Intersil Corporation ICM7228 Datasheet

August 1997

ICM7228

8-Digit, Microprocessor-

Compatible, LED Display Decoder Driver

Features

• Improved 2nd Source to Maxim ICM7218

• Fast Write Access Time of 200ns

• Multiple Microprocessor Compatible Versions

• Hexadecimal, Code B and No Decode Modes

• Individual Segment Control with “No Decode” Feature

• Digit and Segment Drivers On-Chip

• Non-Overlapping Digits Drive

• Common Anode and Common Cathode LED Versions

• Low Power CMOS Architecture

• Single 5V Supply

Applications

• Instrumentation

• Test Equipment

• Hand Held Instruments

• Bargraph Displays

• Numeric and Non-Numeric Panel Displays

• High and Low Temperature Environments where LCD
Display Integrity is Compromised

Ordering Information

Description

The Intersil ICM7228 display driver interfaces microproces­sors to an 8-digit, 7-segment, numeric LED display. Included
on chip are two types of 7-segment decoder, multiplex scan
circuitry, LED display segment drivers, LED display digit
drivers and an 8-byte static memory as display RAM.

Data can be written to the ICM7228A and ICM7228B’s display
RAM in sequential 8-digit update or in single-digit update for­mat. Data is written to the ICM7228C and ICM7228D display
RAM in parallel random access format. The ICM7228A and
ICM7228C drive common anode displays. The ICM7228B and
ICM7228D drive common cathode displays. All versions can
display the RAM data as either Hexadecimal or Code B format.
The ICM7228A and ICM7228B incorporate a No Decode mode
allowing each bit of each digit's RAM word to drive individual
display segments resulting in independent control of all display
segments. As a result, bargraph and other irregular display
segments and formats can be driven directly by this chip.

The Intersil ICM7228 is an alternative to both the Maxim
ICM7218 and the Intersil ICM7218 display drivers. Notice that
the ICM7228A/B has an additional single digit access mode.
This could make the Intersil ICM7218A/B softwareincompatible
with ICM7228A/B operation.

PART NUMBER DATA ENTRY PROTOCOL DISPLAY TYPE TEMP. RANGE (oC) PACKAGE PKG. NO.

ICM7228AIPI Sequential Common Anode -40 to 85 28 Ld PDIP E28.6
ICM7228BIPI Sequential Common Cathode -40 to 85 28 Ld PDIP E28.6
ICM7228CIPI Random Common Anode -40 to 85 28 Ld PDIP E28.6
ICM7228DIPI Random Common Cathode -40 to 85 28 Ld PDIP E28.6
ICM7228AIJI Sequential Common Anode -40 to 85 28 Ld CERDIP F28.6
ICM7228BIJI Sequential Common Cathode -40 to 85 28 Ld CERDIP F28.6
ICM7228CIJI Random Common Anode -40 to 85 28 Ld CERDIP F28.6
ICM7228DIJI Random Common Cathode -40 to 85 28 Ld CERDIP F28.6
ICM7228AIBI Sequential Common Anode -40 to 85 28 Ld SOIC M28.3
ICM7228BIBI Sequential Common Cathode -40 to 85 28 Ld SOlC M28.3
ICM7228CIBI Random Common Anode -40 to 85 28 Ld SOlC M28.3
ICM7228DIBI Random Common Cathode -40 to 85 28 Ld SOlC M28.3
ICM7228AMJI883B Sequential Common Anode -55 to 125 28 Ld CERDIP F28.6
ICM7228BMJI883B Sequential Common Cathode -55 to 125 28 Ld CERDIP F28.6
ICM7228CMJI883B Random Common Anode -55 to 125 28 Ld CERDIP F28.6
ICM7228DMJI883B Random Common Cathode -55 to 125 28 Ld CERDIP F28.6

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207

| Copyright © Intersil Corporation 1999

9-17

File Number 3160.1

Pinouts

ICM7228A

(CERDIP, PDIP, SOIC)

