Engineering Resource
RGB TTL LCD Interface and Selection Guide
RGB TTL is a parallel digital display interface commonly found on compact embedded LCD modules. Separate color-data, clock and synchronization signals connect the host controller to the panel.
Signals to verify
Confirm color-bit depth, pixel clock, horizontal and vertical synchronization, data-enable behavior, logic voltage, pin assignment and connector orientation. Similar connectors do not guarantee compatible signals.
Controller compatibility
The processor or controller board must output the required native timing and voltage. Cable length, signal integrity and grounding should be reviewed during hardware design.
When RGB TTL is useful
RGB TTL can suit compact HMI, handheld equipment, instruments and embedded controllers where a direct parallel interface is available.
Frequently Asked Questions
Is RGB TTL the same as LVDS?
No. RGB TTL is a parallel logic interface, while LVDS serializes data over differential pairs.
Can two 40-pin RGB panels be interchanged?
Not automatically. Pin assignment, voltage, timing, dimensions and backlight circuits may differ.
What data is required for selection?
Provide the host output, resolution, connector, voltage, timing, size and environmental requirements.