AND471GST-LED

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## **Features** 

## **• RoHS Compliant** 

- AND471GST: Super Twist Technology 

- AND471GST-LED: STN with LED backlight 

- Low voltage, +5V single power supply 

- Controller on board (HD44780) 

- RoHS compliant 

- Wide temperature range option (WGST) 

## **Dot Matrix Dimensions** 

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4.84 0.50<br>0.92<br>0.05<br>1.10 0.05<br>9.66<br>0.40<br>**----- End of picture text -----**<br>


## **Mechanical Characteristics** 

|**Item**|**Specifcation**|**Unit**|
|---|---|---|
|Outline<br>Dimensions|122 (W) x 44 (H) x 11 (D)|mm|
|Character size|4.84 (W) x 9.66 (H)|mm|
|Viewing Area|99.0 (W) x 24.0 (H)|mm|
|Dot Size|0.92 (W) x 1.10 (H)|mm|
|Dot Pitch|0.98 (W) x 1.16 (H)|mm|



## **Absolute Maximum Ratings** 

|**Item**|**Symbol**|||**Rating**|**Rating**|**Unit**|
|---|---|---|---|---|---|---|
|Supply Voltage|V<br>DD|||7.0||V|
|Input Voltage|V<br>IN|0|<br>≤|V<br>IN<br>≤<br>|V<br>DD|V|
|LED Forward Current|I<br>F|||480||mA|



## **AND471GST/GST-LED 2 Lines x 16 Characters Intelligent Character Display** 

The AND471GST/GST-LED devices are compact, LCD modules that have an on-board LCD controller and driver circuit. These devices can display 160 characters (numerals, letters, symbols and Kana letters), as well as eight custom characters. The large characters provide excellen readability. 

## **Absolute Maximum Ratings (Continued)** 

|**Item**|**Symbol**|**Rating**|**Unit**|
|---|---|---|---|
|LED Reverse Voltage|V<br>R|8|V|
|LED Power Dissipation|P<br>D|2000|mW|
|Operating Temperature|T<br>op|0 to +50|°C|
|Storage Temperature|T<br>stg|–20 to +60|˚C|



## **Electrical Characteristics (TA = 25°C)** 

|**Item**|**Symbol**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|
||V<br>DD|4.75|5.0|5.25||
|Supply Voltage|V<br>DD<br>-V<br>O|3.0|–|6.3|V|
|High Level In Voltage<br>(V<br>DD<br>= 5.0V)|V<br>IH|2.2|–|–|V|
|Low Level In Voltage<br>(I<br>OH<br>= 0.2 mA)|V<br>IL|–|–|0.6|V|
|High Level Output Volt.<br>(–I<br>OH<br>= 0.2 mA)|V<br>OH|2.4|–|–|V|
|Low Level Output Volt.<br>(I<br>OL<br>= 1.2 mA)|V<br>OL|–|–|0.4|V|
|LED Forward Voltage<br>(I<br>F<br>= 220)|V<br>F|3.8|4.1|4.4|V|
|LED Reverse Current<br>(V<br>R<br>= 8 V)|I<br>R|–|–|2.4|mA|



## **Optical Characteristics (TA 5 = 25˚C,** φ **= 0°,** θ **= 0°)** 

|**Item**|**Symbol**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|
|Viewing Angle|φ|–|50|–|degree|
|Contrast|K|–|6.0|–|–|
|Turn On|T<br>on|–|200|400|ms|
|Turn Off|T<br>off|–|250|400|ms|



Product specifications contained herein may be changed without prior notice. It is therefore advisable to contact Purdy Electronics before proceeding with the design of equipment incorporating this product. 

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085 Tel: 408.523.8200 • Fax: 408.733.1287 •sales@purdyelectronics.com • www.purdyelectronics.com 

7/20/07 

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**AND471GST/GST-LED Intelligent Character Display** 

## **Connector Pin Assignment** 

ee **Pin No. Signal Function** ee 1 GND Ground 2 VDD +5 Power Supply 3 VO LCD Drive Voltage “H” Data Input 4 RS “L” Command Input 5 R/W Read/Write 6 E Enable ee eeee Pf 7 DBO 8 DB1 **|** 9 DB2 Pf Data Bus 10 DB3 I DB0-DB7 are for 8-bit operation 11 DB4 Pf DB4-DB7 are for 4-bit operation 12 DB5 **|** 13 DB6 Pf 14 DB7 | | 

## **Power Supply** 

The LCD panel is driven by the voltage VDD–VO, so you need an adjustable VO for contrast control and temperature compensation. 

## **Temperature Variations** 

|**Temperature Variations**|||
|---|---|---|
|**Temperature**<br>0°C|**V**|**DD**<br>**–V**<br>**O**<br>5.00|
|+25°C||4.75|
|+50°C||4.50|



## **Power Supply Block Diagram** 

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VDD (+5V)<br>VDD – VO<br>|<br>VO VR VDD<br>GND<br>= VDD – VO = LCD Drive Voltage<br>VR10 to 20 kΩ<br>**----- End of picture text -----**<br>


## **Block Diagram** 

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|<br>E<br>R/W _ — — 16 LCD |<br>= ee<br> RS<br>DB0-DB7 Driver<br>40<br>40<br>VDD ® Controller/O 1 |<br>VO —__l , 1 Driver |<br>GND<br>t | ae<br>**----- End of picture text -----**<br>


## **Dimensional Outline** 

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085 7/20/07 Tel: 408.523.8200 • Fax: 408.733.1287 • sales@purdyelectronics.com • www.purdyelectronics.com 

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