COMMON ANODE

TOP VIEW

ICM7228

ICM7228B

(CERDIP, PDIP, SOIC)

COMMON CATHODE

TOP VIEW

SEG c
SEG e
SEG b

DP

ID6 (HEXA/CODE B)

DECODE)

ID5 (

ID7 (DATA COMING)

WRITE

MODE

SHUTDOWN)

ID4 (

ID1
ID0
ID2
ID3

1
2
3
4
5
6
7
8

9
10
11
12
13
14

ICM7228C

(CERDIP, PDIP, SOIC)

COMMON ANODE

TOP VIEW

28
27
26
25
24
23
22
21
20
19
18
17
16
15

V

SS

SEG
SEG g
SEG d
SEG f
DIGIT 3
DIGIT 6
DIGIT 7
DIGIT 4
V

DD

DIGIT 8
DIGIT 5
DIGIT 2
DIGIT 1

28
27
26
25
24
23
22
21
20
19
18
17
16
15

V

SS

DIGIT 7
DIGIT 5
DIGIT 2
DIGIT 8
SEG
SEG
SEG e
SEG c
V

DD

SEG d
SEG b
SEG a
DP

g
f

DIGIT 4

a

ID6 (HEXA/

ID7 (DATA COMING)

ID4 (

DIGIT 6
DIGIT 3
DIGIT 1

CODE B)

DECODE)

ID5 (

SHUTDOWN)

WRITE

MODE

ID1
ID0
ID2
ID3

1
2
3
4
5
6
7
8

9
10
11
12
13
14

ICM7228D

(CERDIP, PDIP, SOIC)

COMMON CATHODE

TOP VIEW

DA0 (DIGIT ADDRESS 0)
DA1 (DIGIT ADDRESS 1)

ID7 (INPUT

HEXA/CODE B/

DA2 (DIGIT ADDRESS 2)

SHUTDOWN

SEG c
SEG e
SEG b

DP

DP)

WRITE

ID1
ID0
ID2
ID3

28
27
26
25
24
23
22
21
20
19
18
17
16
15

V

SS

SEG
SEG g
SEG d
SEG f
DIGIT 3
DIGIT 6
DIGIT 7
DIGIT 4
V

DD

DIGIT 8
DIGIT 5
DIGIT 2
DIGIT 1

DIGIT 4

a

DA0 (DIGIT ADDRESS 0)
DA1 (DIGIT ADDRESS 1)

HEXA/CODE B/

DA2 (DIGIT ADDRESS 2)

DIGIT 6
DIGIT 3
DIGIT 1

ID7 (INPUT

SHUTDOWN

DP)

