CD74HCT390MT Equivalent & Substitute Parts

Part Overview

The CD74HCT390MT is a decade counter logic IC manufactured by Texas Instruments, featuring dual 4-bit negative edge-triggered counters in a 16-SOIC surface mount package. This component is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain resilience for applications requiring decade counter functionality with the specified electrical and mechanical characteristics.

Substiute Parts

CD74HCT390MT

Texas InstrumentsIn Stock: 1508CD74HCT390MT Datasheet

Current PartRFQ

CD74HCT390M96

Texas InstrumentsIn Stock: 1406CD74HCT390M96 Datasheet

Parametric EquivalentRFQ

74HCT390D,653

Nexperia USA Inc.In Stock: 336474HCT390D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HCT390MT is determined by strict equivalence across the following critical parameters:

• Logic Type: Counter, Decade (2 Element, 4 Bit configuration)
• Trigger Type: Negative Edge
• Reset: Asynchronous
• Voltage Supply Range: 4.5 V ~ 5.5 V
• Package / Case: 16-SOIC form factor
• Mounting Type: Surface Mount
• RoHS and environmental compliance status

Substitute parts must maintain identical functional specifications and package dimensions to ensure direct replacement capability without circuit redesign or PCB modification.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT390M96 (Parametric Equivalent): This Texas Instruments part maintains identical electrical specifications and package configuration to the CD74HCT390MT. Active product status ensures ongoing availability and supply continuity. Selection of this part preserves all design parameters without modification.

74HCT390D,653 (MFR Recommended): This Nexperia USA Inc. part provides functional equivalence with the same decade counter architecture and 16-SOIC package. The part features an elevated count rate specification of 55 MHz compared to 27 MHz for the main part, and a reduced operating temperature minimum of -40°C versus -55°C. Both parts maintain ROHS3 compliance and identical supply voltage specifications. This part is recommended where the reduced temperature range and higher count rate capability are acceptable for the application.

Both substitute parts are ROHS3 compliant and carry MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT390M96 be used as a direct replacement for CD74HCT390MT?

A: Yes. Both parts share identical logic type, element count, bit configuration, trigger type, reset mechanism, supply voltage range, operating temperature range, and 16-SOIC package dimensions. Direct substitution is supported without circuit modification.

Q: What is the difference between CD74HCT390M96 and 74HCT390D,653?

A: Both are functional equivalents with identical core counter specifications. The 74HCT390D,653 features a higher count rate (55 MHz versus 27 MHz) and a narrower operating temperature range (-40°C to 125°C versus -55°C to 125°C). Selection depends on application temperature requirements and performance headroom.

Q: Are all substitute parts in the same package?

A: Yes. All three parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package, enabling direct PCB placement without modification.

Q: What is the significance of the CD74HCT390MT being Last Time Buy?

A: Last Time Buy status indicates this part will not be manufactured beyond a specified date. Transition to an active substitute part such as CD74HCT390M96 or 74HCT390D,653 is recommended for long-term design continuity.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and environmental requirements.