ghosting.

Ordering Information

PART NUMBER

ICM7243BlPL ICM7243BlPL -25°C to 85°C 40 Ld PDIP E40.6

ICM7243BlPLZ (See Note) ICM7243BlPLZ -25°C to 85°C 40 Ld PDIP (Pb-free) E40.6

ICM7243AIM44Z (See Note) ICM7243AIM44Z -25°C to 85°C 44 Ld MQFP (Pb-free) Q44.10x10

ICM7243AIM44ZT (See Note) ICM7243AIM44Z -25°C to 85°C 44 Ld MQFP (Tape and Reel)

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

PART MARKING

TEMP. RANGE (°C) PACKAGE PKG. DWG. #

Q44.10x10

(Pb-free)

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

Copyright Intersil Americas Inc. 2003, 2005. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

Pinouts

ICM7243ICM7243

ICM7243B (14-SEGMENT CHARACTER)

(PDIP, CERDIP)

TOP VIEW

1

V

DD

SEG e

SEG g1

SEG k
SEG c
SEG d
SEG a

D0
D1
D2
D3
D4
D5
CS
CS
CS

WR
CHAR 8
CHAR 7
CHAR 6

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

m

SEG
SEG l
SEG g2
SEG b
SEG i
SEG f
DP

h

SEG
SEG j
MODE
A0/SEN
A1/CLR
A2/DISP FULL
OSC/OFF
CHAR 1
CHAR 2
CHAR 3
CHAR 4
V

SS

CHAR 5

SEG d1
SEG a1
SEG

a2

D0

D1

D2

D3

D4

D5

CS

NC

ICM7243A (16-SEGMENT CHARACTER)

(MQFP)

TOP VIEW

DD

V

SEG l

SEG g2

SEG b

SEG i

CHAR3

CHAR2

SEG f

33

32

31

30

29

28

27

26

25

24

23

2221201918

NC

SEG c

SEG k

SEG g1

SEG e

44 43 42 41 40

1

2

3

4

5

6

7

8

9

10

11

12 13 14 15 16 17

NC

WR

CHAR8

CHAR7

SEG m

39 38 37 36 35 34

SS

V

CHAR6

CHAR5

CHAR4

SEG d2

DP

SEG h
SEG j

MODE

A0/SEN
A1/CLR
A2/DISP FULL
OSC/OFF

CHAR1

NC

2

FN3162.3

October 28, 2005

Functional Block Diagram

ICM7243ICM7243

(NOTE 1)

MODE

A0/SEN

A1/CLR

A2/DISP FULL

DATA INPUT

D0 - D5

WR

CS

CS
CS

CL

D

SEL

MUX

DATA

D

LATCHES

CL

CL

D

ADDRESS

LATCHES

CL

D

CONTROL

LATCH

Q

Q

8 x 6

D1

DATA

MEMORY

CLR

CL

ADR

ONE

SHOT

CL

EN

SEQUENTIAL

SEQUENTIAL

ADDRESS

COUNTER

CLR

OVERFLOW

D0

8

3

3

ROM

(NOTE 1)

SEL

ADDRESS

MULITPLEXER

MULTIPLEXER

AND

DECODER

64 x 17

6

17

(NOTE 1)

8

SEGMENT

DRIVERS

8

CHARACTER

CHARACTER

DRIVERS

SEGMENT
OUTPUTS
SEG x

CHAR N
CHARACTER
OUTPUTS

OSC/OFF

NOTE:

1. ICM7243A has only one CS and no CS
ICM7243B has 15 Segments.

OSCILLATOR

MULTIPLEX

OSCILLATOR

.

CHARACTER

MULTIPLEX

COUNTER

3

INTER-CHARACTER BLANKING

3

FN3162.3

October 28, 2005

ICM7243ICM7243

Absolute Maximu m Ratings Thermal Information

Supply Voltage VDD - VSS. . . . . . . . . . . . . . . . . . . . . . . . . . . . +6.0V

Input Voltage (Any Terminal). . . . . . . . . . . V

CHARacter Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . 300mA

+0.3V to VSS -0.3V

DD

SEGment Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA

Operating Conditions

Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . .-25°C to 85°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θ

is measured with the component mounted on an evaluation PC board in free air.

