SN74HC20DBRE4 Equivalent & Substitute Parts

Part Overview

The SN74HC20DBRE4 is a dual 4-input NAND gate logic IC manufactured by Texas Instruments in a 14-SSOP surface mount package. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 74HC20 logic family provides standard NAND gate functionality across the 2V to 6V supply voltage range with consistent electrical performance characteristics.

Substiute Parts

SN74HC20DBRE4

Texas InstrumentsIn Stock: 1143SN74HC20DBRE4 Datasheet

Current PartRFQ

SN74HC20NSR

Texas InstrumentsIn Stock: 3750SN74HC20NSR Datasheet

MFR RecommendedRFQ

74HC20PW,118

NXP USA Inc.In Stock: 5360374HC20PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC20DBRE4 is determined by the following critical parameters:

• Logic Function: Dual 4-input NAND gate configuration
• Electrical Specifications: Supply voltage range (2V ~ 6V), quiescent current (2 µA max), output current (5.2mA), input logic levels, and propagation delay characteristics
• Mounting Technology: Surface mount packages only
• Base Product Number: 74HC20 series compatibility
• Compliance: RoHS3 compliance and MSL rating

Substitute parts must maintain identical logic function, electrical performance within specified tolerances, and surface mount compatibility. Package form factors may vary (SSOP, SO, TSSOP) provided pin configuration and electrical characteristics remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

SN74HC20NSR is the manufacturer-recommended substitute from Texas Instruments. This part maintains active product status, identical electrical specifications, and ROHS3 compliance with MSL 1 rating. The 14-SOIC package provides equivalent pin spacing (0.209", 5.30mm width) to the original SSOP package, enabling direct board-level substitution with minimal layout modification.

74HC20PW,118 from NXP USA Inc. is an alternative substitute with active product status. This part offers improved propagation delay performance (15ns versus 19ns at 6V, 50pF) and extended operating temperature range (-40°C ~ 125°C). The 14-TSSOP package features reduced width (0.173", 4.40mm) compared to the original package, requiring PCB layout adjustment for implementation.

Both substitute parts maintain the core 74HC20 logic function and electrical compatibility within the specified parameter ranges. Selection between substitutes depends on package footprint compatibility with existing PCB designs and temperature operating requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74HC20NSR directly replace SN74HC20DBRE4 on existing PCBs?

A: The SN74HC20NSR uses a 14-SOIC package versus the original 14-SSOP package. Both packages maintain identical pin spacing (0.209", 5.30mm width) and pin configuration, allowing direct substitution with compatible footprints. PCB layout verification is required to confirm package compatibility.

Q: What are the key differences between the two substitute parts?

A: SN74HC20NSR maintains identical specifications to the original part with active product status. The 74HC20PW,118 offers faster propagation delay (15ns versus 19ns) and extended temperature range (-40°C ~ 125°C versus -40°C ~ 85°C), but uses a narrower 14-TSSOP package (0.173" width) requiring PCB redesign.

Q: Are both substitute parts RoHS compliant?

A: SN74HC20NSR is ROHS3 compliant with MSL 1 rating. RoHS compliance status for 74HC20PW,118 is not specified in the provided data.

Q: Which substitute should be selected for new designs?

A: Selection depends on application requirements. For direct board replacement with minimal changes, use SN74HC20NSR. For applications requiring extended temperature operation or improved speed performance, evaluate 74HC20PW,118 with consideration for package footprint changes.

Q: Do the substitute parts maintain the same logic function and electrical performance?

A: Both substitutes maintain identical NAND gate logic function with 2 channels and 4 inputs per channel. Electrical specifications including supply voltage (2V ~ 6V), quiescent current (2 µA), output current (5.2mA), and input logic levels are equivalent across all three parts.