40x4 Character LCD Display, Display LCD 40x4
Model No. WH4004A1
►Character Display LCD 40x4
►5x8 dots includes cursor
►IC: ST7066
►+5V power supply (Also available for +3V)
►Negative voltage optional for +3V power supply
►1/16 duty cycle
►Interface: 6800
►LED can be driven by PIN1, PIN2, PIN17, PIN18 or A and K
Description
WH4004A1 is 40x4 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 40x4 LCD display WH4004A1 is available for no backlight or with LED backlight options. This LCD display 40x4 is available in various LCD panel colors including gray, yellow/green and blue LCD options. This display LCD 40x4 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.
DRAWING
SPECIFICATIONS
40x4 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- |
General Specification
| 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
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Temperature | TOP | -20 | - | +70 | ℃ |
| Storage Temperature | TST | -30 | - | +80 | ℃ |
| Input Voltage | VI | VSS | - | VDD | V |
| Supply Voltage For Logic | VDD-VSS | -0.3 | - | 7 | V |
| Supply Voltage For LCD | VDD-Vo | -0.3 | - | 13 | V |
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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