JA

Thermal Resistance (Typical, Note 1) θ

(°C/W) θJC (°C/W)

JA

PDIP Package . . . . . . . . . . . . . . . . . . . 50 N/A

MQFP Package . . . . . . . . . . . . . . . . . . 70 N/A

Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C

Maximum Storage Temperature Range . . . . . . . . . .-65°C to 150°C

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C

(MQFP - Lead Tips Only)

Electrical Specifications V

= 5V, VSS = 0V, TA = 25°C, Unless Otherwise Specified

DD

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

DC CHARACTERISTICS

Supply Voltage (V

Operating Supply Current, I

Quiescent Supply Current, I

Input High Voltage, V

Input Low Voltage, V

Input Current, I

CHARacter Drive Current, I

CHARacter Leakage Current, I

SEGment Drive Current, I

SEGment Leakage Current, I

DISPlay FULL Output Low, V

DISPlay FULL Output High, V

Display Scan Rate, f

IN

- VSS), V

DD

IH

IL

DS

DD

CHAR

SEG

SUPP

STBY

CHLK

SLK

OL

OH

V

= 5.25V, 10 Segments ON, All 8 Characters - 180 - mA

SUPP

V

= 5.25V, OSC/OFF Pin < 0.5V, CS = V

SUPP

V

SUPP

V

SUPP

= 5V, V

= 5V, V

= 1V 140 190 - mA

OUT

= 2.5V 14 19 - mA

OUT

SS

IOL = 1.6mA - - 0.4 V

lIH = 100µA2.4--V

Electrical Specifications Drive levels 0.4V and 2.4V, timing measured at 0.8V and 2.0V. V

Unless Otherwise Specified

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

AC CHARACTERISTICS

WR

, CLeaR Pulse Width Low, t

WR

, CLeaR Pulse Width High (Note 1), t

Data Hold Time, t

Data Setup Time, t

Address Hold Time, t

Address Setup Time, t

CS, CS

Setup Time, t

DH

DS

AH

AS

CS

Pulse Transition Time, t

SEN Setup Time, t

Display Full Delay, t

SEN

WDF

WPI

WPH

T

4.75 5.0 5.25 V

- 30 250 µA

2- -V

--0.8V

-10 - +10 µA

- - 100 µA

-0.0110µA

- 400 - Hz

= 5V, TA = 25°C,

DD

300 250 - ns

- 250 - ns

0 -100 - ns

250 150 - ns

125 - - ns

40 15 - ns

0--ns

--100ns

0-25- ns

700 480 - ns

Capacitance

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

Input Capacitance, C

Output Capacitance, C

NOTES:

1. In Sequential mode WR

2. For design reference only, not tested.

lN

O

high must be ≥ T

4

(Note 2) - 5 - pF

(Note 2) - 5 - pF

+T

WDF

.

SEN

FN3162.3

October 28, 2005

Timing Waveforms

CS

CS

ADDRESS

WRITE

DATA

ICM7243ICM7243

t

CS

t

AH

t

AS

VAL ID

t

WC

t

WPI

t

t

T

DS

VAL ID

FIGURE 1. RANDOM ACCESS TIMING

t

DH

t

t

T

WHP

WR

CLEAR

SEN

DISPLAY FULL

INTERNAL

INTER-CHARACTER

BLANKING

SIGNAL

CHAR 1

CHAR 2

CHAR 3

CHAR

12

t

SEN

CHAR

CHAR

FIGURE 2. SEQUENTIAL ACCESS MODE TIMING (MODE = 1)

~5µs

~300µs

8

t

WPH

t

WDF

CHARACTERS

DRIVE

SIGNALS

CHAR 4

CHAR 5

CHAR 6

CHAR 7

CHAR 8

FIGURE 3. DISPLAY CHARACTERS MULTIPLEX TIMING DIAGRAM

5

INTER-CHARACTER BLANKING

FN3162.3

October 28, 2005