74F193SC Binary Counter IC Equivalent & Substitute Parts

Part Overview

The 74F193SC is a 4-bit binary counter IC manufactured by onsemi, designed for up/down counting applications with positive edge triggering. This component operates at a maximum count rate of 125 MHz and is housed in a 16-SOIC surface mount package. The part is classified as obsolete, making identification of functionally equivalent substitutes essential for ongoing system support and component procurement.

Substiute Parts

74F193SC

onsemiIn Stock: 140774F193SC Datasheet

Current PartRFQ

SN74LS193D

onsemiIn Stock: 16628SN74LS193D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F193SC is determined by the following critical parameters:

• Logic Function: Binary counter with 4-bit capacity, up/down counting capability, and asynchronous reset
• Trigger Mechanism: Positive edge triggering
• Package Compatibility: 16-SOIC surface mount package with identical physical dimensions
• Electrical Interface: Supply voltage range and operating temperature range
• Pin Configuration: Identical pinout required for direct replacement

The SN74LS193D meets these core functional and physical requirements, enabling direct substitution in applications where the lower count rate specification is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS193D serves as a direct functional substitute for the 74F193SC in applications where the maximum count rate requirement does not exceed 32 MHz. Both components share identical logic functionality, package form factor, and operating temperature range. The primary trade-off is the reduced maximum count rate of the 74LS variant (32 MHz versus 125 MHz).

Both parts are classified as obsolete. The SN74LS193D maintains higher inventory availability (16,552 units in stock versus 1,319 units for the 74F193SC), which may influence procurement decisions for long-term system support.

The 74F193SC operates across a broader supply voltage range (4.5 V ~ 5.5 V) compared to the SN74LS193D (4.75 V ~ 5.25 V). Applications requiring operation at the lower voltage boundary (below 4.75 V) must retain the 74F193SC.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS193D directly replace the 74F193SC in existing designs?

A: Direct replacement is possible if the application's maximum count rate requirement does not exceed 32 MHz. The identical 16-SOIC package and pinout enable physical and electrical compatibility. Verify that your circuit does not depend on the 125 MHz count rate specification of the original part.

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

A: The 74F193SC operates at a maximum count rate of 125 MHz, while the SN74LS193D is rated for 32 MHz. Both are 4-bit binary counters with up/down counting, asynchronous reset, and positive edge triggering. The 74F193SC also supports a wider supply voltage range (4.5 V ~ 5.5 V versus 4.75 V ~ 5.25 V).

Q: Are there any compliance or certification differences?

A: Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The SN74LS193D is RoHS non-compliant. Both parts have MSL rating of 1 (Unlimited) or equivalent moisture sensitivity classification.

Q: Which part should I select for new designs?

A: Selection depends on your application's count rate requirement. If 32 MHz is sufficient, the SN74LS193D offers higher inventory availability. If your circuit requires operation at 125 MHz or at supply voltages below 4.75 V, the 74F193SC is necessary.

Q: Are both parts still in production?

A: Both the 74F193SC and SN74LS193D are classified as obsolete. Component selection should prioritize availability and long-term supply chain considerations.