Purdy AND1742MST2 User Manual

AND1742MST2

240 x 128 Dots
Intelligent Graphics Display

The AND1742MST2 devices are compact, full dot matrix,
with “white page” appearance, LCD modules that have an on­board LCD controller (RA8835) and display memory (RAM).
The AND1742MST2 can display TEXT information,
numerals, letters and symbols, as well as GRAPHIC
patterns. These devices are suitable for medical and
measurement equipment, point-of-sale terminals, portable
equipment, and marine instrumentation.

Features

• FSTN positive black & white LCD type

• Built-in CCFL backlight

• White backlight color, black frame

• 240 x 128 dot graphic display

• Excellent readability and high-contrast ratio

• Built-in LCD controller (RA8835/RAiO)

• Wide operating temperature range (0° to 50°C)

• 12 O’clock viewing direction

• ISO9001 certified

Dot Matrix Dimensions

119.7

0.51

0.47

0.51

0.47

63.97

Mechanical Characteristics

Item

Outline
Dimensions

180.0 (W) x 110.0 (H) x 15.0 Max (D) mm

Viewing Area 132.0 (W) x 76.0 (H) mm

Dot Size 0.47 (W) x 0.47 (H) mm

Dot Pitch 0.51 (W) x 0.51 (H) mm

Resolution 240 (W) x 128 (H) Dots Matrix –

Duty Ratio 1/128 Duty –

Controller RA8835 / RAiO –

DC/DC Converter Without –

240 x 128 pixels

Specification Unit

Absolute Maximum Ratings

Item

Power Supply for Logic

Power Supply for LCD

Absolute Maximum

Symbol Min Max

- V

V

DD

V

- V

DD

-0.3 7.0 V

SS

0 24.0 V

EE

Input Voltage V1 -0.3

CCFL Driving Voltage

CCFL Input Current

V

FL

I

FL

0 500

– 7.0 mA

Electrical Characteristics (TA = 25°C)

Item

Power
Supply for
Logic

Input
Voltage

Power
Supply
Current for
LCM

Symbol Cond. Min. Typ. Max. Unit

V

-

V

DD

V

V

SS

IL

IH

– 4.5 5.0 5.5 V

L Level 0 – 0.6

H Level 2.2 –

Ta = 0ºC – – –

V

-

DD

V

Bias =

1/12

I

DD

Ta =

O

25ºC

Ta =

50ºC

V

DD

16.7 17.8 18.5

–––

=

– 15.6 18

5.0V

V

-

I

EE

DD

V

EE

– 2.4 –

=

17.8V

CCFL
Starting

V

FLS

–

– 750 – Vrms

Voltage

CCFL Driving
Voltage

V

FLD

– – 360 – Vrms

Unit

V

DD

V

V

rms

V

DD

V

mA

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.

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Tel: [phone] • Fax: [phone] • [e-mail] • www.purdyelectronics.com

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

3/21/07

φ

φ

φ

φ

≤

≤

AND1742MST2

Intelligent Graphics Display

Electrical Characteristics (TA = 25°C) (Continued)

Item

CCFL Driving
Current

Symbol Cond. Min. Typ. Max. Unit

V

=

FLD

450Vrms

I

FLD

f

=

FL

– 5.0 – mA

30kHz

V

=
CCFL Driving
Frequency

f

FL

FLD

450Vrms

f

=

FL

15 30 85 kHz

30kHz

CCFL
Saturation
Time

t

SAT

Ta =
25ºC

–1–minut

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

Item

Symbol Min. Typ. Max. Unit

f(12 o’clock) – 34 –
Viewing Angle
Range
(when Cr ≥ 2)

b(6 o’clock) – 41 –

l(9 o’clock) – 35 –

r(3 o’clock) – 30 –

Rise Time * Tr – 140 –

Fall Time *

Frame
Frequency *

Tf

Frm

– 240 –

–64–

Contrast * Cr – 5.2 –

* Condition: V

DD

- V

= 17.8V, Ta = 25ºC

EE

degree

mS

Hz

–

Connector Pin Assignment

Pin No.

1 RESET

2RD

3

Signal Function

Controller Reset

Data Read

WR

Data Write

4 SEL2 MPU Select

5 SEL1

6CS

MPU Select

Chip Select

7 AO Command Mode Set

8 D0 Data Input/Output (LSB)

9 D1 Data Input/Output

10 D2 Data Input/Output

11 D3 Data Input/Output

12 D4 Data Input/Output

13 D5 Data Input/Output

14 D6 Data Input/Output

15 D7 Data Input/Output (MSB)

16

V

DD

Power Supply (5V)

17 GND Ground

18

19

V

V

EE

Contrast Adjustment Voltage

O

Power Supply for LCD Drive

20 FGND Frame Ground

Environmental Absolute Maximum Ratings

Normal Temperature Wide Temperature

Item

Operating Storage Operating Storage

Min. Max. Min. Max. Min. Max. Min. Max.

Ambient Temperature 0ºC +50ºC -20ºC +70ºC -20ºC +70ºC -30ºC +80ºC

Humidity (without condensation) Note 2,4 Note 3, 5 Note 4,5 Note 4,6

Note 2: Ta

50ºC: 80% RH max. Ta > 50ºC: Absolute humidity must be lower than the humidity of 85% RH at 50ºC.

Note 3: Ta at -20ºC will be < 48 hrs at 70ºC will be < 120 hrs when humidity is higher than 75%.
Note 4: Background color changes slightly depending on ambient temperature. This phenomenon is reversible.
Note 5: Ta

70ºC: 75% RH max. Ta > 70ºC: absolute humidity must be lower than the humidity of 75% RH at 70ºC.

Note 6: Ta at -30ºC will be < 48 hrs, at 80ºC will be <120 hrs when humidity is higher than 75%.

3/21/07

Tel: [phone] • Fax: [phone] • [e-mail] • www.purdyelectronics.com

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

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