SN74HC193D Binary Counter 4-Bit Logic IC Equivalent & Substitute Parts

Part Overview

The SN74HC193D is a 4-bit binary counter logic IC manufactured by Texas Instruments in 16-SOIC surface mount packaging. This component functions as a synchronous up/down counter with asynchronous reset capability, designed for digital counting and sequencing applications. The SN74HC193D carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identification of equivalent substitute parts to ensure design continuity and procurement availability for new production runs and field replacements.

Substiute Parts

SN74HC193D

Texas InstrumentsIn Stock: 2110SN74HC193D Datasheet

Current PartRFQ

SN74HC193DR

Texas InstrumentsIn Stock: 3981SN74HC193DR Datasheet

MFR RecommendedRFQ

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 of the SN74HC193D is determined by strict equivalence across the following critical parameters:

Core Functional Parameters:

• Logic Type: Binary Counter (4-bit)
• Direction: Up/Down counting capability
• Reset: Asynchronous reset function
• Timing: Synchronous operation
• Trigger Type: Positive edge triggered
• Number of Elements: 1
• Number of Bits per Element: 4

Electrical Parameters:

• Voltage Supply Range: 2 V ~ 6 V (all substitutes maintain this range)
• Trigger Type: Positive Edge (consistent across all variants)

Physical Parameters:

• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute parts maintain functional and electrical equivalence within the 74HC193 base product family. Variations in count rate (24 MHz vs. 49 MHz) and maximum operating temperature (-40°C ~ 85°C vs. -40°C ~ 125°C) represent performance enhancements rather than functional incompatibilities, as higher specifications are backward compatible with designs specified for lower values.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74HC193DR (Texas Instruments)

The SN74HC193DR is the recommended substitute for the SN74HC193D. Both components are manufactured by Texas Instruments and maintain identical electrical and functional specifications. The SN74HC193DR carries Active product status, ensuring long-term availability and supply chain stability. The primary distinction is packaging format: SN74HC193DR is supplied in Tape & Reel (TR) configuration, suitable for automated assembly processes, whereas the original SN74HC193D is supplied in Tube packaging. This substitution requires no design modifications and is electrically and mechanically equivalent.

Secondary Substitutes: 74HC193D,653 (NXP) and 74HC193D,652 (Nexperia)

The 74HC193D,653 manufactured by NXP USA Inc. is functionally equivalent with Active product status. This part features enhanced specifications: 49 MHz count rate (versus 24 MHz) and extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C). These performance enhancements are backward compatible with designs specified for the original SN74HC193D. The 74HC193D,653 is supplied in Bulk packaging.

The 74HC193D,652 manufactured by Nexperia USA Inc. provides identical functional equivalence with matching enhanced specifications (49 MHz count rate, -40°C ~ 125°C operating range). However, this part carries Obsolete product status, indicating discontinued production. While currently available in inventory, long-term procurement cannot be assured.

Compliance and Certification:

All identified substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) ratings, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC193DR directly replace the SN74HC193D in existing designs?

A: Yes. The SN74HC193DR is electrically and functionally identical to the SN74HC193D. Both components share identical pin configurations, electrical specifications, and functional behavior. The only difference is packaging format (Tape & Reel versus Tube). No circuit modifications are required.

Q: What is the difference between the Texas Instruments SN74HC193D and the NXP 74HC193D,653?

A: Both parts are functionally equivalent 4-bit binary counters with identical pin configurations and core logic operation. The NXP 74HC193D,653 offers enhanced specifications: maximum count rate of 49 MHz (compared to 24 MHz for the TI version) and extended operating temperature range to 125°C (compared to 85°C). These enhancements are backward compatible; designs specified for the TI version will operate correctly with the NXP part.

Q: Is the 74HC193D,652 (Nexperia) a viable long-term substitute?

A: The 74HC193D,652 is functionally equivalent and currently available in inventory. However, this part carries Obsolete product status, indicating that Nexperia has discontinued production. While substitution is technically valid, long-term procurement availability cannot be assured. The NXP 74HC193D,653 or Texas Instruments SN74HC193DR are preferred for new designs requiring sustained supply.

Q: What packaging formats are available for 74HC193 binary counters?

A: The identified substitutes are available in three packaging formats: Tube (SN74HC193D), Tape & Reel (SN74HC193DR), and Bulk (74HC193D,653 and 74HC193D,652). Tape & Reel packaging is standard for high-volume automated assembly. Tube packaging is suitable for lower-volume manual assembly. Bulk packaging is used for component distribution and inventory management.

Q: Are all 74HC193 variants ROHS3 compliant?

A: Yes. All identified substitutes—SN74HC193D, SN74HC193DR, 74HC193D,652, and 74HC193D,653—are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting current environmental and manufacturing standards.

Q: Can I use a 74HC193 with a 49 MHz count rate in a design specified for 24 MHz?

A: Yes. The 49 MHz count rate represents enhanced performance. A component specified for higher frequency operation is backward compatible with designs requiring lower frequency operation. The 74HC193D,653 and 74HC193D,652 (both 49 MHz variants) can be used in any application designed for the 24 MHz SN74HC193D without modification.