Overview
The Sharp LM40X21A is a character-type LCD module engineered for industrial and commercial applications requiring compact, reliable alphanumeric display. This transmissive STN LCD delivers clear visibility with a 40-character × 2-line format and 5×7 dot-matrix character composition. Widely used in control panels, point-of-sale terminals, measuring instruments, and telecommunications equipment, the LM40X21A provides cost-effective visual feedback for system operators.
Key Features
- 40 characters × 2 lines display format for information-rich output
- STN LCD (Transmissive) technology ensures high contrast and wide viewing angle
- 5 × 7 dot-matrix character generation with cursor capability
- 14-pin connector and 3-pin ribbon cable interface for simple integration
- Compact form factor suitable for tight panel layouts
- Proven design for industrial, POS, and measurement applications
Technical Specifications
The Sharp LM40X21A meets the needs of legacy and modern industrial control systems where character-based LCD display is required. Its standardized pinout and ribbon cable interface simplify retrofit and new build installations.
Typical Applications
- Industrial control panel operator interfaces
- Point-of-sale (POS) terminal displays
- Measuring instrument readouts (scales, gauges, test equipment)
- Telecommunications and fax machine displays
- Process monitoring and diagnostic systems
- Legacy equipment retrofits and modernization projects
Compatibility & Replacements
Compatible With
- Allen-Bradley control systems and operator panels
- Siemens automation equipment requiring character display output
- Industrial PC and embedded system platforms
- Stand-alone control modules with standard 14-pin LCD interface
- Custom industrial applications using TTL logic interfaces
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Sharp LM40X21A may serve as a replacement for other 40×2 character LCD modules with identical pinout and connector type; consult original equipment documentation for confirmation.
Works With
- TTL and CMOS compatible logic levels (standard industrial control voltages)
- Parallel data bus interface (8-bit or 4-bit mode)
- Standard LCD controller ICs and driver circuits
- Legacy and contemporary industrial control software platforms
