OK204-25-USB-OR OLED Display Module: Equivalent & Substitute Parts

Part Overview

The OK204-25-USB-OR is a character display module manufactured by Matrix Orbital, featuring an 80-character OLED display in a 20 x 4 format with 5 x 8 dot character resolution. The module communicates via USB interface and operates within a 4.75V to 5.25V supply voltage range. This part is currently classified as obsolete, making identification of active equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer	Matrix Orbital
Display Format	20 x 4 characters
Character Resolution	5 x 8 dots
Total Characters	80
Display Type	OLED
Interface	USB
Supply Voltage	4.75V ~ 5.25V
Operating Temperature	-20°C ~ 70°C
Physical Dimensions (L x W x H)	98.00mm x 60.00mm x 23.00mm
Viewing Area (L x W)	77.00mm x 25.20mm
Character Size (H x W)	4.75mm x 2.90mm
Dot Size (W x H)	0.54mm x 0.55mm
Text Color	Red
Background Color	Black
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the OK204-25-USB-OR is determined by strict equivalence across the following critical parameters:

Display Format & Resolution: 20 x 4 character layout with 5 x 8 dot character matrix
Display Technology: OLED type
Interface Protocol: USB connectivity
Electrical Specifications: 4.75V ~ 5.25V supply voltage range
Operating Temperature Range: -20°C ~ 70°C
Physical Envelope: 98.00mm x 60.00mm x 23.00mm (L x W x H)
Viewing Area Dimensions: 77.00mm x 25.20mm (L x W)
Character Dimensions: 4.75mm H x 2.90mm W
Dot Pitch: 0.54mm W x 0.55mm H

The OK204-25-USB-OW meets all substitution criteria. Differences in text color (white vs. red) and product status do not affect functional compatibility in applications where display color is not a critical design constraint.

Parameter Comparison

Parameter	OK204-25-USB-OR (Main Part)	OK204-25-USB-OW (Substitute)
Manufacturer	Matrix Orbital	Matrix Orbital
Product Status	Obsolete	Active
Display Format	20 x 4	20 x 4
Character Resolution	5 x 8 dots	5 x 8 dots
Total Characters	80	80
Display Type	OLED	OLED
Interface	USB	USB
Supply Voltage	4.75V ~ 5.25V	4.75V ~ 5.25V
Operating Temperature	-20°C ~ 70°C	-20°C ~ 70°C
Outline Dimensions (L x W x H)	98.00mm x 60.00mm x 23.00mm	98.00mm x 60.00mm x 23.00mm
Viewing Area (L x W)	77.00mm x 25.20mm	77.00mm x 25.20mm
Character Size (H x W)	4.75mm x 2.90mm	4.75mm x 2.90mm
Dot Size (W x H)	0.54mm x 0.55mm	0.54mm x 0.55mm
Text Color	Red	White
Background Color	Black	Black
MSL Rating	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	RoHS Compliant

Engineering Selection Recommendations

The OK204-25-USB-OW is the direct functional equivalent for the obsolete OK204-25-USB-OR. Selection between these parts should be based on the following criteria:

For New Designs: The OK204-25-USB-OW is the appropriate choice. It maintains identical electrical, mechanical, and interface specifications while offering active product status and RoHS compliance certification. This ensures long-term supply chain availability and regulatory alignment.

For Legacy System Maintenance: If the original red text color is a critical system requirement, the OK204-25-USB-OR may be retained from existing inventory (1025 units available). However, transition planning to the OK204-25-USB-OW is recommended due to obsolete status.

For General Replacement: The white text variant (OK204-25-USB-OW) is suitable for applications where display color is not functionally constrained. The active product status and RoHS compliance provide superior long-term support characteristics.

Frequently Asked Questions (FAQ)

Q: Can the OK204-25-USB-OW directly replace the OK204-25-USB-OR in existing applications?

A: Yes. Both modules share identical display format (20 x 4), character resolution (5 x 8 dots), OLED technology, USB interface, supply voltage range (4.75V ~ 5.25V), operating temperature range (-20°C ~ 70°C), and physical dimensions (98.00mm x 60.00mm x 23.00mm). The primary difference is text color (white vs. red) and product status (active vs. obsolete).

Q: What is the significance of the product status difference?

A: The OK204-25-USB-OR is classified as obsolete, indicating discontinued manufacturing and limited long-term availability. The OK204-25-USB-OW maintains active status, ensuring continued supply, technical support, and compliance with current regulatory standards.

Q: Are there packaging differences between these parts?

A: The OK204-25-USB-OR is specified with packaging designation "-" (not detailed). The OK204-25-USB-OW is supplied in bulk packaging. Confirm packaging requirements with your procurement specification before ordering.

Q: Does the text color difference affect electrical compatibility?

A: No. Text color is a display characteristic determined by the OLED emitter material and does not affect electrical interface, protocol, or functional operation. Selection should be based on visual requirements of the end application.

Q: Is the OK204-25-USB-OW RoHS compliant?

A: Yes. The OK204-25-USB-OW carries RoHS compliance certification. The OK204-25-USB-OR compliance status is not specified in available documentation.

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