74HCT03DB,118 Equivalent & Substitute Parts

Part Overview

The 74HCT03DB,118 is a NAND Gate IC featuring 4 channels with 2 inputs per channel in a 14-SSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates within the 4.5V to 5.5V supply voltage range with open drain output configuration, suitable for logic-level switching applications requiring low quiescent current and moderate propagation delay characteristics.

Substiute Parts

74HCT03DB,118

Nexperia USA Inc.In Stock: 112474HCT03DB,118 Datasheet

Current PartRFQ

74HCT03PW,118

NXP USA Inc.In Stock: 1117774HCT03PW,118 Datasheet

SimilarRFQ

74AC11032DBR

Texas InstrumentsIn Stock: 152274AC11032DBR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT03DB,118 is determined by the following critical parameters:

Primary Substitution Criteria:

• Logic Type: NAND Gate function
• Number of Circuits: 4 channels
• Number of Inputs: 2 inputs per channel
• Features: Open Drain output configuration
• Voltage - Supply: 4.5V ~ 5.5V compatibility
• Current - Output Low: 4mA capability
• Input Logic Levels: 0.8V (Low), 2V (High) threshold compatibility
• Max Propagation Delay: 24ns @ 4.5V, 50pF
• Operating Temperature: -40°C ~ 125°C range
• Mounting Type: Surface Mount
• Package compatibility: 14-pin SSOP or equivalent footprint

Substitute Parts Identified:

1. 74HCT03PW,118 (NXP USA Inc.) - Direct functional equivalent with package variation (14-TSSOP vs. 14-SSOP)
2. 74AC11032DBR (Texas Instruments) - Logic function variation with different electrical characteristics and package size

Parameter Comparison

Engineering Selection Recommendations

74HCT03PW,118 (Primary Substitute): This part maintains identical electrical specifications and logic function as the main part. The substitution is valid based on matching NAND gate configuration, 4-channel 2-input topology, open drain output, identical supply voltage range (4.5V ~ 5.5V), matching quiescent current (2 µA), identical output current capability (4mA), matching input logic levels, and equivalent propagation delay (24ns @ 4.5V, 50pF). The package differs (14-TSSOP vs. 14-TSSOP), requiring PCB footprint verification. Product status is Active, ensuring long-term availability. RoHS3 compliance is maintained.

74AC11032DBR (Secondary Substitute): This part differs in logic function (OR Gate vs. NAND Gate), requiring circuit-level functional verification before substitution. Additional differences include expanded supply voltage range (3V ~ 5.5V), higher quiescent current (4 µA), significantly higher output current capability (24mA vs. 4mA), different input logic level thresholds, faster propagation delay (6.2ns @ 5V), narrower operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C), and different package size (16-SSOP vs. 14-SSOP). Product status is Active. RoHS3 compliance is maintained. This substitute is applicable only when OR gate logic function is acceptable in the circuit design.

Frequently Asked Questions (FAQ)

Q: Can 74HCT03PW,118 directly replace 74HCT03DB,118 in existing designs?

A: Electrical substitution is valid based on identical logic function, circuit count, input configuration, supply voltage range, quiescent current, output current, input logic levels, and propagation delay. Package footprint differs (14-TSSOP vs. 14-SSOP), requiring PCB layout verification to confirm mechanical compatibility with existing land patterns.

Q: What are the key differences between 74HCT03DB,118 and 74AC11032DBR?

A: The primary difference is logic function: 74HCT03DB,118 is a NAND gate while 74AC11032DBR is an OR gate. Additional differences include supply voltage range expansion, higher quiescent current, significantly higher output current capability, different input logic level thresholds, faster propagation delay, narrower operating temperature range, and different package size (16-SSOP vs. 14-SSOP). Functional circuit verification is required before substitution.

Q: Why is 74HCT03DB,118 marked as obsolete?

A: The main part is classified as obsolete by the manufacturer. Active alternatives such as 74HCT03PW,118 are available for new designs and ongoing procurement requirements.

Q: Are there package compatibility concerns with these substitutes?

A: Yes. The main part uses 14-SSOP (0.209", 5.30mm width). The 74HCT03PW,118 substitute uses 14-TSSOP (0.173", 4.40mm width), requiring footprint verification. The 74AC11032DBR uses 16-SSOP (0.209", 5.30mm width), requiring both footprint and pin assignment verification.

Q: What compliance certifications apply to these parts?

A: 74HCT03DB,118 and 74AC11032DBR are ROHS3 compliant. All parts carry REACH Unaffected status and EAR99 ECCN classification. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for the main part and 74AC11032DBR.