LCD 20x4 I2C Display - LCD 2004 Module - RC2004C - Raystar

LCD 20x4 I2C Display Module Character 4.92-inch COB Type (ST7066 IC)

Model No. RC2004C

The RC2004C is a 4.92-inch 20×4 COB Character LCD Module designed for industrial and embedded applications that require reliable and clear text display. This LCD 2004 I2C module delivers stable performance with high compatibility. The default interface of the RC2004C module is 6800, driven by the ST7066U controller, ensuring consistent operation and easy integration into standard LCD display 20x4 I2C systems.

For flexible system design, SPI and I2C interfaces are also available by replacing the IC with RW1063. The LCD 20x4 I2C interface version provides a simplified wiring scheme and efficient data communication, making it ideal for cost-sensitive and low-power applications. The RC2004C LCD display 20x4 I2C type offers dependable performance for measurement devices, control panels, and automation equipment.

If you need technical support or product quotations for the RC2004C or other LCD 2004 I2C modules, please feel free to contact our sales team!

Data Source Ref: RC2004C-FHW-JSX

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Item	Dimension	Unit
Structure	COB
Size (Diagonal)	4.92	inch
Dot Matrix / Resolution	5×8 dots includes cursor	dots
Characters × Lines	20 Characters × 4 Lines
Module Dimension	146.0 × 62.5 × 13.6 (Max.)	mm
Viewing Area	123.5 × 43.0	mm
Active Area	118.84 × 38.47	mm
Mounting Hole	139.0 × 55.5	mm
Dot / Pixel Size	0.92 × 1.10	mm
Dot / Pixel Pitch	0.98 × 1.16	mm
Character Size	4.84 × 9.22	mm
Character Pitch	6.0 × 9.75	mm
IC	ST7066, Option RW1063
Interface	6800, Option SPI / I2C (RW1063 IC)
Power Supply	5V (Also available for 3V) Negative voltage optional for 3V power supply
Duty	1/16 duty cycle
Type	Character LCD Display
Feature	LED can be driven by PIN1, PIN2, PIN15, PIN16 or A and K

Pin Configuration for LCD 2004 I2C Display

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	－	LED +
16	K	－	LED -
17	NC	－	No connection
18	NC	－	No connection

Mechanical Layout of LCD Display 20x4 I2C

LCD 20x4 I2C Display Contour Drawing - LCD 2004 Module - RC2004C - Raystar

LCD 20x4 I2C Operating Conditions

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

Typical Power and Voltage Specs for LCD 2004 I2C

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℃	－ 4.1 3.5	－ 4.2 －	5.4 4.3 －	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	0.4	2.0	4.0	mA

Display position	1	2	20
DD RAM Address	00	01	13
DD RAM Address	40	41	53
DD RAM Address	14	15	27
DD RAM Address	54	55	67