4DLCD-FT843 Equivalent & Substitute Parts

Part Overview

The 4DLCD-FT843 is a 4.3-inch resistive touchscreen TFT LCD display module manufactured by 4D Systems Pty Ltd. It features a 480 x 272 pixel resolution with RGB color output via a 16-bit parallel interface and white LED backlight. The product is currently obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

4DLCD-FT843

4D Systems Pty LtdIn Stock: 11804DLCD-FT843 Datasheet

Current PartRFQ

GEN4-ULCD-43DT

4D Systems Pty LtdIn Stock: 715GEN4-ULCD-43DT Datasheet

SimilarRFQ

VM800C43A-D

Bridgetek Pte Ltd.In Stock: 1274VM800C43A-D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 4DLCD-FT843 are identified based on the following critical parameters that determine functional equivalence:

• Diagonal screen size: 4.3" (109.22mm)
• Display type: TFT - Color
• Display mode: Transmissive
• Touchscreen type: Resistive
• Pixel resolution: 480 x 272
• Graphics color: RGB
• Backlight: LED - White

The two identified substitutes meet these core requirements. However, interface differences exist: the main part uses a 16-bit parallel interface, while substitute parts employ alternative communication protocols (I2C/SPI/TTL or SPI only). These interface differences require design consideration during component selection.

Parameter Comparison

Engineering Selection Recommendations

Selection between substitute parts should be based on the following factors:

GEN4-ULCD-43DT: This part is manufactured by 4D Systems Pty Ltd, the same manufacturer as the main part, and maintains active product status. It is ROHS3 compliant and offers multiple interface options (I2C, SPI, TTL), providing design flexibility. The viewing area is slightly smaller (95.04mm W x 53.86mm H versus 98.70mm W x 57.50mm H), and dot pitch is specified at 0.20mm. This part is suitable for applications requiring modern compliance standards and flexible communication protocols.

VM800C43A-D: This part is manufactured by Bridgetek Pte Ltd and maintains active product status with RoHS compliance. It features an SPI interface and has an MSL rating of 1 (Unlimited), indicating superior moisture resistance. This part is suitable for applications with stringent environmental requirements or where SPI communication is preferred.

Both substitutes share identical core display specifications (4.3", 480 x 272, TFT, resistive touchscreen, RGB, white LED backlight) with the obsolete 4DLCD-FT843. Interface protocol differences require firmware and hardware adaptation during implementation.

Frequently Asked Questions (FAQ)

Q: Can the GEN4-ULCD-43DT directly replace the 4DLCD-FT843 without design changes?

A: Both parts share identical display specifications (4.3", 480 x 272 pixels, TFT, resistive touchscreen, RGB, white LED backlight). However, the interface differs: the 4DLCD-FT843 uses a 16-bit parallel interface, while the GEN4-ULCD-43DT uses I2C, SPI, or TTL. Design modifications to the communication layer are required.

Q: What are the viewing area differences between these parts?

A: The 4DLCD-FT843 has a viewing area of 98.70mm W x 57.50mm H. The GEN4-ULCD-43DT has a viewing area of 95.04mm W x 53.86mm H. The VM800C43A-D viewing area is not specified in the provided data. These differences may affect mechanical fit in existing enclosures.

Q: Which substitute part offers better environmental protection?

A: The VM800C43A-D has an MSL rating of 1 (Unlimited), indicating superior moisture resistance compared to the GEN4-ULCD-43DT, which has an MSL rating of Not Applicable. For applications in humid or moisture-prone environments, the VM800C43A-D is the more suitable choice.

Q: Are both substitute parts RoHS compliant?

A: Yes. The GEN4-ULCD-43DT is ROHS3 compliant, and the VM800C43A-D is RoHS compliant. Both meet current regulatory requirements.

Q: What is the dot pitch specification for these parts?

A: The GEN4-ULCD-43DT specifies a dot pitch of 0.20mm W x 0.20mm H. The 4DLCD-FT843 and VM800C43A-D do not have dot pitch values provided in the available data.