WH4004A1 is 40×4 Character LCD display module which is built in with ST7066U controller IC; its default interface is 6800 4/8-bit parallel and 5V or 3.3V power supply option. This 40×4 LCD display WH4004A1 is available for no backlight or with LED backlight options. This LCD display 40×4 is available in various LCD panel colors including gray, yellow/green and blue LCD options. This display LCD 40×4 module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃, its built in character set supports English/Japanese, English/West European, English/Scandinavian European, or English/Cyrillic (Russian) options.
40×4 Character LCD Display, Display LCD 40×4
Model No. WH4004A1
- Character Display LCD 40×4
- 5×8 dots includes cursor
- IC: ST7066
- +5V power supply (Also available for +3V)
- Negative voltage option is only for the +3V power supply
- 1/16 duty cycle
- Interface: 6800
- LED can be driven by PIN1, PIN2, PIN17, PIN18 or A and K
Description
Drawing
Drawing
Specifications
Specifications
40×4 Character LCD Datasheet
Interface Pin Function
| Pin No. | Symbol | Level | Description |
|---|---|---|---|
| 1 | DB7 | H/L | Data bus line |
| 2 | DB6 | H/L | Data bus line |
| 3 | DB5 | H/L | Data bus line |
| 4 | DB4 | H/L | Data bus line |
| 5 | DB3 | H/L | Data bus line |
| 6 | DB2 | H/L | Data bus line |
| 7 | DB1 | H/L | Data bus line |
| 8 | DB0 | H/L | Data bus line |
| 9 | E1 | H,H→L | Chip enable signal |
| 10 | R/W | H/L | H: Read(Module→MPU) L: Write(MPU→Module) |
| 11 | RS | H/L | H: DATA, L: Instruction code |
| 12 | VO | (Variable) | Operating voltage for LCD |
| 13 | VSS | 0V | Ground |
| 14 | VDD | 5.0V | Supply Voltage for logic |
| 15 | E2 | H,H→L | Chip enable signal |
| 16 | NC | – | NC |
| 17 | A | – | Power Supply for LED+ |
| 18 | K | – | Power Supply for LED- |
Mechanical Data
Mechanical Data
| Item | Dimension | Unit |
|---|---|---|
| Number of Characters | 40 characters x 4Lines | – |
| Module dimension | 190.0 x 54.0 x 13.6 (MAX) | mm |
| View area | 147.0 x 29.5 | mm |
| Active area | 140.45 x 23.16 | mm |
| Dot size | 0.50 x 0.55 | mm |
| Dot pitch | 0.57 x 0.62 | mm |
| Character size | 2.78 x 4.89 | mm |
| Character pitch | 3.53 x 6.09 | |
| Duty | 1/16 | |
| Backlight Type | LED | |
| IC | ST7066U | |
| Interface | 68 series | |
Absolute Maximum Ratings
Electrical Characteristics
Electrical Characteristics
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage For Logic | VDD-VSS | – | 4.5 | 5.0 | 5.5 | V |
| Supply Voltage For LCD | VDD-V0 | Ta=-20℃ Ta=25℃ Ta=70℃ |
－ 4.2 3.8 |
－ 4.35 － |
5.7 4.5 － |
V V V |
| Input High Volt. | VIH | – | 0.7 VDD | – | VDD | V |
| Input Low Volt. | VIL | – | VSS | – | 0.6 | V |
| Output High Volt. | VOH | – | 3.9 | – | VDD | V |
| Output Low Volt. | VOL | – | 0 | – | 0.4 | V |
| Supply Current | IDD | VDD=5.0V | 1.8 | 3.5 | 7.0 | mA |
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