CD74HC161M Equivalent & Substitute Parts

Part Overview

The CD74HC161M is a 4-bit binary counter logic IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component functions as a synchronous counter with asynchronous reset, operating at a maximum count rate of 24 MHz across a supply voltage range of 2V to 6V. The part is currently in Last Time Buy status, indicating limited availability and the necessity to identify functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

CD74HC161M

Texas InstrumentsIn Stock: 1313CD74HC161M Datasheet

Current PartRFQ

CD74HC161M96

Texas InstrumentsIn Stock: 9899CD74HC161M96 Datasheet

MFR RecommendedRFQ

74HC161D,652

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

MFR RecommendedRFQ

74HC161D,653

Nexperia USA Inc.In Stock: 1429574HC161D,653 Datasheet

MFR RecommendedRFQ

MC74HC161ADG

onsemiIn Stock: 2109MC74HC161ADG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC161M is determined by strict equivalence across the following critical parameters:

• Logic Type: Binary Counter (4-bit, up-counting)
• Reset Configuration: Asynchronous reset capability
• Timing Architecture: Synchronous operation
• Trigger Mechanism: Positive edge triggering
• Package Compatibility: 16-SOIC surface mount form factor
• Supply Voltage Range: 2V to 6V operation
• RoHS Compliance: ROHS3 Compliant status

Parts meeting these criteria are considered direct functional equivalents. Count rate specifications may vary between manufacturers while maintaining compatibility with the base 74HC161 logic family. Operating temperature ranges and product status are documented for procurement and lifecycle planning purposes.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production continuity, CD74HC161M96 is the primary substitute. This part maintains Texas Instruments manufacturing continuity with Active product status, ensuring long-term availability. The packaging format (Cut Tape & Digi-Reel) supports automated assembly processes, and inventory levels (9813 units) provide supply security.

For applications requiring extended temperature operation (-55°C to 125°C), CD74HC161M96 maintains the original temperature specification. The 24 MHz count rate specification is preserved across both Texas Instruments variants.

74HC161D,653 (Nexperia) represents an alternative from an established logic IC manufacturer with Active status and the highest available inventory (14278 units). This part operates at 48 MHz, exceeding the original specification, and supports the full -40°C to 125°C range. Tape & Reel packaging is optimized for high-volume production.

MC74HC161ADG (onsemi) is functionally equivalent but operates within a narrower temperature range (-40°C to 85°C) and has Last Time Buy status, limiting its suitability for long-term procurement strategies.

Parts with Obsolete status (74HC161D,652) should not be selected for new designs despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can CD74HC161M96 be used as a direct replacement for CD74HC161M?

A: Yes. Both parts are manufactured by Texas Instruments, share identical logic specifications (4-bit binary counter, asynchronous reset, synchronous timing, positive edge trigger), operate across 2V to 6V supply voltage, and use the 16-SOIC package. CD74HC161M96 is Active status, providing superior long-term availability compared to the Last Time Buy status of CD74HC161M.

Q: What is the difference between the Nexperia parts 74HC161D,652 and 74HC161D,653?

A: Both parts are functionally equivalent 4-bit binary counters from Nexperia with identical electrical specifications (48 MHz count rate, -40°C to 125°C operating range, 16-SOIC package). The primary difference is product status: 74HC161D,652 is Obsolete, while 74HC161D,653 is Active. Additionally, 74HC161D,653 is supplied in Tape & Reel format, supporting automated assembly, whereas 74HC161D,652 is supplied in Tube format.

Q: Are there temperature range limitations when substituting with MC74HC161ADG?

A: Yes. MC74HC161ADG operates within -40°C to 85°C, which is narrower than the original CD74HC161M specification of -55°C to 125°C. Applications requiring operation below -40°C or above 85°C are not compatible with this substitute.

Q: How do count rate differences affect substitution?

A: Count rate specifications (24 MHz for Texas Instruments variants, 48 MHz for Nexperia, 35 MHz for onsemi) represent maximum operating frequencies. All substitute parts exceed or match the original 24 MHz specification, ensuring compatibility with existing timing requirements. Higher count rates do not create incompatibility; they indicate enhanced performance capability.

Q: Which substitute offers the best procurement security?

A: 74HC161D,653 provides the highest inventory availability (14278 units) and Active product status, ensuring sustained supply. CD74HC161M96 offers the second-best security with 9813 units in stock and Active status, while maintaining Texas Instruments manufacturing continuity.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 Compliant status, matching the original CD74HC161M certification.