74HCT193N,652 Binary Counter IC - Equivalent & Substitute Parts

Part Overview

The 74HCT193N,652 is a 4-bit binary counter IC manufactured by NXP USA Inc., designed for synchronous up/down counting applications. This part operates at a maximum count rate of 43 MHz with positive edge triggering and is housed in a 16-DIP through-hole package. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

74HCT193N,652

NXP USA Inc.In Stock: 85374HCT193N,652 Datasheet

Current PartRFQ

CD74HCT193E

Harris CorporationIn Stock: 9306CD74HCT193E Datasheet

DirectRFQ

SN74ALS193AN

Texas InstrumentsIn Stock: 3178SN74ALS193AN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HCT193N,652 are qualified based on the following critical parameters that determine functional equivalence:

• Logic Type & Function: Binary counter with 4-bit capacity
• Directional Capability: Up and down counting modes
• Reset Architecture: Asynchronous reset functionality
• Timing Behavior: Synchronous operation with positive edge triggering
• Electrical Interface: 4.5 V to 5.5 V supply voltage compatibility
• Physical Form Factor: 16-DIP through-hole package (0.300", 7.62mm)

The substitute parts listed below maintain these core functional and physical characteristics, enabling direct replacement in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT193E (Harris Corporation): This part maintains identical series classification (74HCT) and all core functional parameters. However, it carries a lower maximum count rate of 22 MHz compared to the original 43 MHz specification and is classified as RoHS non-compliant. Selection of this substitute is appropriate only when count rate reduction is acceptable and RoHS compliance is not a system requirement.

SN74ALS193AN (Texas Instruments): This part is the manufacturer-recommended substitute, offering active product status with ROHS3 compliance. The 74ALS series provides a count rate of 30 MHz, which is lower than the original 43 MHz but higher than the Harris alternative. The operating temperature range is narrower (0°C ~ 70°C versus -40°C ~ 125°C), requiring verification against application thermal requirements. This part is suitable for new designs and ongoing production where compliance certifications and active manufacturer support are required.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT193E directly replace the 74HCT193N,652 in all applications?

A: The CD74HCT193E maintains functional equivalence in logic operation, package form factor, and electrical interface. However, the reduced maximum count rate of 22 MHz versus 43 MHz may impact performance in timing-critical applications. Additionally, RoHS non-compliance may conflict with system-level regulatory requirements.

Q: What is the primary difference between the 74HCT and 74ALS series substitutes?

A: Both series are TTL-compatible binary counters with identical functional architecture. The 74HCT series uses CMOS technology, while the 74ALS series uses advanced low-power Schottky technology. The SN74ALS193AN offers active product status and modern compliance certifications, making it the preferred choice for new designs.

Q: Is the SN74ALS193AN suitable for applications requiring the full -40°C ~ 125°C temperature range?

A: No. The SN74ALS193AN operates within 0°C ~ 70°C, which is narrower than the original specification. Applications requiring extended temperature operation must either use the CD74HCT193E (which supports -55°C ~ 125°C) or identify alternative solutions outside this substitute group.

Q: Are all three parts available in the same 16-DIP through-hole package?

A: Yes. All three parts use the 16-DIP (0.300", 7.62mm) through-hole package, enabling direct physical substitution on existing printed circuit boards without layout modifications.

Q: Which substitute part is recommended for new product designs?

A: The SN74ALS193AN is the manufacturer-recommended substitute, offering active product status, ROHS3 compliance, and ongoing manufacturer support. This part is suitable for new designs where compliance and long-term availability are priorities.