LTP-2657AA Equivalent & Substitute Parts

Part Overview

The LTP-2657AA is a 5 x 7 dot matrix display module manufactured by Lite-On Inc., featuring dual-color LED elements (Green and Orange-Red) with common cathode row and common anode column configuration. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design requirements and production continuity. The module operates at 2.1V for green elements and 2V for orange-red elements, with a brightness rating of 4.8mcd for both colors.

Key Parameters

Parameter	Value
Configuration	5 x 7 dot matrix
Internal Connection	Common Cathode Row, Common Anode Column
Color	Green, Orange-Red
Voltage - Forward (Vf) Typical	2.1V Green, 2V Orange-Red
Millicandela Rating	4.8mcd Green, 4.8mcd Orange-Red
Physical Dimensions	0.89" L x 1.25" W x 0.32" H (22.60mm x 31.80mm x 8.00mm)
Moisture Sensitivity Level	MSL 1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LTP-2657AA are qualified based on the following critical parameters:

Configuration match: 5 x 7 dot matrix array
Internal connection topology: Common Cathode Row, Common Anode Column
Forward voltage compatibility: Green element Vf within 2.0V to 2.2V range; Orange-Red or Red element Vf at 2.0V
Moisture Sensitivity Level: MSL 1 or equivalent
Physical form factor: Comparable dimensions to enable PCB layout compatibility

The LTP-1257AA-01 qualifies as a direct manufacturer-recommended substitute, maintaining identical electrical specifications and internal connection architecture while offering active product status. The TBA20-22EGWA qualifies as a functional equivalent with compatible electrical parameters, though dimensional differences and brightness variations require design verification for specific applications.

Parameter Comparison

Parameter	LTP-2657AA (Main)	LTP-1257AA-01 (Substitute)	TBA20-22EGWA (Substitute)
Manufacturer	Lite-On Inc.	Lite-On Inc.	Kingbright
Configuration	5 x 7	5 x 7	5 x 7
Internal Connection	Common Cathode Row, Common Anode Column	Common Cathode Row, Common Anode Column	Common Cathode Row, Common Anode Column
Color	Green, Orange-Red	Green, Orange-Red	Green, Red
Vf (Green)	2.1V	2.1V	2.2V
Vf (Orange-Red/Red)	2.0V	2.0V	2.0V
Brightness (Green)	4.8mcd	4.8mcd	15mcd
Brightness (Orange-Red/Red)	4.8mcd	4.8mcd	10mcd
Dimensions (L x W x H)	0.89" x 1.25" x 0.32" (22.60mm x 31.80mm x 8.00mm)	0.90" x 1.25" x 0.32" (22.90mm x 31.80mm x 8.00mm)	1.50" x 2.09" x 0.33" (38.10mm x 53.10mm x 8.50mm)
MSL Rating	MSL 1	MSL 1	MSL 1
Product Status	Obsolete	Active	Active
RoHS Compliance	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The LTP-1257AA-01 is the primary substitute for the LTP-2657AA. Both components are manufactured by Lite-On Inc. and maintain identical electrical specifications, internal connection architecture, and brightness ratings. The LTP-1257AA-01 offers active product status and ROHS3 compliance, providing supply chain continuity and regulatory alignment. Dimensional variance is minimal (0.30mm length difference), making this substitute suitable for direct replacement in existing PCB layouts.

The TBA20-22EGWA from Kingbright qualifies as a functional equivalent for applications where increased brightness is acceptable. This substitute maintains compatible forward voltage specifications and internal connection topology. However, the significantly larger physical dimensions (1.50" x 2.09" versus 0.89" x 1.25") and higher brightness output (15mcd green, 10mcd red versus 4.8mcd) require design-level evaluation for PCB layout compatibility and optical performance alignment.

Frequently Asked Questions (FAQ)

Q: Can the LTP-1257AA-01 be used as a direct replacement for the LTP-2657AA?

A: Yes. The LTP-1257AA-01 maintains identical electrical specifications, internal connection configuration, and brightness ratings as the LTP-2657AA. Dimensional differences are negligible (0.30mm length variance), supporting direct PCB substitution.

Q: What are the key differences between the LTP-1257AA-01 and TBA20-22EGWA?

A: Both maintain compatible forward voltage and internal connection topology. Primary differences include manufacturer (Lite-On versus Kingbright), brightness output (4.8mcd versus 15mcd green; 4.8mcd versus 10mcd red), and physical dimensions (0.89" x 1.25" versus 1.50" x 2.09"). The TBA20-22EGWA is significantly larger and brighter.

Q: Are there color compatibility considerations between substitutes?

A: The LTP-1257AA-01 maintains the original dual-color configuration (Green, Orange-Red). The TBA20-22EGWA uses Green and Red elements. Both color pairs operate at compatible forward voltages and brightness levels suitable for dot matrix display applications.

Q: What compliance certifications apply to these substitutes?

A: The LTP-1257AA-01 and TBA20-22EGWA are both ROHS3 compliant and MSL 1 rated. Both carry EAR99 ECCN classification and HTSUS code 8541.41.0000.

Q: Does physical size affect substitution decisions?

A: Yes. The LTP-1257AA-01 offers minimal dimensional variance and supports direct PCB layout compatibility. The TBA20-22EGWA requires PCB redesign due to significantly larger form factor (approximately 1.7x length and 1.7x width). Evaluate mechanical constraints and available board space before selection.

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