ZXFBF08W20TC Equivalent & Substitute Parts

Part Overview

The ZXFBF08W20TC is an octal buffer amplifier manufactured by Diodes Incorporated, designed for high-speed signal buffering applications requiring 100 MHz bandwidth. This linear amplifier integrates eight independent buffer circuits in a 20-SOIC surface mount package. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning. Substitute parts must maintain compatibility with the original electrical specifications and physical packaging requirements.

Substiute Parts

ZXFBF08W20TC

Diodes IncorporatedIn Stock: 790ZXFBF08W20TC Datasheet

Current PartRFQ

MM74HCT244WM

Fairchild SemiconductorIn Stock: 2380MM74HCT244WM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZXFBF08W20TC is determined by the following critical parameters:

Physical Compatibility:

• Package type: 20-SOIC form factor with 0.295" (7.50mm) width
• Mounting type: Surface mount technology

Functional Compatibility:

• Buffer amplifier topology with multiple independent circuits
• High-frequency signal conditioning capability
• Output drive capability suitable for signal distribution

Electrical Operating Range:

• Bandwidth performance at or above 100 MHz
• Supply current and output current specifications
• Input bias current and offset voltage characteristics
• Operating temperature range encompassing the original specification

The MM74HCT244WM qualifies as a substitute based on identical physical packaging (20-SOIC), buffer amplifier function, and compatible electrical operating characteristics within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The ZXFBF08W20TC is classified as obsolete, necessitating alternative sourcing for new designs or production continuity. The MM74HCT244WM maintains active product status with established supply chains and manufacturing support.

Compliance and Certification: The original part carries RoHS non-compliant designation. Designers implementing the MM74HCT244WM substitute should verify RoHS compliance requirements for their specific application and regulatory jurisdiction, as this information is not provided in the substitute part specification.

Package Compatibility: Both devices utilize identical 20-SOIC surface mount packaging, ensuring direct physical compatibility on printed circuit boards without layout modifications.

Functional Equivalence: Both parts function as buffer amplifiers in the 20-SOIC package. The MM74HCT244WM provides 3-state output capability, which may offer additional design flexibility for bus-oriented applications compared to the original part specification.

Operating Temperature: The MM74HCT244WM operating range (-40°C ~ 85°C) extends beyond the original specification (0°C ~ 70°C), providing broader environmental coverage for industrial and extended-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the MM74HCT244WM directly replace the ZXFBF08W20TC in existing designs?

A: Physical package compatibility is confirmed (both 20-SOIC). Functional compatibility exists as both are buffer amplifiers. However, circuit-level validation is required to confirm electrical parameter alignment with your specific application requirements, particularly regarding output current drive capability and supply voltage specifications.

Q: What are the key differences between these two parts?

A: The ZXFBF08W20TC is a linear buffer amplifier with eight independent circuits, while the MM74HCT244WM is a logic-level buffer with two elements of four bits each and 3-state output capability. The MM74HCT244WM operates at logic supply voltages (4.5V ~ 5.5V) and provides output current of 7.2 mA, compared to the original part's 9 mA per channel specification.

Q: Is the 20-SOIC package identical between both parts?

A: Yes. Both devices use the 20-SOIC package with 0.295" (7.50mm) width, ensuring identical footprint and pin spacing for direct board-level substitution without layout redesign.

Q: What should I verify before implementing the MM74HCT244WM as a substitute?

A: Verify that your circuit design accommodates the logic-level supply voltage range (4.5V ~ 5.5V) of the MM74HCT244WM. Confirm that the 3-state output functionality is compatible with your application. Validate that the 7.2 mA output current specification meets your load requirements. Review RoHS compliance status if regulatory compliance is a design requirement.

Q: Why is the original ZXFBF08W20TC obsolete?

A: Product obsolescence is determined by the manufacturer and typically reflects discontinuation of production lines. The Diodes Incorporated ZXFBF08W20TC has been superseded in the manufacturer's product portfolio, making the MM74HCT244WM a viable alternative for ongoing applications.

Q: Are there inventory considerations for these parts?

A: The ZXFBF08W20TC has 682 pieces available as new original stock. The MM74HCT244WM has 2300 pieces available, providing greater supply availability for new production requirements or design transitions.