SN74HC193AN Equivalent & Substitute Parts

Part Overview

The SN74HC193AN is a 4-bit binary counter IC manufactured by Texas Instruments, designed for synchronous counting operations with both up and down counting capability. This device features positive edge triggering, asynchronous reset functionality, and operates across a wide supply voltage range of 2V to 6V. The SN74HC193AN is classified as an obsolete product, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. The part is packaged in a 16-DIP through-hole configuration and maintains ROHS3 compliance.

Substiute Parts

SN74HC193AN

Texas InstrumentsIn Stock: 1025SN74HC193AN Datasheet

Current PartRFQ

SN74HC193PWR

Texas InstrumentsIn Stock: 5465SN74HC193PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC193AN is determined by functional equivalence across the following critical parameters:

Functional Parameters (Must Match):

• Logic Type: Binary Counter
• Number of Bits per Element: 4 Bit
• Direction: Up, Down capability
• Reset Type: Asynchronous
• Timing: Synchronous
• Trigger Type: Positive Edge
• Voltage - Supply Range: 2V ~ 6V
• Operating Temperature Range: -40°C ~ 85°C

Allowed Variations:

• Mounting Type (Through Hole to Surface Mount)
• Package / Case format (16-DIP to 16-TSSOP)
• Count Rate (performance specification)
• Product Status (Obsolete to Active)
• Packaging format (Bulk to Tape & Reel)

The SN74HC193PWR qualifies as a direct functional substitute based on identical logic specifications and electrical parameters, with the primary difference being package format and mounting technology.

Parameter Comparison

Engineering Selection Recommendations

SN74HC193PWR Selection Criteria:

The SN74HC193PWR is the manufacturer-recommended substitute for the obsolete SN74HC193AN. Selection of this alternative is justified on the following engineering grounds:

Functional Equivalence: All critical logic parameters are identical, ensuring pin-level functional compatibility for counter operation, including up/down counting direction, asynchronous reset, synchronous timing, and positive edge triggering.

Electrical Compatibility: Supply voltage range (2V ~ 6V) and operating temperature range (-40°C ~ 85°C) are identical, permitting direct substitution in existing circuit designs without modification to power supply or thermal management specifications.

Compliance Status: Both devices maintain ROHS3 compliance, satisfying regulatory requirements for new product designs and manufacturing operations.

Product Status Advantage: The SN74HC193PWR holds Active product status with established supply chain availability (5400 Pcs in stock), whereas the SN74HC193AN is classified as Obsolete, making the PWR variant the appropriate choice for ongoing production and new designs.

Package Consideration: Substitution requires PCB redesign to accommodate the transition from 16-DIP through-hole to 16-TSSOP surface-mount packaging. This change is a design-level decision, not a functional limitation.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC193PWR directly replace the SN74HC193AN without circuit modification?

A: The SN74HC193PWR provides functional equivalence for all logic operations. However, PCB layout modification is required due to package format change from 16-DIP (through-hole) to 16-TSSOP (surface-mount). Pin functionality and electrical characteristics remain identical.

Q: What is the significance of the different count rates (60 MHz vs. 24 MHz)?

A: The count rate specification reflects the maximum frequency at which the counter can operate. The SN74HC193AN specifies 60 MHz, while the SN74HC193PWR specifies 24 MHz. For applications operating below 24 MHz, this difference is not functionally limiting. Applications requiring operation above 24 MHz must evaluate timing requirements against the PWR variant's specification.

Q: Why is the SN74HC193AN classified as Obsolete?

A: Obsolete classification indicates that Texas Instruments has discontinued active production and support for this part number. The SN74HC193PWR represents the current active product offering with equivalent functionality, ensuring long-term supply chain availability and manufacturing support.

Q: Are there any electrical parameter differences between these parts?

A: No. Supply voltage range (2V ~ 6V), operating temperature range (-40°C ~ 85°C), logic type, bit width, counting direction, reset type, timing mode, and trigger type are identical across both part numbers. The primary differences are packaging format and product lifecycle status.

Q: What packaging format should be selected for new designs?

A: The SN74HC193PWR in 16-TSSOP surface-mount packaging is the recommended selection for new designs. This format aligns with current manufacturing standards, provides superior availability, and maintains active product status with manufacturer support.

Q: Is the Tape & Reel packaging format compatible with automated assembly?

A: Yes. The Tape & Reel (TR) packaging format of the SN74HC193PWR is standard for automated surface-mount assembly processes. This format is compatible with pick-and-place equipment and standard manufacturing workflows.