LTP-2157AY LED Matrix 5x7 Yellow Dot Display Equivalent & Substitute Parts

Part Overview

The LTP-2157AY is a 5x7 dot matrix display module manufactured by Lite-On Inc., featuring a yellow LED configuration with common anode row and common cathode column internal connections. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. The module operates at a forward voltage of 2.1V with a brightness rating of 4.8mcd and is housed in a compact form factor measuring 1.50" L x 2.09" W x 0.34" H (38.10mm x 53.10mm x 8.60mm).

Substiute Parts

LTP-2157AY

Lite-On Inc.In Stock: 701LTP-2157AY Datasheet

Current PartRFQ

TC20-11YWA

KingbrightIn Stock: 888TC20-11YWA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTP-2157AY are identified based on strict electrical and mechanical compatibility criteria. The following parameters must align for functional equivalence:

• Configuration: 5 x 7 dot matrix array
• Color: Yellow LED wavelength (590nm nominal)
• Internal Connection: Common Anode Row, Common Cathode Column topology
• Voltage - Forward (Vf): 2.1V nominal operation
• Physical Dimensions: Compatible form factor within tolerance
• Moisture Sensitivity Level: MSL 1 classification

The TC20-11YWA from Kingbright meets all substitution criteria, maintaining identical electrical specifications and pin configuration while offering improved brightness characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The TC20-11YWA serves as a direct electrical and mechanical substitute for the LTP-2157AY. Both components share identical configuration, color specification, internal connection topology, and forward voltage rating. The TC20-11YWA maintains active product status with ROHS3 compliance and REACH unaffected certification, supporting long-term supply chain continuity. The increased brightness rating (9mcd versus 4.8mcd) represents an enhancement in optical performance without altering electrical interface requirements. Dimensional compatibility is confirmed within standard manufacturing tolerances, with height variance of 0.10mm (8.60mm to 8.50mm) remaining within acceptable PCB assembly specifications.

Frequently Asked Questions (FAQ)

Q: Can the TC20-11YWA replace the LTP-2157AY in existing designs without circuit modification?

A: Yes. Both components operate at identical forward voltage (2.1V), share the same internal connection topology (Common Anode Row, Common Cathode Column), and maintain compatible physical dimensions. No circuit redesign is required.

Q: What is the significance of the increased millicandela rating in the TC20-11YWA?

A: The TC20-11YWA provides 9mcd brightness compared to the LTP-2157AY's 4.8mcd. This represents improved optical output while maintaining all electrical specifications. Applications requiring the original brightness level will function without modification; applications benefiting from increased visibility will experience enhanced performance.

Q: Are there dimensional concerns when substituting the TC20-11YWA for the LTP-2157AY?

A: Dimensions are compatible. The TC20-11YWA measures 1.50" L x 2.09" W x 0.33" H versus the LTP-2157AY's 1.50" L x 2.09" W x 0.34" H. The 0.10mm height reduction falls within standard PCB assembly tolerances and does not affect mounting or electrical connectivity.

Q: What compliance advantages does the TC20-11YWA offer?

A: The TC20-11YWA carries ROHS3 compliance and REACH unaffected certification, supporting regulatory requirements in EU and international markets. The LTP-2157AY compliance status is not specified in available documentation.

Q: Is the LTP-2157AY still available for procurement?

A: The LTP-2157AY is classified as obsolete. The TC20-11YWA is actively manufactured and stocked, ensuring reliable supply chain access for new designs and production continuity.