OK204-25-OB OLED Character Display Module - Equivalent & Substitute Parts

Part Overview

The OK204-25-OB is a 20x4 character OLED display module manufactured by Matrix Orbital, featuring an 80-character capacity with 5x8 dot matrix character format. This module supports multiple communication interfaces including I2C, RS-232, and TTL, making it suitable for embedded systems and industrial applications requiring alphanumeric display output.

The OK204-25-OB is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system compatibility and ensure continued availability for replacement, repair, and new design implementations where this display format is required.

Substiute Parts

OK204-25-OB

Matrix OrbitalIn Stock: 1036OK204-25-OB Datasheet

Current PartRFQ

OK204-25-OW

Matrix OrbitalIn Stock: 1212OK204-25-OW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Display Specifications: 20x4 character format with 80-character capacity and 5x8 dot matrix character format
• Physical Dimensions: Outline dimensions of 98.00mm x 60.00mm x 26.10mm and viewing area of 77.00mm x 25.20mm
• Electrical Specifications: Supply voltage range of 4.75V ~ 5.25V
• Interface Compatibility: Support for I2C, RS-232, and TTL communication protocols
• Operating Environment: Temperature range of -20°C ~ 70°C
• Display Technology: OLED display type with character size of 4.75mm H x 2.90mm W

The OK204-25-OW qualifies as a direct substitute based on complete alignment with all critical parameters listed above. The primary distinction between these parts is the text color (blue for OK204-25-OB versus white for OK204-25-OW) and product status (obsolete versus active).

Parameter Comparison

Engineering Selection Recommendations

The OK204-25-OW is the qualified substitute for the obsolete OK204-25-OB. Both parts maintain identical electrical, mechanical, and functional specifications across all critical parameters including display format, dimensions, voltage supply, interface protocols, and operating temperature range.

The OK204-25-OW offers the advantage of active product status, ensuring continued availability and supply chain reliability. Additionally, the OK204-25-OW carries RoHS compliance certification, meeting environmental and regulatory requirements for new designs and applications subject to RoHS directives.

The primary difference between these parts is the text color output: the OK204-25-OB displays blue text while the OK204-25-OW displays white text. This distinction is a visual characteristic only and does not affect electrical compatibility, interface functionality, or mechanical fit within existing designs.

Frequently Asked Questions (FAQ)

Q: Can the OK204-25-OW be used as a direct replacement for the OK204-25-OB in existing designs?

A: Yes. The OK204-25-OW is electrically and mechanically equivalent to the OK204-25-OB. Both parts share identical display format (20x4), character capacity (80), physical dimensions (98.00mm x 60.00mm x 26.10mm), supply voltage (4.75V ~ 5.25V), and interface options (I2C, RS-232, TTL). The only difference is text color: blue for the OB variant and white for the OW variant.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is based on equivalence across display specifications (20x4 format, 80 characters, 5x8 dot matrix), physical dimensions (98.00mm x 60.00mm x 26.10mm), electrical specifications (4.75V ~ 5.25V supply), interface support (I2C, RS-232, TTL), operating temperature range (-20°C ~ 70°C), and OLED display technology.

Q: Does the text color difference between OK204-25-OB and OK204-25-OW affect compatibility?

A: No. Text color is a visual output characteristic and does not affect electrical compatibility, interface functionality, or mechanical fit. Selection between blue (OB) and white (OW) text should be based on application-specific visibility and aesthetic requirements.

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

A: Yes. The OK204-25-OW is RoHS compliant. The OK204-25-OB RoHS status is not specified in available documentation.

Q: What communication interfaces are supported by both parts?

A: Both the OK204-25-OB and OK204-25-OW support I2C, RS-232, and TTL interfaces, providing flexibility for integration with various microcontroller and embedded system platforms.