74LVC38APW,112 Equivalent & Substitute Parts

Part Overview

The 74LVC38APW,112 is a NAND Gate IC featuring 4 channels with 2 inputs per channel and open drain output configuration in a 14-TSSOP surface mount package. Manufactured by NXP USA Inc., this component operates across a wide supply voltage range of 1.2V to 5.5V and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for ongoing design support and procurement continuity.

Substiute Parts

74LVC38APW,112

NXP USA Inc.In Stock: 76874LVC38APW,112 Datasheet

Current PartRFQ

74LCX38MTC

Fairchild SemiconductorIn Stock: 182974LCX38MTC Datasheet

MFR RecommendedRFQ

74LCX38MTCX

Fairchild SemiconductorIn Stock: 473374LCX38MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVC38APW,112 is determined by the following critical parameters:

• Logic configuration: 4-channel NAND gate with 2 inputs per channel
• Output type: Open drain configuration
• Package type: 14-TSSOP surface mount
• Input logic levels: 0.7V ~ 0.8V (low), 1.7V ~ 2V (high)
• Supply voltage compatibility: Minimum overlap requirement at 3.3V operation
• Output current capability: Minimum 24mA sink current
• Propagation delay: Maximum acceptable delay for timing-critical applications

The identified substitutes (74LCX38MTC and 74LCX38MTCX) maintain identical logic configuration, package format, and input logic thresholds. Both are manufactured by Fairchild Semiconductor and carry active product status, ensuring long-term availability and support.

Parameter Comparison

Engineering Selection Recommendations

Both 74LCX38MTC and 74LCX38MTCX are active products from Fairchild Semiconductor, providing superior long-term availability compared to the obsolete 74LVC38APW,112. The 74LCX38MTCX is the preferred substitute, offering complete parameter specification alignment including identical package dimensions, matching input logic thresholds, and confirmed open drain output capability at 24mA minimum sink current.

The 74LCX38MTCX operates within a narrower supply voltage range (2V ~ 3.6V) compared to the original part (1.2V ~ 5.5V). Applications requiring operation below 2V or above 3.6V must evaluate this constraint against system requirements. The 74LCX38MTCX exhibits lower quiescent current (10 µA versus 40 µA) and slightly increased propagation delay (5ns versus 2.3ns at 3.3V, 50pF), both acceptable trade-offs for most standard logic applications.

The 74LCX38MTC is listed as an alternative; however, incomplete parameter documentation limits its direct comparison. Selection should prioritize 74LCX38MTCX where full specification data is required for design validation.

Frequently Asked Questions (FAQ)

Q: Can the 74LCX38MTCX directly replace the 74LVC38APW,112 in existing designs?

A: Direct replacement is possible for applications operating at 3.3V with standard logic timing requirements. The 14-TSSOP package dimensions are identical, and input/output logic levels are compatible. However, verify that your application does not require supply voltages below 2V or above 3.6V, and confirm that the 5ns propagation delay (versus 2.3ns) meets timing constraints.

Q: What is the significance of the open drain output feature?

A: Open drain output requires external pull-up resistors to establish high logic levels. Both the original and substitute parts maintain this configuration, ensuring circuit compatibility. Pull-up resistor values and supply voltage selection must account for the output current rating (24mA minimum for 74LCX38MTCX).

Q: Why is the 74LVC38APW,112 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. The 74LCX38 series from Fairchild Semiconductor provides equivalent functionality with active product status, ensuring ongoing availability and technical support.

Q: Are there any compliance or certification differences between the original and substitute parts?

A: The 74LVC38APW,112 is ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity). Complete compliance documentation for the 74LCX38MTCX should be verified with the manufacturer or authorized distributor to confirm equivalent environmental and regulatory certifications.

Q: How do quiescent current differences affect system design?

A: The 74LCX38MTCX draws 10 µA maximum quiescent current compared to 40 µA for the original part. This 4:1 reduction benefits low-power applications but is negligible in standard industrial or consumer applications where logic gate current consumption is typically minor relative to overall system power draw.