National Semiconductor COP472-3 Technical data

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COP472-3 Liquid Crystal Display Controller

July 1995

General Description

The COP472 –3 Liquid Crystal Display (LCD) Controller is a peripheral member of the COPS CMOS technology. The COP472-3 drives a multiplexed liquid crystal display directly. Data is loaded serially and is held in internal latches. The COP472-3 contains an on-chip oscillator and generates all the multi-level waveforms for backplanes and segment outputs on a triplex display. One COP472-3 can drive 36 segments multiplexed as3x12 (4(/2 digit display). Two COP472-3 devices can be used together to drive 72 segments (3 x 24) which could be an 8(/2 digit display.

TM

family, fabricated using

Block Diagram

Features

Y

Direct interface to TRIPLEX LCD

Y

Low power dissipation (100 mW typ.)

Y

Low cost

Y

Compatible with all COPS processors

Y

Needs no refresh from processor

Y

On-chip oscillator and latches

Y

Expandable to longer displays

Y

Operates from display voltage

Y

MICROWIRETMcompatible serial I/O

Y

20-pin Dual-In-Line package and 20-pin SO

COPSTMand MICROWIRETMare trademarks of National Semiconductor Corporation.

C

1996 National Semiconductor Corporation RRD-B30M56/Printed in U. S. A.

TL/DD/6932

TL/DD/6932– 1

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Absolute Maximum Ratings

Voltage at CS, DI, SK pins

Voltage at all other Pins

Operating Temperature Range 0§Cto70§C

b

0.3V to V

0.3V toa9.5V

a

0.3V

DD

Storage Temperature

b

65§Ctoa150§C

Lead Temp. (Soldering, 10 Seconds) 300§C

DC Electrical Characteristics

GNDe0V, V

DD

e

3.0V to 5.5V, T

Parameter Conditions Min Max Units

Power Supply Voltage, V

DD

Power Supply Current, IDD(Note 1) V

Input Levels

DI, SK, CS

V

IL

V

IH

BPA (as Osc. in)

V

IL

V

IH

Output Levels, BPC (as Osc. Out)

V

OL

V

OH

Backplane Outputs (BPA, BPB, BPC)

V

BPA, BPB, BPC

V

BPA, BPB, BPC

V

BPA, BPB, BPC

V

BPA, BPB, BPC

Segment Outputs (SA

V

SEG

V

SEG

V

SEG

V

SEG

ON During V OFF BPaTime (/3 V

ON During 0 DV Volts OFF BPbTime )/3 V

E

ON During 0 DV Volts

1

OFF BPaTime )/3 V

ON During V OFF BPbTime (/3 V

Internal Oscillator Frequency 15 80 kHz

Frame Time (Int. Osc.d192) 2.4 12.8 ms

Scan Frequency (1/T

SCAN

SK Clock Frequency 4 250 kHz

SK Width 1.7 ms

DI

Data Setup, t Data Hold, t

SETUP

HOLD

CS

t

SETUP

t

HOLD

Output Loading Capacitance 100 pF

Note 1: Power supply current is measured in stand-alone mode with all outputs open and all inputs at V

Note 2: DVe0.05VDD.

e

0§Cto70§C (depends on display characteristics)

A

3.0 5.5 Volts

e

5.5V 250 mA

DD

e

V

3V 100 mA

DD

0.8 Volts

0.7 V

DD

9.5 Volts

0.6 Volts

b

V

0.6 V

DD

0.4 Volts

b

V

0.4 V

SA

DD

b

DVVDDVolts

DD

b

DV (/3 V

DD

b

DV )/3 V

DD

)

4

b

DV )/3 V

DD

b

DVVDDVolts

DD

b

DV (/3 V

DD

a

DV Volts

DD

a

DV Volts

DD

a

DV Volts

DD

a

DV Volts

DD

) 39 208 Hz

1.0 ms

100 ns

1.0 ms

.

DD

Volts

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Absolute Maximum Ratings

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Voltage at CS, DI, SK Pins

Voltage at All Other Pins

Operating Temperature Range

b

0.3V toa9.5V

b

0.3V to V

b

40§Ctoa85§C

DD

a

0.3V

Storage Temperature

b

65§Ctoa150§C

Lead Temperature

(Soldering, 10 seconds) 300§C

DC Electrical Characteristics

GNDe0V, V

DD

e

3.0V to 5.5V, T

Parameter Conditions Min Max Units

Power Supply Voltage, V

DD

Power Supply Current, IDD(Note 1) V

Input Levels

DI, SK, CS

V

IL

V

IH

BPA (as Osc. In)

V

IL

V

IH

Output Levels, BPC (as Osc. Out)

V

OL

V

OH

Backplane Outputs (BPA, BPB, BPC)

V

BPA, BPB, BPC

V

BPA, BPB, BPC

V

BPA, BPB, BPC

V

BPA, BPB, BPC

Segment Outputs (SA

V

SEG

V

SEG

V

SEG

V

SEG

ON During V OFF BPaTime (/3 V

ON During 0 DV Volts OFF BPbTime )/3 V

E

ON During 0 DV Volts

1

OFF BPaTime )/3 V

ON During V OFF BPbTime (/3 V

Internal Oscillator Frequency 15 80 kHz

Frame Time (Int. Osc.d192) 2.4 12.8 ms

Scan Frequency (1/T

SCAN

SK Clock Frequency 4 250 kHz

SK Width 1.7 ms

DI

Data Setup, t Data Hold, t

SETUP

HOLD

CS

t

SETUP

t

HOLD

Output Loading Capacitance 100 pF

Note 1: Power supply current is measured in stand-alone mode with all outputs open and all inputs at VDD.

Note 2: DV

e

0.05 VDD.

eb

40§Ctoa85§C (depends on display characteristics)

A

3.0 5.5 Volts

e

5.5V 300 mA

DD

e

V

3V 120 mA

DD

0.8 Volts

0.7 V

DD

9.5 Volts

0.6 Volts

b

V

0.6 V

DD

0.4 Volts

b

V

0.4 V

SA

DD

b

DVVDDVolts

DD

b

DV (/3 V

DD

b

DV )/3 V

DD

)

4

b

DV )/3 V

DD

b

DVVDDVolts

DD

b

DV (/3 V

DD

a

DV Volts

DD

a

DV Volts

DD

a

DV Volts

DD

a

DV Volts

DD

) 39 208 Hz

1.0 ms

100 ns

1.0 ms

Volts

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