Model No. WG14432A3/A5
►Graphic LCD 144x32
►Type: Graphic
►Structure: COB
►Size: 2.44"
►IC: ST7920
►WG14432A3:+3.3V power supply / WG14432A5:+5V power supply
►Internal boost option
►1/32 duty cycle
►LED can be driven by PiN15, PIN16 or A, K
►Chinese version
►Same size as WH1602C
►Interface: default 6800; optional SPI
WG14432A3 and WG14432A5 are monochrome 144x32 graphic LCD modules featuring a COB (Chip on Board) structure with an integrated PCB. Both share the same outline dimensions as the WH1602C character LCD and provide a 2.44-inch diagonal active display area.
Both models use the ST7920 controller IC and support a default 6800 8-bit parallel interface, with an optional 4-wire SPI interface.
The key difference lies in power supply requirements: WG14432A3 operates at +3.3V and offers an optional internal voltage booster for stable operation at this voltage, while WG14432A5 is designed for +5V power supply without the need for boosting.
The WG14432A series supports both Traditional Chinese and Simplified Chinese fonts, making it suitable for a wide range of applications. The modules are rated for operating temperatures between -20℃ and +70℃, and storage temperatures from -30℃ to +80℃.
| Item | Dimension | Unit |
|---|---|---|
| Number of dots | 144 x 32 | － |
| Module dimension | 85.0 x 36.0 x 13.2 (MAX) | mm |
| View area | 66.0 x 16.0 | mm |
| Active area | 60.44 x 13.4 | mm |
| Dot size | 0.38 x 0.38 | mm |
| Dot pitch | 0.42 x 0.42 | mm |
| Duty | 1/32 | |
| Backlight Type | LED | |
| IC | ST7920 | |
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Temperature | TOP | -20 | － | +70 | ℃ |
| Storage Temperature | TST | -30 | － | +80 | ℃ |
| Input Voltage | VIN | -0.3 | － | VDD+0.3 | V |
| Supply Voltage For Logic | VDD-VSS | -0.3 | － | 5.5 | V |
| Supply Voltage For LCD | VO-VSS | 0 | － | 7.0 | V |
| Item | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage For Logic | VDD-VSS | － | 3.0 | 3.3 | 3.6 | V |
| Supply Voltage For LCD | V0-VSS | Ta=-20℃ Ta=25℃ Ta=+70℃ |
－ － － |
－ － － |
－ － － |
V V V |
| Input High Volt. | VIH | － | 0.7VDD | － | VDD | V |
| Input Low Volt. | VIL | － | -0.3 | － | 0.6 | V |
| Output High Volt. | VOH | － | 0.8 VDD | － | VDD | V |
| Output Low Volt. | VOL | － | 0 | － | 0.1 | V |
| Supply Current | IDD | VDD=3.3V | 1.6 | 2.2 | 3.5 | mA |
| Pin No. | Symbol | Level | Description |
|---|---|---|---|
| 1 | VSS | 0V | GND |
| 2 | VDD | 3.3V | Power Supply |
| 3 | NC | － | No connection |
| 4 | RS | H/L | H: Data , L : Instruction |
| 5 | R/W | H/L | H: Read (MPU←Module) , L: Write (MPU→Module) |
| 6 | E | H/L | 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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