WRITE

ID1
ID0
ID2
ID3

1
2
3
4
5
6
7
8

9
10
11
12
13
14

1
2
3
4
5
6
7
8

9
10
11
12
13
14

28
27
26
25
24
23
22
21
20
19
18
17
16
15

V

SS

DIGIT 7
DIGIT 5
DIGIT 2
DIGIT 8
SEG
SEG
SEG e
SEG c
V

DD

SEG d
SEG b
SEG a
DP

g
f

9-18

Functional Block Diagram

ICM7228

ICM7228A, ICM7228B

ID0 - ID7

INPUT

DAT A

8

DECODE

HEXA/CODE B

8-BYTE

1

1

STATIC

RAM

7

4

HEXADECIMAL/

CODE B

DECODER

7

8

ID4 - ID7

CONTROL

INPUTS MODE

4

CONTROL

LOGIC

8

8

8

7

1

WRITE

1 1

1

WRITE ADDRESS

COUNTER

1

READ

ADDRESS, DIGIT

MULTIPLEXER

3

MULTIPLEX

OSCILLATOR

SHUTDOWN

1

1

HEXADECIMAL/

SHUTDOWN

THREE LEVEL

INPUT LOGIC

8-BYTE
STATIC

RAM

4

HEXADECIMAL/

CODE B

DECODER

ICM7228C, ICM7228D

CODE B/

1

ID0 - ID3

ID7

DATA INPUT

5 1

1

8

8

1

DA0 - DA2
ADDRESS

WRITE

WRITE ADDRESS

COUNTER

8

READ

ADDRESS

MULTIPLEXER

5

MULTIPLEX

OSCILLATOR

DIGIT

3

SHUTDOWN

DECODE

NO-DECODE

7

8 SEGMENT

DRIVERS

DECIMAL
POINT

18

8 DIGIT

DRIVERS

INTERDIGIT
BLANKING

7

8 SEGMENT

DRIVERS

DECIMAL
POINT

18

INTERDIGIT
BLANKING

8 DIGIT

DRIVERS

9-19

ICM7228

Absolute Maximum Ratings Thermal Information

Supply Voltage (VDD - VSS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V

Digit Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500mA

Segment Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . .100mA

Input Voltage (Note 1) (An y Terminal). . .(VSS-0.3V)<VIN<(VDD+0.3V)

Operating Conditions

Operating Temperature Range

IPI, IJI, IBI Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC

MJl Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC

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.

NOTES:

1. Due to the SCR structure inherent in the CMOS process used to fabricate these devices, connecting any terminal to a voltage greater
than VDD or less then VSS may cause destructive device latchup . For this reason, it is recommended that no inputs ro w sources operating
on a different power supply be applied to the device before its own supply is established, and when using multiple supply systems the
supply to the ICM7228 should be turned on first.

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

Thermal Resistance (Typical, Note 2) θJA (oC/W) θJC (oC/W)

CERDIP Package . . . . . . . . . . . . . . . . 55 12

PDIP Package. . . . . . . . . . . . . . . . . . . 60 N/A

SOIC Package. . . . . . . . . . . . . . . . . . . 75 N/A

Maximum Junction Temperature

IPI, IBI Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150oC

MJI, IJI Suffix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175oC

Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC

(SOIC - Lead Tips Only)

Electrical Specifications V

= +5.0V ±10%, VSS = 0V, Unless Otherwise Specified

DD

INDUSTRIAL TEMPERATURE RANGE, IPI, IJI, LBI DEVICES

PARAMETER TEST CONDITIONS

Supply Voltage Range, V

SUPPLY

Operating 4 - 6 4 - 6 V
Power Down Mode 2 - - 2 - -

Quiescent Supply Current, I

Q

Shutdown, ICM7228A, IMC7228B - 1 100 - 1 100 µA
Shutdown, 7228C, 7228D - 2.5 100 - 2.5 100

