SN74HCS259DR Equivalent & Substitute Parts

Part Overview

The SN74HCS259DR is an 8-bit addressable latch integrated circuit manufactured by Texas Instruments. This D-type, addressable logic device features a 1:8 multiplexing circuit with CMOS output technology, housed in a 16-SOIC surface mount package. The device is classified as Active product status and is suitable for applications requiring addressable latch functionality across industrial and commercial temperature ranges. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and functional characteristics align with the original specification, enabling component interchangeability in system designs.

Substiute Parts

SN74HCS259DR

Texas InstrumentsIn Stock: 3535SN74HCS259DR Datasheet

Current PartRFQ

SN74HCS259QDRQ1

Texas InstrumentsIn Stock: 3346SN74HCS259QDRQ1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HCS259DR is determined by strict alignment of the following critical parameters:

Electrical Compatibility Parameters:

• Logic type classification (D-Type, Addressable)
• Circuit configuration (1:8 multiplexing)
• Output technology (CMOS)
• Supply voltage range (2V ~ 6V)
• Propagation delay time (6ns)
• Output current specifications (7.8mA high and low)
• Operating temperature range (-40°C ~ 125°C)

Mechanical Compatibility Parameters:

• Package designation (16-SOIC)
• Physical dimensions (0.154", 3.90mm width)
• Mounting technology (Surface Mount)
• Supplier device package classification (16-SOIC)

Functional Parameters:

• Independent circuits count (1)
• Series designation (74HCS)
• Base product number (74HCS259)

The SN74HCS259QDRQ1 qualifies as a parametric equivalent substitute because all electrical and mechanical parameters match the SN74HCS259DR specification exactly. The primary distinction is the addition of automotive-grade qualification (AEC-Q100) and automotive product designation, which represents an enhancement rather than a deviation from the base specification.

Parameter Comparison

Engineering Selection Recommendations

SN74HCS259DR Selection Criteria: The SN74HCS259DR is appropriate for standard industrial and commercial applications where automotive qualification is not required. This part maintains Active product status and is available in high inventory quantities (3427 pcs), supporting immediate procurement for non-automotive system designs.

SN74HCS259QDRQ1 Selection Criteria: The SN74HCS259QDRQ1 is the automotive-qualified variant of the SN74HCS259DR, carrying AEC-Q100 certification. This part is suitable for automotive applications, including engine control modules, body electronics, and other automotive systems requiring qualified components. The SN74HCS259QDRQ1 maintains identical electrical and mechanical specifications to the standard variant while meeting automotive industry qualification standards. This part also maintains Active product status with substantial inventory availability (3333 pcs).

Interchangeability: Both parts are electrically and mechanically interchangeable within their respective application domains. Selection between the two variants depends solely on whether automotive qualification is a system requirement. No design modifications, PCB layout changes, or firmware adjustments are necessary when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCS259QDRQ1 be used as a direct replacement for the SN74HCS259DR in non-automotive applications?

A: Yes. The SN74HCS259QDRQ1 is electrically and mechanically identical to the SN74HCS259DR. The automotive qualification and AEC-Q100 certification represent additional compliance attributes that do not restrict use in standard industrial or commercial applications. The part will function identically in non-automotive designs.

Q: Can the SN74HCS259DR be used in automotive applications?

A: The SN74HCS259DR lacks automotive qualification and AEC-Q100 certification. Automotive system designs requiring qualified components must use the SN74HCS259QDRQ1 variant to meet automotive industry standards and compliance requirements.

Q: Are there any package or pinout differences between these parts?

A: No. Both the SN74HCS259DR and SN74HCS259QDRQ1 use the identical 16-SOIC package with 0.154" width (3.90mm). Pinout, pad layout, and mechanical dimensions are identical. No PCB modifications are required when substituting between these parts.

Q: What is the significance of the "Q" designation in the SN74HCS259QDRQ1 part number?

A: The "Q" designation indicates automotive qualification. The SN74HCS259QDRQ1 meets AEC-Q100 standards for automotive applications. The standard SN74HCS259DR does not carry this qualification.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. Both parts share identical specifications for logic type, circuit configuration, output type, supply voltage range, propagation delay time, output current, and operating temperature range. Electrical performance is equivalent across all provided parameters.

Q: What is the moisture sensitivity level for these parts?

A: Both the SN74HCS259DR and SN74HCS259QDRQ1 have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

Q: Are both parts available in Tape & Reel packaging?

A: Yes. Both the SN74HCS259DR and SN74HCS259QDRQ1 are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.