SNJ54LS193J Equivalent & Substitute Parts

Part Overview

The SNJ54LS193J is a synchronous 4-bit binary up/down counter manufactured by Texas Instruments. This logic IC operates as a positive edge-triggered counter with asynchronous reset capability, designed for applications requiring bidirectional counting functionality. The device is currently in active product status with 1678 units available in inventory.

Finding equivalent and substitute parts becomes necessary when the SNJ54LS193J reaches end-of-life, when supply constraints occur, or when design requirements necessitate alternative packaging or operating temperature ranges. The substitute identified maintains functional equivalence while offering different operational specifications and compliance certifications.

Substiute Parts

SNJ54LS193J

Texas InstrumentsIn Stock: 1776SNJ54LS193J Datasheet

Current PartRFQ

SN74LS193N

onsemiIn Stock: 6160SN74LS193N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN74LS193N qualifies as a functional substitute for the SNJ54LS193J based on the following critical parameters:

• Logic Type: Binary Counter (identical)
• Direction: Up, Down (identical)
• Number of Bits per Element: 4 (identical)
• Reset Type: Asynchronous (identical)
• Timing: Synchronous (identical)
• Count Rate: 32 MHz (identical)
• Trigger Type: Positive Edge (identical)
• Mounting Type: Through Hole (identical)
• Package Family: 16-pin DIP (compatible mechanical footprint)

The substitution is valid from a functional and electrical standpoint. Differences exist in supply voltage range, operating temperature range, product status, and compliance certifications, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The SNJ54LS193J is the preferred choice for applications requiring active product status, extended operating temperature range (-55°C to 125°C), and RoHS3 compliance. This device is suitable for military, aerospace, and industrial applications demanding stringent environmental specifications.

The SN74LS193N serves as a functional alternative when the SNJ54LS193J becomes unavailable. However, selection of this substitute requires acceptance of the following trade-offs:

• Product status is obsolete, indicating no further manufacturing or support from onsemi
• Operating temperature range is restricted to 0°C to 70°C, limiting use in extended temperature applications
• Supply voltage tolerance is narrower (4.75 V to 5.25 V versus 4.5 V to 5.5 V)
• RoHS non-compliance may conflict with regulatory or procurement requirements in certain markets

The mechanical compatibility between 16-CDIP and 16-DIP packages allows direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS193N replace the SNJ54LS193J in all applications?

A: Functional replacement is possible for applications operating within 0°C to 70°C and 4.75 V to 5.25 V. Applications requiring extended temperature operation (-55°C to 125°C) or RoHS3 compliance cannot use this substitute.

Q: What is the difference between 16-CDIP and 16-DIP packaging?

A: Both packages are 16-pin through-hole devices with 0.300" (7.62mm) row spacing and identical pin configurations. CDIP denotes ceramic dual in-line package, while DIP denotes plastic dual in-line package. The electrical and mechanical compatibility allows direct substitution on printed circuit boards.

Q: Why is the SN74LS193N listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and no longer provides technical support or warranty coverage. Existing inventory may be available from distributors, but long-term availability cannot be guaranteed.

Q: Are there differences in electrical performance between these parts?

A: Both devices share identical logic type, count rate (32 MHz), trigger type, and bit configuration. The primary differences are supply voltage tolerance and operating temperature range, which do not affect core counter functionality within their respective operating windows.

Q: Should I consider the SNJ54LS193J for new designs?

A: Yes. The active product status, extended temperature range, and RoHS3 compliance make the SNJ54LS193J the appropriate choice for new designs. The SN74LS193N should be considered only when the SNJ54LS193J is unavailable and application constraints permit its narrower specifications.