74HC161D,652 Binary Counter IC Equivalent & Substitute Parts

Part Overview

The 74HC161D,652 is a 4-bit binary counter IC manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This logic component functions as a synchronous up counter with asynchronous reset, operating at a maximum count rate of 48 MHz across a supply voltage range of 2V to 6V. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

74HC161D,652

Nexperia USA Inc.In Stock: 129574HC161D,652 Datasheet

Current PartRFQ

CD74HC161M

Harris CorporationIn Stock: 12977CD74HC161M Datasheet

SimilarRFQ

CD74HC161M96

Texas InstrumentsIn Stock: 9899CD74HC161M96 Datasheet

SimilarRFQ

CD74HC161MT

Texas InstrumentsIn Stock: 1974CD74HC161MT Datasheet

SimilarRFQ

MC74HC161ADR2G

onsemiIn Stock: 10239MC74HC161ADR2G Datasheet

SimilarRFQ

SN74HC161D

Texas InstrumentsIn Stock: 3549SN74HC161D Datasheet

SimilarRFQ

SN74HC161DR

Texas InstrumentsIn Stock: 4412SN74HC161DR Datasheet

SimilarRFQ

SN74HC161DT

Texas InstrumentsIn Stock: 1856SN74HC161DT Datasheet

SimilarRFQ

SN74HC161NSR

Texas InstrumentsIn Stock: 4764SN74HC161NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC161D,652 is determined by the following core parameters:

• Base product number must be 74HC161
• Logic type: Binary Counter
• Counter configuration: 4-bit, up direction, asynchronous reset, synchronous timing
• Trigger type: Positive edge
• Supply voltage range: 2V to 6V (minimum overlap required)
• Package type: 16-SOIC or 16-SO surface mount variants
• Mounting type: Surface mount

Substitute parts are grouped by their product status and compliance certifications. Parts with active or last-time-buy status are preferred over obsolete parts. RoHS3 compliance and MSL rating of 1 indicate superior environmental and moisture handling characteristics.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the 74HC161D,652, the following selection criteria apply:

Preferred Substitutes (Active Product Status):

• SN74HC161DR (Texas Instruments): Active status with 36 MHz count rate, -40°C to 85°C operating range, ROHS3 compliant, 16-SOIC package. Suitable for new designs and long-term availability.
• CD74HC161M96 (Texas Instruments): Active status with 24 MHz count rate, -55°C to 125°C operating range, ROHS3 compliant, 16-SOIC package. Extended temperature range available.

Secondary Substitutes (Last Time Buy Status):

• SN74HC161D (Texas Instruments): Last time buy status with 36 MHz count rate, ROHS3 compliant.
• SN74HC161DT (Texas Instruments): Last time buy status with 36 MHz count rate, ROHS3 compliant, tape & reel packaging.
• MC74HC161ADR2G (onsemi): Last time buy status with 35 MHz count rate, ROHS3 compliant.

Not Recommended:

• CD74HC161M (Harris Corporation): Obsolete status and RoHS non-compliant.
• CD74HC161MT (Texas Instruments): Obsolete status.
• SN74HC161NSR (Texas Instruments): Different package width (5.30mm vs. 3.90mm) may require PCB layout modification.

All substitute parts maintain the core 74HC161 functional specification: 4-bit binary counter, asynchronous reset, synchronous timing, positive edge trigger, and 2V to 6V supply voltage compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HC161NSR as a direct replacement for 74HC161D,652? A: SN74HC161NSR is functionally equivalent but uses a 16-SO package with 5.30mm width instead of the 3.90mm 16-SOIC package. This difference may require PCB layout modifications. If package footprint compatibility is critical, use SN74HC161DR instead.

Q: What is the difference between the CD74HC161M and CD74HC161M96 variants? A: Both are 74HC161 binary counters with identical functional specifications. CD74HC161M96 is manufactured by Texas Instruments and maintains active product status with ROHS3 compliance, while CD74HC161M is a Harris Corporation part with obsolete status and RoHS non-compliance. CD74HC161M96 is the preferred choice for new applications.

Q: Does the 48 MHz count rate of the original 74HC161D,652 affect substitute selection? A: The original part's 48 MHz specification is higher than most substitutes (24-36 MHz). For applications requiring maximum count rate performance, SN74HC161DR or SN74HC161D (36 MHz) provide the closest performance match. If your circuit operates below 36 MHz, all listed substitutes are functionally compatible.

Q: Are all substitute parts ROHS3 compliant? A: No. CD74HC161M (Harris Corporation) is RoHS non-compliant. All other substitutes listed are ROHS3 compliant. For applications requiring environmental compliance certification, avoid CD74HC161M.

Q: What packaging options are available for 74HC161 substitutes? A: Most substitutes are available in 16-SOIC (0.154", 3.90mm width) surface mount packages. SN74HC161NSR uses a wider 16-SO (0.209", 5.30mm width) package. Packaging variants (tube, tape & reel, cut tape) differ by manufacturer but do not affect electrical compatibility.

Q: Can I substitute based on count rate alone? A: No. While count rate is a performance parameter, all listed substitutes meet the minimum functional requirements of the 74HC161 specification. Selection should prioritize product status (active preferred), compliance certifications (ROHS3), and package compatibility with your PCB design.