74LVC38ADB,118 Equivalent & Substitute Parts

Part Overview

The 74LVC38ADB,118 is a NAND Gate IC featuring 4 channels with 2 inputs per channel and open drain output configuration in a 14-SSOP 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

74LVC38ADB,118

NXP USA Inc.In Stock: 91074LVC38ADB,118 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 for the 74LVC38ADB,118 is determined by the following critical parameters:

• Logic function: 4-channel NAND gate with 2 inputs per channel
• Output configuration: Open drain topology
• Input/output logic levels: Low 0.7V ~ 0.8V, High 1.7V ~ 2V
• Mounting type: Surface mount
• Package compatibility: 14-pin SSOP or TSSOP variants

The substitute parts identified (74LCX38MTC and 74LCX38MTCX) maintain the core logic function and open drain output configuration. Both are manufactured by Fairchild Semiconductor and carry active product status. The 74LCX38MTCX variant uses a 14-TSSOP package, which differs physically from the original 14-SSOP but maintains electrical compatibility within the specified logic levels and timing parameters.

Parameter Comparison

Engineering Selection Recommendations

The 74LVC38ADB,118 is classified as obsolete, making the identification of active alternatives critical for design continuity. Both substitute parts carry active product status from Fairchild Semiconductor, ensuring long-term availability and supply chain stability.

The 74LCX38MTCX is the primary recommended substitute. It maintains the core NAND gate logic function with 4 channels and 2 inputs per channel, preserves the open drain output configuration, and matches the input logic levels (Low 0.7V ~ 0.8V, High 1.7V ~ 2V) of the original part. The 74LCX38MTCX operates within a narrower supply voltage range (2V ~ 3.6V) compared to the original (1.2V ~ 5.5V), exhibits lower quiescent current (10 µA vs. 40 µA), and reduced output current capability (24mA vs. 32mA). The propagation delay is slightly longer at 5ns versus 2.3ns at 3.3V with 50pF load. The operating temperature range is reduced to -40°C ~ 85°C. The package differs from the original 14-SSOP, using a 14-TSSOP form factor with a narrower width (4.40mm vs. 5.30mm).

The 74LCX38MTC is an alternative substitute with active status, though detailed electrical specifications are not provided in the available data.

Both substitutes comply with ROHS3 and carry identical ECCN and HTSUS classifications as the original part.

Frequently Asked Questions (FAQ)

Q: Can the 74LCX38MTCX directly replace the 74LVC38ADB,118 in existing designs?

A: Electrical compatibility is maintained for the core logic function and input/output levels. However, the narrower supply voltage range (2V ~ 3.6V vs. 1.2V ~ 5.5V) and reduced operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C) must be evaluated against your application requirements. The package change from 14-SSOP to 14-TSSOP requires PCB layout modification.

Q: What are the key differences in electrical performance?

A: The 74LCX38MTCX exhibits lower quiescent current (10 µA vs. 40 µA), reduced output current capability (24mA vs. 32mA), and longer propagation delay (5ns vs. 2.3ns at 3.3V, 50pF). These differences may impact power consumption and timing-critical applications.

Q: Are there package compatibility considerations?

A: Yes. The original 74LVC38ADB,118 uses a 14-SSOP package (5.30mm width), while the 74LCX38MTCX uses a 14-TSSOP package (4.40mm width). Both are 14-pin surface mount packages, but PCB footprint and layout modifications are required.

Q: What is the supply voltage limitation of the substitute?

A: The 74LCX38MTCX operates within 2V ~ 3.6V, which is narrower than the original 1.2V ~ 5.5V range. Applications requiring operation below 2V or above 3.6V cannot use this substitute without design modification.

Q: Are the substitute parts RoHS compliant?

A: Yes. The 74LCX38MTCX is ROHS3 compliant and carries the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications as the original part.