74F161APC Binary Counter Equivalent & Substitute Parts

Part Overview

The 74F161APC is a 4-bit binary counter IC manufactured by onsemi, designed for synchronous counting applications with positive edge triggering. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement continuity. The 74F161 series provides reliable counting functionality in legacy and maintenance applications where component replacement is required.

Substiute Parts

74F161APC

onsemiIn Stock: 131874F161APC Datasheet

Current PartRFQ

SN74F161AN

Texas InstrumentsIn Stock: 2152SN74F161AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F161APC is determined by strict equivalence across the following critical parameters:

• Logic Function: Binary counter with identical 4-bit configuration
• Electrical Characteristics: Synchronous timing with positive edge triggering, asynchronous reset capability
• Supply Voltage: 4.5 V to 5.5 V operating range
• Package Compatibility: 16-DIP through-hole form factor with 0.300" (7.62mm) pitch
• Pin Configuration: Identical pinout as base product number 74F161

The SN74F161AN from Texas Instruments meets all substitution criteria within these parameters. Differences in count rate specifications (120 MHz vs. 100 MHz) and product status do not affect functional compatibility for standard counting applications within the specified operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The SN74F161AN is a direct functional equivalent for the 74F161APC. Selection between these parts should be based on the following factors:

Product Status: The SN74F161AN maintains active product status with ongoing manufacturer support, whereas the 74F161APC is obsolete. For new designs or long-term procurement requirements, the SN74F161AN is the preferred selection.

Compliance and Certifications: The SN74F161AN carries RoHS3 compliance certification, providing environmental regulatory alignment for applications subject to restriction of hazardous substances. Both parts maintain REACH Unaffected status and EAR99 export classification.

Availability: The SN74F161AN demonstrates higher current inventory levels (2100 pcs) compared to the 74F161APC (1230 pcs), supporting supply chain continuity.

Performance Margin: The count rate specification of 100 MHz for the SN74F161AN remains adequate for standard synchronous counting applications within the 0°C to 70°C operating temperature range and 4.5 V to 5.5 V supply voltage specification.

Frequently Asked Questions (FAQ)

Q: Can the SN74F161AN directly replace the 74F161APC in existing designs?

A: Yes. Both parts share identical pinout, package configuration (16-DIP), and functional specifications for binary counting operations. Direct socket substitution is supported without circuit modification.

Q: What is the significance of the count rate difference (120 MHz vs. 100 MHz)?

A: The count rate specification defines the maximum frequency at which the counter can reliably operate. The SN74F161AN's 100 MHz specification remains suitable for applications operating within standard TTL logic frequency ranges. Applications requiring operation above 100 MHz should verify timing requirements against actual circuit conditions.

Q: Are there packaging differences between these parts?

A: Both parts use identical 16-DIP through-hole packaging with 0.300" (7.62mm) pitch. The SN74F161AN is supplied in tube packaging, while the 74F161APC packaging format is not specified. This does not affect functional compatibility or board-level integration.

Q: What compliance advantages does the SN74F161AN offer?

A: The SN74F161AN carries RoHS3 compliance certification, meeting environmental standards for restricted hazardous substances. Both parts maintain REACH Unaffected status, indicating no substances of very high concern are present in the formulation.

Q: Is the SN74F161AN suitable for new product designs?

A: Yes. The active product status of the SN74F161AN, combined with RoHS3 compliance and established manufacturer support, makes it the appropriate selection for new designs requiring 4-bit binary counter functionality in the 74F logic family.