Operating Supply Current, I

DD

Common Anode, ICM7228A/C
Segments = ON; Outputs = OPEN

Common Anode, ICM7228A/C
Segments = OFF; Outputs = OPEN

Common Cathode, ICM7228B/D
Segments = ON; Outputs = OPEN

Common Cathode, ICM7228B/D
Segments = OFF; Outputs = OPEN

Digit Drive Current, I

DIG

Common Anode, ICM7228A/C
V

= VDD - 2.0V

OUT

Common Cathode, ICM7228B/D

= VSS + 1.0V

V

OUT

Digit Leakage Current, I

DLK

Shutdown Mode, V

OUT

Common Anode, ICM7228A/C
Shutdown Mode, V

OUT

Common Cathode, 7228B/D

Peak Segment Drive Current, I

Common Anode, ICM7228A/C

SEG

V

= VSS + 1.0V

OUT

Common Cathode, 7228B/D
V

= VDD - 2.0V

OUT

Segment Leakage Current, I

SLK

Shutdown Mode, V

OUT

Common Anode, ICM7228A/C
Shutdown Mode, V

OUT

Common Cathode, ICM7228B/D

Input Leakage Current, I

IL

All Inputs Except Pin 9
ICM7228C, ICM7228D VIN = V

All Inputs Except Pin 9
ICM7228C, ICM7228D V

= 2.0V

= 5.0V

= V

DD

= V

SS

= 5.0V

IN

SS

T

= 25oC -40oC TO 85oC

A

UNITSMIN TYP MAX MIN TYP MAX

- 200 450 - 200 450 µA

- 100 450 - 100 450

- 250 450 - 250 450

- 175 450 - 175 450

200 - - 175 - - mA

50 - - 40 - -

- 1 100 - 1 100 µA

- 1 100 - 1 100

20 25 - 20 - - mA

10 12 - 10 - -

-150-150µA

-150-150

--1--1µA

---1---1

9-20

ICM7228

Electrical Specifications V

= +5.0V ±10%, VSS = 0V, Unless Otherwise Specified

DD

INDUSTRIAL TEMPERATURE RANGE, IPI, IJI, LBI DEVICES (Continued)

PARAMETER TEST CONDITIONS

Display Scan Rate, f

MUX

Inter-Digit Blanking Time, t
Logical “1” Input Voltage, V

IDB

INH

Per Digit - 390 - - 390 - Hz

Three Level Input: Pin 9
ICM7228C, ICM7228D Hexadecimal
VDD = 5V

Floating Input, V

INF

Three Level Input: Pin 9
ICM7228C, ICM7228D Code B
VDD = 5V

Logical “0” Input Voltage, V

INL

Three Level Input: Pin 9
ICM7228C, ICM7228D Shutdown
VDD = 5V

Three Level Input Impedance, Z

INVCC

= 5V

Pin 9 of ICM7228C and ICM7228D

Logical “1” Input Voltage, V

IH

All Inputs Except
Pin 9 of ICM7228C, ICM7228D
VDD = 5V

Logical “0” Input Voltage, V

IL

All Inputs Except
Pin 9 of ICM7228C, ICM7228D

VDD = 5V
SWITCHING SPECIFICATIONS V
Write Pulsewidth (Low), t
Write Pulsewidth (High), t
Mode Hold Time, t
Mode Setup Time, t
Data Setup Time, t
Data Hold Time, t
Digit Address Setup Time, t
Digit Address Hold Time, t

WL

WH

MH

MS

DS

DH

AS

AH

= +5.0V ±10%, VSS = 0V, VIL = +0.4V, VIH = +2.4V

DD

ICM7228A, ICM7228B 0 -65 - 0 - - ns

ICM7228A, ICM7228B 250 150 - 250 - - ns

ICM7228C, ICM7228D 250 110 - 250 - - ns

ICM7228C, ICM7228D 0 -60 - 0 - - ns

T

= 25oC -40oC TO 85oC

A

UNITSMIN TYP MAX MIN TYP MAX

210- 2 - - µs

4.2 - - 4.2 - - V

2.0 - 3.0 2.0 - 3.0 V

- - 0.8 - - 0.8 V

50 - - 50 - - kΩ

2.0 - - 2.0 - - V

- - 0.8 - - 0.8 V

200 100 - 250 - - ns
850 540 - 1200 - - ns

250 160 - 250 - - ns

0 -60 - 0 - - ns

Electrical Specifications V

= +5.0V ±10%, VSS = 0V, Unless Otherwise Specified

DD

MILITARY TEMPERATURE RANGE, MJI, DEVICES

PARAMETER TEST CONDITIONS

Supply Voltage Range, V

SUPPLY

Operating 4 - 6 4 - 6 V

Power Down Mode 2 - - 2 - - V
Quiescent Supply Current, I

Q

Shutdown, ICM7228A, IMC7228B - 1 100 - 1 100 µA

Shutdown, 7228C, 7228D - 2.5 100 - 2.5 100 µA
Operating Supply Current, I

DD

Common Anode, ICM7228A/C

Segments = ON; Outputs = OPEN

Common Anode, ICM7228A/C

Segments = OFF; Outputs = OPEN

Common Cathode, ICM7228B/D

Segments = ON; Outputs = OPEN

Common Cathode, ICM7228B/D

Segments = OFF; Outputs = OPEN

9-21

= 25oC -55oC TO 125oC

T

A

UNITSMIN TYP MAX MIN TYP MAX

- 200 450 - 200 550 µA

- 100 450 - 100 450 µA

- 250 450 - 250 550 µA

- 175 450 - 175 450 µA

ICM7228

Electrical Specifications V

= +5.0V ±10%, VSS = 0V, Unless Otherwise Specified

DD

MILITARY TEMPERATURE RANGE, MJI, DEVICES (Continued)

