SN74HC193DT Equivalent & Substitute Parts

Part Overview

The SN74HC193DT is a 4-bit binary counter IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component functions as a synchronous up/down 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 classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SN74HC193DT

Texas InstrumentsIn Stock: 892SN74HC193DT Datasheet

Current PartRFQ

SN74HC191DR

Texas InstrumentsIn Stock: 5129SN74HC191DR Datasheet

MFR RecommendedRFQ

SN74HC193DR

Texas InstrumentsIn Stock: 3981SN74HC193DR Datasheet

Parametric EquivalentRFQ

74HC193D,652

Nexperia USA Inc.In Stock: 76974HC193D,652 Datasheet

MFR RecommendedRFQ

74HC193D,653

NXP USA Inc.In Stock: 984974HC193D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74HC193DT is determined by the following critical parameters: logic type (binary counter), bit width (4-bit), directional capability (up/down), reset configuration (asynchronous), timing mode (synchronous), trigger type (positive edge), supply voltage range (2V–6V), and package type (16-SOIC surface mount).

The substitute parts are grouped into two categories:

Manufacturer Recommended Substitutes (Active Status): Parts that maintain identical electrical and mechanical specifications with current product availability. These include the SN74HC191DR and SN74HC193DR from Texas Instruments, both in Tape & Reel packaging with active product status.

Parametric Equivalents (Alternative Manufacturers): Parts from alternative manufacturers (Nexperia/NXP) that meet the same functional and electrical requirements. The 74HC193D,652 and 74HC193D,653 variants provide equivalent counter functionality with enhanced operating temperature ranges and higher count rates, though some variants are obsolete.

Parameter Comparison

Engineering Selection Recommendations

For new designs and ongoing procurement, the SN74HC191DR and SN74HC193DR from Texas Instruments are the primary recommended substitutes. Both parts maintain active product status, ensuring long-term availability and supply chain stability. These parts are functionally identical to the SN74HC193DT across all critical electrical parameters and are supplied in Tape & Reel packaging suitable for automated assembly.

The 74HC193D,653 from NXP USA Inc. provides an alternative from a qualified manufacturer with active product status. This part offers enhanced operating temperature range (-40°C to 125°C) and higher count rate capability (49 MHz), making it suitable for applications requiring extended thermal performance. The 74HC193D,652 variant from Nexperia USA Inc. is obsolete and should not be selected for new designs.

All substitute parts maintain ROHS3 compliance and identical supply voltage specifications, ensuring direct functional replacement in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC191DR be used as a direct replacement for the SN74HC193DT?

A: Yes. The SN74HC191DR is electrically and mechanically equivalent to the SN74HC193DT. Both are 4-bit binary counters with identical logic type, bit width, directional capability, reset configuration, timing mode, trigger type, supply voltage range, and 16-SOIC package. The primary difference is packaging format (Tape & Reel versus bulk) and active product status.

Q: What is the difference between the SN74HC191DR and SN74HC193DR?

A: Both parts are functionally equivalent 4-bit binary counters from Texas Instruments with identical electrical specifications. The primary distinction is the base product number designation (74HC191 versus 74HC193), though both maintain the same counter functionality, pin configuration, and performance characteristics. Selection between these parts should be based on availability and supply chain requirements.

Q: Are the Nexperia/NXP variants (74HC193D,652 and 74HC193D,653) compatible with the SN74HC193DT?

A: Yes, both Nexperia/NXP variants are functionally compatible. They maintain identical logic type, bit width, directional capability, reset configuration, timing mode, trigger type, and supply voltage specifications. The 74HC193D,653 is recommended for new designs due to active product status. Both variants offer enhanced operating temperature range (-40°C to 125°C) and higher count rate (49 MHz) compared to the original part.

Q: Does package format affect substitution compatibility?

A: Package format does not affect electrical compatibility. The SN74HC193DT, SN74HC191DR, and SN74HC193DR all use the 16-SOIC surface mount package. Packaging differences (Tape & Reel versus bulk) relate to supply and handling methods, not functional performance. Verify packaging requirements with your procurement process before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (SN74HC191DR, SN74HC193DR, 74HC193D,652, and 74HC193D,653) are ROHS3 compliant, matching the compliance status of the original SN74HC193DT.

Q: Which substitute should be selected for new designs?

A: For new designs, select either the SN74HC191DR or SN74HC193DR from Texas Instruments, both with active product status. If extended operating temperature range (-40°C to 125°C) or higher count rate (49 MHz) is required, the 74HC193D,653 from NXP USA Inc. is an alternative with active status. Avoid obsolete variants (SN74HC193DT and 74HC193D,652) for new designs.