MC74ACT05MELG Equivalent & Substitute Parts

Part Overview

The MC74ACT05MELG is a 6-channel inverter IC with open drain output configuration, manufactured by onsemi in SOEIAJ-14 surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates within the 74ACT logic family standard, providing TTL-compatible inverter functionality with open drain outputs suitable for bus-line applications and multi-source configurations.

Substiute Parts

MC74ACT05MELG

onsemiIn Stock: 1128MC74ACT05MELG Datasheet

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MC74ACT05DR2G

onsemiIn Stock: 8493MC74ACT05DR2G Datasheet

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CD74ACT05M

Texas InstrumentsIn Stock: 2020CD74ACT05M Datasheet

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CD74ACT05M96

Texas InstrumentsIn Stock: 3706CD74ACT05M96 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MC74ACT05MELG are qualified based on the following criteria:

Core Functional Parameters (Must Match):

• Logic Type: Inverter
• Number of Circuits: 6
• Number of Inputs: 1
• Features: Open Drain
• Voltage - Supply: 4.5V ~ 5.5V
• Current - Output High, Low: -, 24mA
• Input Logic Level - Low: 0.8V
• Input Logic Level - High: 2V
• Base Product Number: 74ACT05

Allowable Variations:

• Propagation Delay: Up to 10.8ns @ 5V, 50pF (main part: 8.5ns)
• Operating Temperature: Extended range acceptable (-55°C ~ 125°C)
• Package dimensions: 14-SOIC variants with different widths (0.209" or 0.154")
• Moisture Sensitivity Level: 1 or 3
• Product Status: Active or Discontinued

All substitute parts maintain electrical equivalence within the 74ACT logic family standard and are compatible with the same circuit applications as the MC74ACT05MELG.

Parameter Comparison

Engineering Selection Recommendations

MC74ACT05DR2G (onsemi) is the primary substitute for the MC74ACT05MELG. Both parts are manufactured by onsemi within the same product line, share identical electrical specifications, and maintain the same operating temperature range. The MC74ACT05DR2G is currently in active production status with higher inventory availability. The primary difference is package width (0.154" versus 0.209"), which requires PCB layout verification for mechanical compatibility. This part offers ROHS3 compliance and improved moisture sensitivity rating (MSL 1).

CD74ACT05M96 (Texas Instruments) provides an alternative from a different manufacturer with active product status. This part meets all functional requirements and offers extended operating temperature range (-55°C ~ 125°C). The propagation delay specification is slightly higher (10.8ns versus 8.5ns), which is acceptable for most applications. ROHS3 compliance and MSL 1 rating provide superior environmental performance. Package dimensions match the MC74ACT05DR2G variant.

CD74ACT05M (Texas Instruments) is electrically equivalent but carries discontinued status at DiGi Electronics, limiting long-term availability for production use. This part shares specifications with CD74ACT05M96 but is packaged in tube format rather than cut tape.

For new designs and production continuity, MC74ACT05DR2G or CD74ACT05M96 are recommended based on supply chain availability and manufacturing location preference.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT05DR2G directly replace MC74ACT05MELG without circuit modification?

A: Electrical substitution is direct. The primary consideration is package width difference (0.154" versus 0.209"). PCB footprint verification is required to confirm mechanical compatibility with existing board layouts. Pin configuration and electrical characteristics are identical.

Q: What is the significance of the propagation delay difference between MC74ACT05MELG (8.5ns) and CD74ACT05M96 (10.8ns)?

A: The 2.3ns difference falls within acceptable timing margins for most TTL-compatible applications. Applications with critical timing requirements below 10.8ns should retain the MC74ACT05DR2G or verify timing compatibility through circuit simulation.

Q: Why does CD74ACT05M96 have an extended operating temperature range (-55°C ~ 125°C) compared to MC74ACT05MELG (-40°C ~ 85°C)?

A: Extended temperature range is a design characteristic of the Texas Instruments product line. This provides additional margin for applications in extreme environments but does not affect compatibility in standard operating conditions.

Q: What does MSL 1 (Unlimited) versus MSL 3 (168 Hours) mean for component handling?

A: MSL 3 requires storage in controlled humidity conditions and limits shelf life to 168 hours after moisture exposure. MSL 1 has unlimited shelf life under standard storage conditions. Substitute parts with MSL 1 offer simplified inventory management and reduced risk of moisture-related failures.

Q: Are all substitute parts ROHS3 compliant?

A: MC74ACT05DR2G and both Texas Instruments parts (CD74ACT05M, CD74ACT05M96) are ROHS3 compliant. The original MC74ACT05MELG is listed as REACH Unaffected. Compliance verification with specific procurement requirements is recommended.

Q: Which substitute part offers the best long-term availability?

A: MC74ACT05DR2G (onsemi) and CD74ACT05M96 (Texas Instruments) both carry active product status. MC74ACT05DR2G shows higher current inventory (8410 pcs) compared to CD74ACT05M96 (3602 pcs), indicating stronger near-term availability.