N74F657D,623 Equivalent & Substitute Parts

Part Overview

The N74F657D,623 is a non-inverting transceiver logic IC manufactured by NXP USA Inc., designed for 8-bit data transmission with 3-state output capability. This component operates within the 74F logic family and is rated for supply voltages between 4.5V and 5.5V with an operating temperature range of 0°C to 70°C.

The N74F657D,623 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this component.

Substiute Parts

N74F657D,623

NXP USA Inc.In Stock: 1188N74F657D,623 Datasheet

Current PartRFQ

SN74F657DW

Texas InstrumentsIn Stock: 872SN74F657DW Datasheet

DirectRFQ

SN74F543DWR

Texas InstrumentsIn Stock: 4011SN74F543DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the N74F657D,623 are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Substitute Parts Identified:

1. SN74F657DW (Texas Instruments) - Direct manufacturer equivalent with identical electrical specifications and package configuration. Product status is Active.

2. SN74F543DWR (Texas Instruments) - Parametric equivalent with matching electrical performance and package specifications. Product status is Active. Base product number differs (74F543 vs. 74F657), but all critical electrical and mechanical parameters align within acceptable substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

SN74F657DW (Texas Instruments) is the primary substitute for the N74F657D,623. This part maintains identical electrical specifications, package configuration, and operating parameters. The component is in Active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), indicating equivalent moisture handling requirements.

SN74F543DWR (Texas Instruments) serves as a parametric equivalent substitute. All critical electrical and mechanical parameters align with the original part. This component is also in Active product status with ROHS3 compliance and MSL rating of 1 (Unlimited). The difference in base product number (74F543 vs. 74F657) does not affect functional compatibility within the specified parameter constraints.

Both substitute parts are available in Active status, providing superior supply chain reliability compared to the obsolete N74F657D,623. Selection between the two substitutes should be based on packaging format requirements (Tube for SN74F657DW versus Tape & Reel for SN74F543DWR) and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SN74F657DW directly replace N74F657D,623 in existing designs?

A: Yes. The SN74F657DW maintains identical electrical specifications, package configuration (24-SOIC), mounting type (Surface Mount), and operating parameters (4.5V ~ 5.5V supply, 0°C ~ 70°C operating temperature). No design modifications are required.

Q: What is the difference between SN74F657DW and SN74F543DWR?

A: Both parts are parametric equivalents with matching electrical performance and package specifications. The primary differences are the base product number (74F657 vs. 74F543) and packaging format (Tube vs. Tape & Reel). All critical electrical and mechanical parameters are identical.

Q: Are the substitute parts compatible with the original PCB layout?

A: Yes. Both substitute parts use the identical 24-SOIC package with 0.295" width and 7.50mm dimensions. PCB footprints and land patterns require no modification.

Q: What are the compliance and certification differences?

A: All three parts (original and substitutes) are ROHS3 compliant, carry MSL rating of 1 (Unlimited), and are REACH unaffected. Compliance profiles are equivalent.

Q: Why is the N74F657D,623 classified as obsolete?

A: The N74F657D,623 is no longer in active production by NXP USA Inc. The substitute parts from Texas Instruments (SN74F657DW and SN74F543DWR) are in Active status, ensuring continued availability and support.

Q: Which substitute should be selected for new designs?

A: For new designs, either SN74F657DW or SN74F543DWR is acceptable based on the specified parameter requirements. Selection should consider packaging format preference (Tube vs. Tape & Reel) and supplier inventory availability.