74F163ASCX Binary Counter 4-Bit Logic IC Equivalent & Substitute Parts

Part Overview

The 74F163ASCX is a 4-bit binary counter logic IC manufactured by onsemi, housed in a 16-SOIC surface mount package. This component functions as a synchronous binary counter with positive edge triggering, capable of counting at rates up to 120 MHz. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain functional equivalence while offering improved availability and product status.

Substiute Parts

74F163ASCX

onsemiIn Stock: 154074F163ASCX Datasheet

Current PartRFQ

SN74F163AD

Texas InstrumentsIn Stock: 2141SN74F163AD Datasheet

DirectRFQ

SN74F163ADR

Texas InstrumentsIn Stock: 8780SN74F163ADR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F163ASCX is determined by strict equivalence across the following critical parameters:

• Logic Type: Binary Counter (identical function)
• Number of Elements and Bits: 1 element, 4 bits per element (identical architecture)
• Reset and Timing: Synchronous reset and synchronous timing (identical control behavior)
• Trigger Type: Positive edge triggering (identical clock response)
• Voltage Supply Range: 4.5 V – 5.5 V (identical electrical requirements)
• Operating Temperature: 0°C – 70°C (identical thermal range)
• Package / Case: 16-SOIC surface mount (identical physical footprint and pinout)

The substitute parts SN74F163AD and SN74F163ADR, both manufactured by Texas Instruments, meet all these criteria. Differences in count rate (100 MHz vs. 120 MHz) and product status do not prevent substitution in applications where the lower count rate specification is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The 74F163ASCX is obsolete and no longer in active production. For new designs and production continuity, the SN74F163ADR is the preferred substitute. This part is manufactured by Texas Instruments, carries Active product status, is ROHS3 compliant, and is available in Tape & Reel packaging suitable for automated assembly. The SN74F163ADR maintains full functional equivalence with the original part across all critical parameters.

The SN74F163AD is an alternative substitute available in Tube packaging with Last Time Buy status. This part is also ROHS3 compliant and functionally equivalent but has limited availability horizon.

Both Texas Instruments substitutes operate at 100 MHz count rate, which is lower than the original 74F163ASCX specification of 120 MHz. Applications requiring the full 120 MHz count rate must evaluate whether the 100 MHz specification is acceptable for their specific timing requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74F163ADR directly replace the 74F163ASCX without circuit modifications?

A: Yes. The SN74F163ADR is a direct functional equivalent with identical pinout, package footprint, voltage supply range, operating temperature range, and logic behavior. No circuit modifications are required for pin-compatible substitution.

Q: What is the difference between SN74F163AD and SN74F163ADR?

A: Both parts are functionally identical. The primary difference is packaging format: SN74F163AD is supplied in Tube packaging, while SN74F163ADR is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes. SN74F163ADR also has Active product status, while SN74F163AD is Last Time Buy.

Q: Does the 100 MHz count rate of the Texas Instruments substitutes affect compatibility?

A: The count rate difference (100 MHz vs. 120 MHz) does not affect functional compatibility or pinout. However, applications operating at or near 120 MHz must confirm that 100 MHz operation meets their timing specifications. For most standard logic applications, 100 MHz is sufficient.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both SN74F163AD and SN74F163ADR are ROHS3 compliant. The original 74F163ASCX RoHS status is not specified in the available data.

Q: What is the MSL rating, and does it affect handling?

A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling procedures apply without special moisture control requirements.

Q: Which substitute should be selected for new production?

A: SN74F163ADR is recommended for new production due to its Active product status and Tape & Reel packaging compatibility with automated assembly. SN74F163AD should be reserved for legacy system support or applications where Tube packaging is required.