Purdy AND471GST User Manual

Displays

Intelligent Character Display

AND471GST-LED

Intelligent Character Display

The AND471GST-LED is an STN Positive Gray liquid crystal
display. It has a transflective rear polarizer, yellow green LED backlight, 6
o-clock viewing angle with a normal temperature range, a 5V single supply
voltage on a black frame.

Features

• STN Gray Positive LCD Type

• Transflective Rear Polarizer

• Yellow Green LED Backlight Type

• 6 O’Clock Viewing Direction

• Normal Temperature Range

• Black Frame

• ROHS Compliant

Mechanical Characteristics

Item Standard Value Unit

Module Dimension 122.0 (W) x 44.0 (H) x 8.8 (13.0 LED) Max (D) mm

Viewing Area 99.0 (W) x 24.0 (H) mm

Dot Size 0.92 (W) x 1.16 (H) mm

Dot Pitch 0.98 (W) x 1.21 (H) mm

Display Format 16 characters (W) x 2 lines (H) —

Duty Ratio 1/16 —

Controller ST7066U or equivalent —

AND471GST-LED

Electrical Absolute Maximum Ratings

Item Symbol Min. Typ. Max. Unit

Power Supply for Logic VDD - VSS -0.3 — 7.0 V

Power Supply for LCD VDD - VO -0.3 — 10.0 V

Input Voltage VI -0.3 — VDD V

LED Power Dissipation PAD — — 1794 mW

LED Forward Current IAF — — 390 mA

LED Reverse Voltage VR — — 8 V

Environmental Absolute Maximum Ratings

Item Normal Temperature

Operating Storage

Min. Max. Min. Max.

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

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

Note 2: Ta ≤ 50 ºC: 80% RH max; ta> 50ºC: Absolute humidity must be lower than the humidity of 85% RH at 50ºC.
Note 3: Ta at -20 ºC will be < 48 hours at 70 ºC will be <120 hrs when humidity is higher than 70%.
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 70%.

Product specifications contained herein may be changed without prior notice.

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Displays

AND471GST-LED

Intelligent Character Display

Electrical Characteristics

Item Symbol Condition Min. Typ. Max. Unit

Power Supply for Logic VDD-VSS — 4.5 5.0 5.5 V

Input Voltage VIL L Level 0 — 0.6 V

VIH H Level 2.2 — VDD V

Ta = 0ºC — — —
LCM Recommend LCD Module
Driving Voltage

Power Supply Current for LCM IDD VDD = 5.0V, VDD-VO=4.5V — 2.0 3.0 mA

LED Forward Voltage VF IF=260 mA — 4.1 4.6 V

LED Forward Current IF — — 260 — mA

LED Reverse Current IR VR = 8V — — 0.2 mA

Optical Characteristics (Ta = 25 ºC)

VDD-VO

Ta = 25ºC 4.2 4.5 4.8

Ta = 50ºC — — —

V

Item Symbol Remarks

Min.

Φ f (12 o’clock)

Viewing Angle

Rise Time Tr

Fall Time Tf – 250 –

Frame Frequency Frm – 64 – Hz

Contrast Cr – 3.0 – –

Brightness of Backlight L

Peak Emission Wavelength λ P 567 570 577 nm

Φ b (6 o’clock) – 40 –

Φ l (9 o’clock) – 30 –

Φ r (3 o’clock) – 30 –

When CR ≥ 1.4

VDD-VO = 4.5 V

Ta = 25ºC

IF = 260 mA

– 20 –

– 200 – mS

120 180 – cd/m

Specifications

Typ. Max.

Interface Pin Assignment

Pin No. Symbol Level Description Pin No Symbol Level Description

1 VSS 0V Power Supply Ground 9 DB2 H/L Data Bit 2

2 VDD 5.0V Power Supply Voltage 10 DB3 H/L Data Bit 3

3 V0 — Contrast Adjustment 11 DB4 H/L Data Bit 4

4 RS H/L Register Select 12 DB5 H/L Data Bit 5

5 R/W H/L Read / Write 13 DB6 H/L Data Bit 6

6 E H, H —> L Enable Signal 14 DB7 H/L Data Bit 7

7 DB0 H/L Data Bit 0 15 A 4.1V LED Power Supply (+)

8 DB1 H/L Data Bit 1 16 K — LED Power Supply (-)

Units

deg

2

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Displays

Block Diagram

Power Supply

AND471GST-LED

Intelligent Character Display

Backlight Specifications

Item Symbol Condition Min. Typ. Max. Units

Supply Current ILED V = 3.5V 43.2 48 75 mA

Supply Voltage V — 3.4 3.5 3.6 —

Reverse Voltage VR — — — 5 V

Luminous Intensity IV ILED = 48 mA 16 20 (Note 1) — cd/m

LED Life Time (For Reference Only) — ILED≤ 48 mA, 25 ºC, 50-60% RH, (Note 2) — 50K — Hr

Color White

Note 1: 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 maximum.)
The luminous is measured through LCD panel.

Note 2: 50K hours is only an estimate for reference.

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

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Displays

Mechanical Dimensions

AND471GST-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

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