74LVC161DB,112 Binary Counter IC - Equivalent & Substitute Parts

Part Overview

The 74LVC161DB,112 is a 4-bit binary counter IC manufactured by Nexperia USA Inc., classified as a logic component in the 74LVC series. This device functions as a synchronous binary counter with asynchronous reset, designed for positive edge triggering applications. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The 16-SSOP surface mount package and specified electrical parameters define the scope for equivalent part selection.

Substiute Parts

74LVC161DB,112

Nexperia USA Inc.In Stock: 115374LVC161DB,112 Datasheet

Current PartRFQ

SN74LV161ADBR

Texas InstrumentsIn Stock: 3394SN74LV161ADBR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LVC161DB,112 is determined by the following critical parameters:

Functional Requirements:

• Logic type: Binary counter
• Configuration: 4-bit, single element
• Count direction: Up
• Reset type: Asynchronous
• Timing mode: Synchronous
• Trigger mechanism: Positive edge

Electrical Compatibility:

• Supply voltage range must accommodate the application circuit
• Count rate (maximum frequency) must meet or exceed system requirements
• Operating temperature range must cover the deployment environment

Physical Compatibility:

• Package type: 16-SSOP surface mount
• Package dimensions: 0.209" width, 5.30mm width
• Mounting configuration: Surface mount

Regulatory & Compliance:

• RoHS3 compliance status
• Moisture sensitivity level (MSL)

The SN74LV161ADBR from Texas Instruments qualifies as a substitute based on matching functional architecture, identical package specification, and compatible regulatory certifications, despite differences in maximum count rate and supply voltage range.

Parameter Comparison

Engineering Selection Recommendations

The SN74LV161ADBR is an active product from Texas Instruments and serves as a functional substitute for the obsolete 74LVC161DB,112. Both components maintain ROHS3 compliance and MSL Level 1 rating, ensuring equivalent environmental and regulatory standing.

Selection between these parts depends on application-specific constraints:

Use 74LVC161DB,112 (if available): Applications requiring the extended supply voltage range of 1.2 V to 3.6 V or the maximum count rate of 150 MHz, provided inventory is accessible.

Use SN74LV161ADBR: Applications operating within the 2 V to 5.5 V supply range and 95 MHz count rate specification. This part offers active product status and established supply chain availability. The operating temperature range of -40°C to 85°C is suitable for standard industrial and commercial environments.

Pin-to-pin compatibility and identical 16-SSOP package dimensions ensure direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LV161ADBR directly replace the 74LVC161DB,112 in existing designs?

A: Yes, for applications where the system clock frequency does not exceed 95 MHz and the supply voltage operates within 2 V to 5.5 V. The 16-SSOP package dimensions are identical, enabling direct PCB substitution without layout changes.

Q: What is the primary difference between these two parts?

A: The 74LVC161DB,112 supports a lower minimum supply voltage (1.2 V) and higher maximum count rate (150 MHz), while the SN74LV161ADBR operates at higher minimum voltage (2 V) with a lower maximum count rate (95 MHz). Both maintain identical functional architecture and package specifications.

Q: Are there supply voltage compatibility concerns?

A: If your application requires operation below 2 V, the SN74LV161ADBR is not suitable. Verify your circuit's supply voltage range against the substitute part's 2 V to 5.5 V specification before selection.

Q: Does the operating temperature range difference affect substitution?

A: The 74LVC161DB,112 supports -40°C to 125°C, while the SN74LV161ADBR supports -40°C to 85°C. For applications requiring operation above 85°C, the substitute part is not appropriate.

Q: Are both parts RoHS compliant?

A: Yes, both the 74LVC161DB,112 and SN74LV161ADBR are ROHS3 compliant with MSL Level 1 rating, meeting equivalent environmental standards.

Q: What packaging format is the SN74LV161ADBR supplied in?

A: The SN74LV161ADBR is supplied in Tape & Reel (TR) format, standard for surface mount production quantities. Verify packaging requirements for your procurement process.