Square LCD Screen 1.54-inch IPS TFT Module - RFA401540A-AAH-DSN - Raystar

1.54-inch IPS TFT Square LCD Screen Module SPI 240x240 (ST7789T3-G4-1 IC)

Model No. RFA401540A-AAH-DSN

The RFA401540A-AAH-DSN is a 1.54-inch high-brightness 240×240 SPI IPS TFT LCD module. Its IPS technology delivers 80/80/80/80 viewing angles, while the high brightness (850 cd/㎡) and anti-glare surface ensure excellent contrast and readability under various lighting conditions. With a square active area that enhances square LCD screen performance and the ST7789T3-G4-1 driver IC, this compact display provides crisp and stable rendering for modern embedded systems.

Its LED backlight ensures long-term reliability with a 30,000-hour lifetime, making it suitable for demanding environments. This square LCD screen module is ideal for industrial control systems, portable measurement instruments, outdoor displays, and home automation panels, delivering dependable performance across an operating temperature range of −10°C to +60°C. As a versatile square LCD solution, it meets the needs of applications requiring a compact and durable display format.

If you need technical support or product quotes for the RFA401540A-AAH-DSN or other square LCD modules, please feel free to contact our sales team!

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General Specs
Interface Pin Function
Contour Drawing
Absolute Maximum Ratings
Electrical Characteristics

Item	Dimension	Unit
TFT Series	IPS TFT LCD,High Brightness TFT,Wide View TFT
Size (Diagonal)	1.54	inch
Dot Matrix / Resolution	240 × RGB × 240 (TFT)	dots
Module Dimension	31.52 × 33.72 × 1.94	mm
Active Area	27.72 × 27.72	mm
Dot / Pixel Pitch	0.1155 × 0.1155	mm
LCD Type	TFT, Normally Black, Transmissive
View Direction	80/80/80/80 (IPS)
Backlight Type	LED, Normally White
Control Board	No
Power Board	No
IC	ST7789T3-G4-1
Interface	SPI
Touch Panel	Without Touch Panel
Surface	Anti-Glare
Brightness	850	cd/㎡
O-Film	No
Operating Temperature	-10~+60	°C
Storage Temperature	-20~+70	°C

SPI Interface and Control Signal Overview

Pin No.	Symbol	Function
1	GND	Ground.
2	IOVCC	Power Supply for I/O System(VDDI)
3	CS	Chip selection pin(CSX)
4	RESET	This signal will reset the device(Active Low, RESX)
5	RS	Display data/command selection pin in 4-line serial interface(D/CX)
6	GND	Ground.
7	SCL	This pin is used to be serial interface clock
8	SDA	SPI interface input/output pin(In: DIN, Out: DOUT)
9	GND	Ground.
10	VDD	Power Supply for Analog
11	FMARK	Tearing effect signal is used to synchronize MCU to frame memory writing.
12	VLED-	Power Supply For LED Backlight Cathode Input
13	VLED-	Power Supply For LED Backlight Cathode Input.
14	VLED+	Power Supply For LED Backlight Anode Input.
15	VLED+	Power Supply For LED Backlight Anode Input.

Mechanical Layout and Square LCD Dimensions

Square LCD Screen 1.54-inch IPS TFT Module - RFA401540A-AAH-DSN Contour Drawing - Raystar

Environmental and Electrical Limits

Item	Symbol	Min	Typ	Max	Unit
Operating Temperature	TOP	-10	－	+60	℃
Storage Temperature	TST	-20	－	+70	℃

Operating Conditions of 1.54-inch Square LCD Module

Display Performance of Square LCD Module

Parameter	Symbol	Value			Unit	Remark
Parameter	Symbol	Min	Typ	Max	Unit	Remark
Analog Supply Voltage	VDD	2.4	2.8	3.3	V	-
Power Supply for I/O System	IOVCC	1.65	1.8	3.3	V	IOVCC≦VDD
Input High Voltage	VIH	0.7 IOVCC	-	IOVCC	V	Digital input pins
Input Low Voltage	VIL	0	-	0.3 IOVCC	V	Digital input pins
Output High Voltage	VoH	0.8 IOVCC	-	IOVCC	V	Digital input pins
Output Low Voltage	VoL	0	-	0.2 IOVCC	V	Digital input pins
(Panel+LSI) Power Consumption	Black Mode	-	6.0	-	mA	VDD =2.8V
(Panel+LSI) Power Consumption	Sleeping Mode	-	0.015	-	mA	VDD =2.8V