SNJ54HC148J Priority Encoder - Equivalent & Substitute Parts

Part Overview

The SNJ54HC148J is an 8-line to 3-line priority encoder manufactured by Texas Instruments, designed for logic applications requiring priority encoding functionality. This component features a 1 x 8:3 circuit configuration housed in a 16-CDIP through-hole package. The device is currently in active production status with 1,305 units available in new original inventory.

Priority encoders are essential components in digital systems where multiple input signals must be converted to a binary output representing the highest priority active input. Finding equivalent substitute parts may be necessary due to supply chain considerations, packaging preferences, or specific application requirements while maintaining functional compatibility.

Substiute Parts

SNJ54HC148J

Texas InstrumentsIn Stock: 1383SNJ54HC148J Datasheet

Current PartRFQ

SN74HC148N

Texas InstrumentsIn Stock: 13825SN74HC148N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SNJ54HC148J is determined by the following critical parameters:

Functional Compatibility Requirements:

• Circuit configuration must be 1 x 8:3 (8-line to 3-line priority encoding)
• Type classification must be Priority Encoder
• Output current specifications must match: 5.2mA high and 5.2mA low

Electrical Compatibility Requirements:

• Voltage supply range must encompass or match 2V ~ 6V
• Single supply voltage source configuration

Physical Compatibility Requirements:

• Through-hole mounting type
• 16-pin DIP package family (CDIP or PDIP variants acceptable)
• Pin spacing of 0.300" (7.62mm)

Compliance Requirements:

• ROHS3 compliance maintained
• Active product status

The SN74HC148N substitute part meets all functional and electrical compatibility criteria while offering an alternative series designation and operating temperature range suitable for specific application environments.

Parameter Comparison

Engineering Selection Recommendations

SNJ54HC148J Selection Criteria:

• Applications requiring extended operating temperature range of -55°C to 125°C
• Military or aerospace specifications demanding 54HC series qualification
• Environments with extreme temperature exposure

SN74HC148N Selection Criteria:

• Standard commercial and industrial applications with -40°C to 85°C operating range
• Higher inventory availability (13,752 units in stock versus 1,305 units)
• Applications where 74HC series qualification is acceptable
• Cost-optimized procurement scenarios

Both parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory conformance. The selection between these parts depends on application temperature requirements and series-specific design specifications rather than functional capability differences.

Frequently Asked Questions (FAQ)

Q: Can SN74HC148N directly replace SNJ54HC148J in all applications?

A: Direct replacement is possible for applications operating within the -40°C to 85°C temperature range. Applications requiring the extended -55°C to 125°C range of the SNJ54HC148J require the original part number. Both parts share identical circuit configuration, output current specifications, and voltage supply requirements.

Q: What is the difference between 54HC and 74HC series designations?

A: The 54HC series (SNJ54HC148J) is qualified for extended military and aerospace temperature ranges (-55°C to 125°C), while the 74HC series (SN74HC148N) is rated for standard commercial temperature ranges (-40°C to 85°C). Both series use identical logic families and pin configurations.

Q: Are the package types interchangeable?

A: Both 16-CDIP and 16-DIP packages maintain identical 0.300" (7.62mm) pin spacing and through-hole mounting compatibility. Physical board layout and footprints are interchangeable between these package variants.

Q: What inventory considerations apply to these parts?

A: The SN74HC148N substitute offers significantly higher inventory availability (13,752 units) compared to the SNJ54HC148J (1,305 units), which may influence procurement timelines and lead times for high-volume applications.

Q: Are both parts RoHS compliant?

A: Yes, both SNJ54HC148J and SN74HC148N maintain ROHS3 compliance status, meeting environmental and regulatory requirements for commercial and industrial applications.