PARAMETER TEST CONDITIONS

Digit Drive Current, I

DIG

Digit Leakage Current, I

DLK

Common Anode, VDD = 5V

V

= VDD - 2.0V

OUT

OUT

DD

= 2.0V

= 5V

Common Cathode, V

V

= VSS + 1.0V

OUT

Shutdown Mode, V

Common Anode, ICM7228A/C

Shutdown Mode, V

OUT

= 5.0V

Common Cathode, 7228B/D
Peak Segment Drive Current, I

Common Anode, ICM7228A/C

SEG

V

= VSS + 1.0V, VDD = 5V

OUT

Common Cathode, 7228B/D

= VDD - 2.0V, VDD = 5V

V

OUT

Segment Leakage Current, I

SLK

Shutdown Mode, V

OUT

= V

Common Anode, ICM7228A/C

Shutdown Mode, V

OUT

= V

Common Cathode, ICM7228B/D
Input Leakage Current, I

IL

All Inputs Except Pin 9

ICM7228C, ICM7228D VIN = V

All Inputs Except Pin 9

= 5.0V

IN

Display Scan Rate, f

MUX

Inter-Digit Blanking Time, t
Logical “1” Input Voltage, V

IDB

INH

ICM7228C, ICM7228D V

Per Digit - 390 - - 390 Hz

Three Level Input: Pin 9

ICM7228C, ICM7228D Hexadecimal

VDD = 5V
Floating Input, V

INF

Three Level Input: Pin 9

ICM7228C, ICM7228D Code B

VDD = 5V
Logical “0” Input Voltage, V

INL

Three Level Input: Pin 9

ICM7228C, ICM7228D Shutdown

VDD = 5V
Three Level Input Impedance, Z

INVCC

= 5V

Pin 9 of ICM7228C and ICM7228D
Logical “1” Input Voltage, V

IH

All Inputs Except

Pin 9 of ICM7228C, ICM7228D

VDD = 5V
Logical “0” Input Voltage, V

IL

All Inputs Except

Pin 9 of ICM7228C, ICM7228D

VDD = 5V
SWITCHING SPECIFICATIONS V
Write Pulsewidth (Low), t
Write Pulsewidth (High), t
Mode Hold Time, t
Mode Setup Time, t
Data Setup Time, t
Data Hold Time, t
Digit Address Setup Time, t
Digit Address Hold Time, t

WL

WH

MH

MS

DS

DH

AS

AH

= +5.0V ±10%, VSS = 0V, VIL = +0.4V, VIH = +2.4V

DD

ICM7228A, ICM7228B 0 -65 - 0 -65 - ns

ICM7228A, ICM7228B 250 150 - 250 165 - ns

ICM7228C, ICM7228D 250 110 - 250 100 - ns

ICM7228C, ICM7228D 0 -60 - 0 -60 - ns

DD

SS

SS

T

= 25oC -55oC TO 125oC

A

UNITSMIN TYP MAX MIN TYP MAX

200 - - 170 - - mA

50 - - 35 - - mA

- 1 100 - 1 100 µA

- 1 100 - 1 100 µA

20 25 - 20 25 - mA

10 12 - 10 12 - mA

-150-150µA

-150-150µA

--1--1µA

---1---1µA

210- 210 µs

4.2 - - 4.2 - V

2.0 - 3.0 2.4 - 3.0 V

- - 0.8 - - 0.4 V

50 - - 50 - - kΩ

2.0 - - 2.0 - - V

- - 0.8 - - 0.8 V

200 100 - 250 115 - ns
850 540 - 1200 840 - ns

250 160 - 250 160 - ns

0 -60 - 0 -60 - ns

9-22