TC428IJA Equivalent & Substitute Parts

Part Overview

The TC428IJA is a low-side gate driver IC manufactured by Microchip Technology, designed to drive N-Channel and P-Channel MOSFETs with independent channel configuration. This device operates across a 4.5V to 18V supply range and delivers 1.5A peak output current for both source and sink operations. The TC428IJA is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

TC428IJA

Microchip TechnologyIn Stock: 2891TC428IJA Datasheet

Current PartRFQ

TSC428MJA/883B

Analog Devices Inc./Maxim IntegratedIn Stock: 941TSC428MJA/883B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC428IJA is determined by strict equivalence across the following critical parameters:

• Driven Configuration: Low-Side operation only
• Number of Drivers: Exactly 2 independent channels
• Gate Type: Support for both N-Channel and P-Channel MOSFETs
• Voltage Supply Range: 4.5V to 18V minimum
• Peak Output Current: 1.5A source and sink capability
• Input Type: Inverting and Non-Inverting configurations
• Package: 8-CDIP (0.300", 7.62mm) form factor
• Channel Type: Independent channel architecture

The TSC428MJA/883B meets all these electrical and mechanical requirements, establishing it as a direct functional equivalent despite differences in product status and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The TSC428MJA/883B qualifies as a direct substitute for the TC428IJA based on electrical and mechanical parameter equivalence. The substitute part maintains identical supply voltage range, output current specifications, input logic levels, and package form factor.

Key distinctions between the parts are:

• Product Status: The TSC428MJA/883B is active production, whereas the TC428IJA is obsolete. This makes the substitute the appropriate choice for new designs and long-term system support.
• Operating Temperature Range: The substitute extends the operating range to -55°C to 125°C, providing broader environmental capability compared to the original part's -25°C to 85°C range.
• Switching Speed: The TSC428MJA/883B exhibits faster rise and fall times (25ns versus 30ns), which may provide marginal performance benefits in high-frequency switching applications.
• Compliance: The TC428IJA is RoHS3 compliant, while the TSC428MJA/883B is RoHS non-compliant. System compliance requirements must be evaluated during selection.
• Military Qualification: The TSC428MJA/883B carries MIL-STD-883 qualification, suitable for applications requiring military-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can the TSC428MJA/883B directly replace the TC428IJA in existing designs?

A: Yes. Both parts share identical electrical specifications for supply voltage (4.5V–18V), peak output current (1.5A source/sink), logic thresholds (0.8V/2.4V), and package form factor (8-CDIP). Pin-to-pin compatibility and functional equivalence are established.

Q: What is the significance of the faster switching times in the TSC428MJA/883B?

A: The substitute part exhibits 25ns rise/fall times compared to 30ns in the original. This 5ns improvement may reduce switching losses and EMI in high-frequency gate drive applications, though the difference is marginal for most standard MOSFET switching frequencies.

Q: Does the extended operating temperature range of the TSC428MJA/883B affect circuit design?

A: The substitute's -55°C to 125°C range provides broader environmental coverage than the original's -25°C to 85°C specification. This does not require design changes; it simply permits operation in more extreme conditions if needed.

Q: Are there compliance implications when substituting the TC428IJA with the TSC428MJA/883B?

A: Yes. The original part is RoHS3 compliant; the substitute is RoHS non-compliant. Systems subject to RoHS directives must verify compliance requirements before substitution. The substitute carries MIL-STD-883 qualification, which may be advantageous for military or aerospace applications.

Q: Is the 8-CDIP package identical between both parts?

A: Yes. Both parts use the 8-CDIP (0.300", 7.62mm) through-hole package with identical pinout and mechanical dimensions, ensuring direct PCB compatibility.

Q: What inventory considerations apply to this substitution?

A: The TC428IJA has 2,813 pieces in stock as new original inventory. The TSC428MJA/883B has 868 pieces available. Given the obsolete status of the original part, the active production status of the substitute makes it the recommended long-term sourcing option.