74HCT157N,652 Equivalent & Substitute Parts

Part Overview

The 74HCT157N,652 is a 4 x 2:1 multiplexer logic integrated circuit manufactured by NXP USA Inc. in a 16-DIP through-hole package. This part operates on a single 4.5V to 5.5V supply with output drive capability of 4mA (high and low). The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional category.

Substiute Parts

74HCT157N,652

NXP USA Inc.In Stock: 72574HCT157N,652 Datasheet

Current PartRFQ

SN74HCT157N

Texas InstrumentsIn Stock: 3317SN74HCT157N Datasheet

DirectRFQ

CD74HCT157E

Harris CorporationIn Stock: 2305CD74HCT157E Datasheet

MFR RecommendedRFQ

CD74HCT258E

Harris CorporationIn Stock: 2857CD74HCT258E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT157N,652 is determined by the following critical parameters:

• Circuit configuration (4 x 2:1 multiplexer function)
• Package type (16-DIP through-hole)
• Voltage supply range (4.5V ~ 5.5V)
• Mounting compatibility (through-hole)
• Output drive current capability (minimum 4mA)

Substitute parts must maintain identical or superior electrical performance within these constraints. The 74HCT series base product number indicates functional equivalence across manufacturers. Parts listed below satisfy the core substitution criteria based on matching circuit topology, package form factor, and electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

SN74HCT157N (Texas Instruments) is the primary active substitute. This part maintains full functional equivalence with superior output drive current (6mA vs. 4mA), ensuring enhanced signal integrity in applications with higher capacitive loads. The part is currently in active production status with ROHS3 compliance. Operating temperature range is limited to -40°C ~ 85°C, which is acceptable for most commercial and industrial applications within the original -40°C specification floor.

CD74HCT157E (Harris Corporation) provides an alternative with matched output drive current (4mA) and extended operating temperature range (-55°C ~ 125°C), matching the original part's upper temperature limit. This part is obsolete and RoHS non-compliant, making it suitable only for legacy system maintenance where compliance requirements do not apply.

CD74HCT258E (Harris Corporation) offers increased output drive current (6mA) and extended temperature range (-55°C ~ 125°C). This part is obsolete and RoHS non-compliant, applicable only for legacy applications where environmental compliance is not mandated.

For new designs and systems requiring current production availability and regulatory compliance, SN74HCT157N is the recommended selection.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT157N replace 74HCT157N,652 in all applications?

A: Yes, for applications operating within -40°C to 85°C. The SN74HCT157N provides superior output drive current (6mA vs. 4mA), ensuring compatibility. Applications requiring operation above 85°C must use CD74HCT157E or CD74HCT258E.

Q: What is the significance of the 4mA vs. 6mA output current difference?

A: Output current determines the maximum capacitive load the multiplexer can drive. Higher current (6mA) supports larger loads with faster switching times. The 4mA specification of the original part is met or exceeded by all substitutes, ensuring functional compatibility.

Q: Are all substitute parts pin-compatible with the original 74HCT157N,652?

A: Yes. All listed substitutes use the 16-DIP package with identical pin assignments, enabling direct socket replacement without circuit modification.

Q: Why is the operating temperature range different between substitutes?

A: Temperature range reflects manufacturing process and qualification testing performed by each manufacturer. The original part and CD74HCT157E/CD74HCT258E support -55°C to 125°C, while SN74HCT157N supports -40°C to 85°C. Selection depends on system thermal requirements.

Q: What is the difference between CD74HCT157E and CD74HCT258E?

A: Both are Harris Corporation parts with identical temperature range (-55°C ~ 125°C) and package. The primary difference is output drive current: CD74HCT157E provides 4mA (matching the original), while CD74HCT258E provides 6mA (enhanced drive capability).

Q: Are RoHS compliance differences important for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many regulated markets. SN74HCT157N meets this requirement. CD74HCT157E and CD74HCT258E are RoHS non-compliant and suitable only for legacy systems or markets without RoHS mandates.