Model No. WH2004A
►Character LCD 20x4
►Type: Character
►Structure : COB
►Size: 2.89 inch
►20 characters x 4 Lines
►5x8 dots includes cursor
►+5V power supply (Also available for +3V)
►Negative voltage option is only for the +3V power supply
►1/16 duty cycle
►LED can be driven by PIN1, PIN2, PIN15, PIN16 or A and K
►Interface: 6800 (ST7066 IC), option SPI/I2C (RW1063 IC)
►WH2004B : FFC connector
►WH2004F : 7 colors LED option
WH2004A is a 2.89-inch 20x4 character LCD display with 20 characters per line across 4 lines. The module uses a COB (Chip on Board) structure and measures 98.0 x 60.0 x 13.6 mm, with a viewing area (VA) of 77.0 x 25.2 mm. The default configuration uses the ST7066 LCD controller with a 6800 4/8-bit parallel interface.
The default supply voltage is 5V, with a 3V option also available. When using the 3V supply configuration, the negative voltage supply is limited to 3V. LCD display options include positive gray, positive yellow-green, negative blue, and positive or negative FSTN. LED backlight colors include blue, green, white, yellow-green, amber, red, and RGB.
Versions using the ST7066 controller are available with multiple character font sets, including English/Japanese, Western European, Scandinavian European, Cyrillic (Russian), and Hebrew/Arabic.
WINSTAR offers I2C interface options across its 20x4 character LCD product range. These I2C versions provide an alternative to the 6800 parallel interface for designs that require serial communication while using fewer MCU I/O connections. For the WH2004A series, the WH2004A2 I2C version uses the RW1063 controller.
Data source ref: WH2004A-YYH-JT#
| Item | Dimension | Unit |
|---|---|---|
| Number of Characters | 20 Characters x 4 Lines | － |
| Module dimension | 98.0 x 60.0 x 13.6 (MAX) | mm |
| View area | 77.0 x 25.2 | mm |
| Active area | 70.4 x 20.8 | mm |
| Dot size | 0.55 x 0.55 | mm |
| Dot pitch | 0.60 x 0.60 | mm |
| Character size | 2..95 x 4.75 | mm |
| Character pitch | 3.55 x 5.35 | mm |
| Duty | 1/16 | |
| Backlight Type | LED | |
| IC | ST7066U | |
| Interface | 6800 | |
| 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 |
| 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℃ |
－ 4.4 3.8 |
－ 4.5 － |
5.3 4.6 － |
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 | 1.0 | 1.2 | 1.5 | mA |
| Pin No. | Symbol | Level | Description |
|---|---|---|---|
| 1 | VSS | 0V | Ground |
| 2 | VDD | 5.0V | Supply Voltage for logic |
| 3 | VO | (Variable) | Operating voltage for LCD |
| 4 | RS | H/L | H: DATA, L: Instruction code |
| 5 | R/W | H/L | H: Read(Module→MPU) L: Write(MPU→Module) |
| 6 | E | H,H→L | Chip enable signal |
| 7 | DB0 | H/L | Data bus line |
| 8 | DB1 | H/L | Data bus line |
| 9 | DB2 | H/L | Data bus line |
| 10 | DB3 | H/L | Data bus line |
| 11 | DB4 | H/L | Data bus line |
| 12 | DB5 | H/L | Data bus line |
| 13 | DB6 | H/L | Data bus line |
| 14 | DB7 | H/L | Data bus line |
| 15 | A | － | Power supply for B/L(+) |
| 16 | K | － | Power supply for B/L(-) |
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