CD74HC193M Equivalent & Substitute Parts

Part Overview

The CD74HC193M is a 4-bit binary up/down counter logic integrated circuit manufactured by Texas Instruments in 16-SOIC surface mount packaging. This component functions as a synchronous counter with asynchronous reset capability, supporting both ascending and descending count operations. The part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and production continuity. Substitute parts must maintain functional equivalence across electrical specifications, package form factor, and operational characteristics to ensure direct replacement capability.

Substiute Parts

CD74HC193M

Texas InstrumentsIn Stock: 1833CD74HC193M Datasheet

Current PartRFQ

CD74HC193M96

Harris CorporationIn Stock: 3420CD74HC193M96 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 eligibility for the CD74HC193M is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Logic Type: Binary Counter
• Bit Configuration: 4 Bit per Element
• Directional Capability: Up/Down counting
• Reset Architecture: Asynchronous
• Timing Mode: Synchronous
• Trigger Mechanism: Positive Edge
• Voltage Supply Range: 2 V ~ 6 V (minimum overlap required)
• Package Form Factor: 16-SOIC surface mount
• Base Product Number: 74HC193 series

All identified substitute parts conform to these core parameters, enabling functional equivalence in circuit applications. Variations in count rate, operating temperature range, and compliance certifications do not preclude substitution but are documented for design consideration.

Parameter Comparison

Engineering Selection Recommendations

74HC193D,653 (NXP USA Inc.) is the primary recommended substitute for the CD74HC193M. This part maintains active product status, ensuring long-term availability and supply chain continuity. The component demonstrates ROHS3 compliance alignment with the original part and operates within the identical voltage supply range of 2 V ~ 6 V. The operating temperature range of -40°C ~ 125°C encompasses the majority of industrial and commercial applications, with the upper temperature limit matching the original specification. The enhanced count rate of 49 MHz provides performance headroom relative to the original 29 MHz specification.

74HC193D,652 (Nexperia USA Inc.) serves as a secondary substitute option. This part is ROHS3 compliant and functionally equivalent across all core parameters. The obsolete product status and narrower operating temperature range (-40°C ~ 125°C versus -55°C ~ 125°C) may present considerations for extended temperature applications.

CD74HC193M96 (Harris Corporation) is functionally equivalent but carries non-compliant RoHS status and obsolete product classification, limiting suitability for new designs subject to environmental compliance requirements.

All three substitute parts share identical package geometry (16-SOIC), voltage specifications, and counter functionality, enabling direct circuit board replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC193M be directly replaced with 74HC193D,653?

A: Yes. The 74HC193D,653 maintains functional equivalence across all core electrical parameters: 4-bit binary counter, up/down direction, asynchronous reset, synchronous timing, positive edge trigger, and 2 V ~ 6 V supply voltage. The 16-SOIC package geometry is identical, permitting direct board-level substitution without design modification.

Q: What is the significance of the count rate difference between the main part (29 MHz) and substitute parts (49 MHz)?

A: The higher count rate of substitute parts 74HC193D,652 and 74HC193D,653 represents enhanced performance capability. Applications designed for 29 MHz operation function correctly with 49 MHz components, as the higher specification provides operational margin. No circuit redesign is required.

Q: Does the operating temperature range difference affect substitution suitability?

A: The CD74HC193M operates from -55°C ~ 125°C, while 74HC193D,652 and 74HC193D,653 operate from -40°C ~ 125°C. For applications requiring operation below -40°C, the original temperature range is necessary. For standard industrial and commercial temperature ranges, the substitute parts are suitable.

Q: Why is 74HC193D,653 recommended over CD74HC193M96?

A: The 74HC193D,653 maintains active product status, ensuring ongoing availability and supply chain support. Additionally, 74HC193D,653 is ROHS3 compliant, meeting environmental regulatory requirements for new designs and manufacturing. CD74HC193M96 carries obsolete status and non-compliant RoHS classification.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts utilize 16-SOIC (0.154", 3.90mm Width) surface mount packaging, identical to the CD74HC193M. No PCB layout or assembly process modification is required for substitution.

Q: What compliance certifications should be verified for regulatory requirements?

A: The CD74HC193M and 74HC193D,652 are ROHS3 compliant. The 74HC193D,653 compliance status is not specified in available documentation. CD74HC193M96 is non-compliant with RoHS requirements. Design specifications requiring RoHS compliance should specify 74HC193D,652 or verify 74HC193D,653 compliance status with the manufacturer.

Q: Can substitute parts be used interchangeably in existing production?

A: Yes, provided that product status and compliance requirements are satisfied. The 74HC193D,653 is recommended for new production due to active status and compliance alignment. Existing inventory of CD74HC193M may continue in production until depletion, with transition to 74HC193D,653 for long-term supply continuity.