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LTP-757E Equivalent & Substitute Parts
Part Overview
The LTP-757E is a 5 x 7 dot matrix display module manufactured by Lite-On Inc., featuring a common anode row and common cathode column configuration with orange-red color output. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The module operates at 2V forward voltage with a 2mcd brightness rating and is housed in a compact 0.50" L x 0.70" W x 0.25" H form factor.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Configuration | 5 x 7 Dot Matrix |
| Internal Connection | Common Anode Row, Common Cathode Column |
| Color | Orange-Red |
| Size / Dimension | 0.50" L x 0.70" W x 0.25" H (12.66mm x 17.74mm x 6.30mm) |
| Voltage - Forward (Vf) (Typ) | 2V |
| Millicandela Rating | 2mcd |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts for the LTP-757E are qualified based on the following critical parameters:
- Configuration: 5 x 7 dot matrix layout
- Internal Connection: Common anode row, common cathode column topology
- Size / Dimension: Physical form factor 0.50" L x 0.70" W x 0.25" H
- Voltage - Forward (Vf): Operating voltage range compatible with 2V specification
- Color: Orange-red or red wavelength output
Two substitute parts meet these criteria: the LTP-757KA (Lite-On Inc., active status) and the TC07-11EWA (Kingbright, active status). Both maintain identical mechanical dimensions, electrical configuration, and forward voltage characteristics within acceptable tolerances.
Parameter Comparison
| Parameter | LTP-757E (Main) | LTP-757KA (Direct Substitute) | TC07-11EWA (MFR Recommended) |
|---|---|---|---|
| Manufacturer | Lite-On Inc. | Lite-On Inc. | Kingbright |
| Configuration | 5 x 7 | 5 x 7 | 5 x 7 |
| Internal Connection | Common Anode Row, Common Cathode Column | Common Anode Row, Common Cathode Column | Common Anode Row, Common Cathode Column |
| Color | Orange-Red | Orange-Red | Red |
| Size / Dimension | 0.50" L x 0.70" W x 0.25" H (12.66mm x 17.74mm x 6.30mm) | 0.50" L x 0.70" W x 0.25" H (12.66mm x 17.74mm x 6.30mm) | 0.50" L x 0.70" W x 0.25" H (12.70mm x 17.80mm x 6.30mm) |
| Voltage - Forward (Vf) (Typ) | 2V | 2.05V | 2V |
| Millicandela Rating | 2mcd | 3.4mcd | 8.2mcd |
| Product Status | Obsolete | Active | Active |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| RoHS Status | Not specified | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The LTP-757KA is the direct substitute for the LTP-757E, maintaining identical mechanical dimensions and electrical configuration while offering active product status and ROHS3 compliance. The forward voltage differential of 0.05V (2.05V vs. 2V) is within acceptable tolerance for standard LED driver circuits. The increased brightness rating (3.4mcd vs. 2mcd) provides improved visibility without requiring circuit redesign.
The TC07-11EWA, manufactured by Kingbright, is the manufacturer-recommended alternative. It maintains identical forward voltage (2V) and mechanical dimensions within tolerance (12.70mm x 17.80mm vs. 12.66mm x 17.74mm). The color specification differs (red vs. orange-red), and the brightness rating is significantly higher (8.2mcd vs. 2mcd). This part is suitable for applications where red wavelength output is acceptable and increased brightness is beneficial. Both substitute parts carry ROHS3 compliance and unlimited moisture sensitivity rating.
Frequently Asked Questions (FAQ)
Q: Can the LTP-757KA be used as a direct replacement for the LTP-757E?
A: Yes. The LTP-757KA maintains identical mechanical dimensions, electrical configuration (common anode row, common cathode column), and forward voltage within tolerance (2.05V vs. 2V). No circuit modifications are required.
Q: What is the difference between the LTP-757KA and TC07-11EWA?
A: Both parts share the same 5 x 7 configuration, internal connection topology, and forward voltage (2V). The LTP-757KA is manufactured by Lite-On Inc. with orange-red color output and 3.4mcd brightness. The TC07-11EWA is manufactured by Kingbright with red color output and 8.2mcd brightness. Mechanical dimensions are equivalent within manufacturing tolerance.
Q: Does the color difference between orange-red and red affect compatibility?
A: Color output is determined by the LED die wavelength and is a design specification parameter. The TC07-11EWA produces red output (627nm) versus the orange-red output of the LTP-757E and LTP-757KA. Selection depends on the application's color requirement.
Q: Are both substitute parts RoHS compliant?
A: Yes. Both the LTP-757KA and TC07-11EWA are ROHS3 compliant. The original LTP-757E does not specify RoHS status.
Q: What is the brightness difference between these parts?
A: The LTP-757E operates at 2mcd, the LTP-757KA at 3.4mcd, and the TC07-11EWA at 8.2mcd. Higher brightness ratings provide increased visibility but do not affect electrical compatibility when used with appropriate current-limiting resistors.
Q: Are there packaging differences between these parts?
A: The TC07-11EWA is supplied in tube packaging. The LTP-757E and LTP-757KA do not specify packaging format in the provided data.
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