Purdy AND1781FST User Manual

Displays

AND1781FST-LED

Intelligent Character Display

AND1781FST-LED

Intelligent Character Display

The AND1781FST-LED is an FSTN, Transflective, Positive, Normal Tem­perature liquid crystal display. It has a transflective rear polarizer, white LED
backlight, 6 o-clock viewing direction.

Features

• FSTN, Transflective, Positive, Extended Temperature

• 240 x 64 Dots

• White LED Backlight

• 6 O’clock Viewing Direction

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.

Mechanical Characteristics

Item Standard Value Unit

Number of Characters 240 x 64 dots

Outline Dimensions 180.0 (W) * 65.0 (H) * 12.3 (D) max mm

Viewing Area 133.0 x 39.0 mm

Active Area 127.16 x 33.88 mm

Dot Size 0.49 x 0.49 mm

Dot Pitch 0.53 x 0.53 mm

LCD Type FSTN, Positive, Transflective

Duty 1/64

View Direction 6 o’clock

Backlight Type LED, White

.

• Normal Temperature Range

• LCD Module 1/64 Duty

• ROHS Compliant

Absolute Maximum Ratings

Item Symbol Min. Max. Unit

Operating Temperature TOP -20 70 ºC

Storage Temperature TST -30 +80 ºC

Input Voltage V1 VSS VDD V

Supply Voltage VDD-VSS -0.3 +7 V

Supply Voltage for LCD VDD-V0 0 15 V

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Displays

Electrical Characteristics

Item Symbol Condition Min. Typ. Max. Unit

Supply Voltage for Logic VDD-VSS – 4.75 5.0 5.25 V

Supply Voltage for LCD VDD-V0

Input High Voltage VIH — VDD-2.2 — VDD V

Input Low Voltage VIL — 0 — 0.8 V

Output High Voltage VOH — VDD-0.3 — VDD V

Output Low Voltage VOL — 0 — 0.3 V

Supply Current IDD VDD=5V 12 16 20 mA

Optical Specifications

Item Symbol Condition Min. Typ. Max. Degree

Viewing Angle Range (V) θ Cr ≥ 2 30 — 60 degree

Contrast Ratio CR — 5 —

Response Time T rise — 200 300 ms

AND1781FST-LED

Intelligent Character Display

Ta = -20ºC — — 13.9 V

Ta = 25ºC 12.1 12.5 12.9 V

Ta = +70ºC 10.1 — — V

(H) ψ -45 — 45 degree

T fall — 200 300 ms

Interface Pin Assignment

Pin No. Pin Out Function Description Level Pin No Pin Out Function Description Level

1 FG Frame Ground (Connected to bezel) — 11 DB0 Data Bus Line H/L

2 VSS Ground — 12 DB1 Data Bus Line H/L

3 VDD Power Supply — 13 DB2 Data Bus Line H/L

4 V0 Power Supply for LCD Driver — 14 DB3 Data Bus Line H/L

5 WR Data write. Write data into T6963 when

WR=L

6 RD Data read. Read data from T6963 when

RD=L

7 CE L: Chip Enable L 17 DB6 Data Bus Line H/L

8 C/D Wr = “l”, C/D = “H”: Command Write; WR =

“L”, C/D = “L:”: Data Write; RD = “L”, C/D =
“H”: Status Read; RD = “L”, C/D = “L”: Data
Read

9 Vee Negative Voltage — 19 FS

10 RESET H: Normal; L: Initialize T6963 H/L 20 N/C No connection —

L 15 DB4 Data Bus Line H/L

L 16 DB5 Data Bus Line H/L

H/L 18 DB7 Data Bus Line H/L

H:Pins for selection of font; H: 6*8,
L: 8*8

H/L

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Displays

Timing Characteristics - Bus Timing (Vss=0V, VDD=5V)

Item Symbol Min. Typ. Max. Unit

C/D Set-up Time tCDS 100 — — ns

C/D Hold Time tCDH 10 — — ns

CE, RD, WR Pulse Width tCDS, tRD, tWR 80 — — ns

Data Set-Up Time tDS 80 — — ns

Data Hold Time tDH 40 — — ns

Access Time tACC — — 150 ns

Output Hold Time tOH 10 — 50 ns

AND1781FST-LED

Intelligent Character Display

Purdy Electronics Corporation • 755 North Pastoria Avenue • Sunnyvale, CA 94085-2918

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Displays

Power Supply

AND1781FST-LED

Intelligent Character Display

Backlight Specifications

Item Symbol Condition Min. Typ. Max. Degree

Supply Current ILED V = 3.5V — 80 100 mA

Supply Voltage V 3.4 3.5 3.6 V

Reverse Voltage VR — — 5 V

Luminance IV ILED = 80 mA 520 650 — cd/m

LED Life Time ILED = 80 mA 25ºC, 50-60

%RH, Note1

Color White

Note: The LED of B/L is drive by current only, drive voltage is for reference only. Drive voltage can make driving current under safety area (current between
minimum and maimum).

Note 1: 50K hours is only an estimate for reference.

— 50K — Hr

2

Purdy Electronics Corporation • 755 North Pastoria Avenue • Sunnyvale, CA 94085-2918

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

11/07/12

Displays

Power Supply

AND1781FST-LED

Intelligent Character Display

Purdy Electronics Corporation • 755 North Pastoria Avenue • Sunnyvale, CA 94085-2918

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

11/07/12