Home Products Character LCD WH2004B

LCD Character Module 20x4

Model No. WH2004B

►Character LCD 20x4
►5x8 dots includes cursor
►+5V power supply (Also available for +3V)
►Negative voltage optional for +3V power supply
►1/16 duty cycle
►LED can be driven by PIN1, PIN2, PIN15, PIN16 or A and K
►Interface: 6800 (ST7066 IC or Equivalent), option SPI/I2C (RW1063 IC)
►WH2004B : FFC connector
►WH2004F : 7 colors LED option


WH2004B is a 20x4 Character LCD display module which is built in with ST7066 controller IC; its default interface is 6800 4/8-bit parallel, +5V power supply.   This type of module can be operating at temperatures from -20℃ to +70℃; its storage temperatures range from -30℃ to +80℃.  WH2004B is available in several different backlight colors including blue, green, yellow-green, amber, red and white LEDs. The LEDs can be driven by pin 1, pin 2, or pin 15 pin 16 or A/K.  The WH2004B have the same outline dimension and VA size, AA size as WH2004A but with different pin out.  WH2004A is having 16-pin hole on PCB, as to the WH2004B is having a FFC connector.

There are different interface options for WH2004B series, details as below:
►WH2004B : 6800 interface (ST7066 IC)
►WH2004B1 : SPI interface (RW1063 IC)
►WH2004B2 : I2C interface (RW1063 IC)


Winstar WH2004B - LCD Character Module 20x4 Drawing


Interface Pin Function

Pin No. Symbol Description
1 VSS Ground
2 VDD Power supply for logic
3 VO Contrast Adjustment
4 RS Data/ Instruction  select signal
5 R/W Read/Write select signal
6 E Enable signal
7~14 DB0~DB7 Data bus line
15 A Power supply for B/L +
16 K Power supply for B/L -

Mechanical Data

Item Standard Value Unit
Module Dimension 98.0 × 60.0 mm
Viewing Area 77.0 × 25.2 mm
Mounting Hole 93.0 × 55.0 mm
Character Size 2.95 × 4.75 mm

Electrical Characteristics

Item Symbol Standard Value
Input Voltage VDD 3/5 V
Recmmended LCD Driving
Voltage for Normal Temp.
Version module @25°C
VDD-VO 4.50 V

Display Character Address Code

Display Position 1 2 3 4 5 6 7 8 9 10 11 12 13 --- --- 20
DD RAM Address 00 01 02                         13
DD RAM Address 40 41 42                         53
DD RAM Address 14 15 16                         27
DD RAM Address 54 35 56                         67

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