SN74HCS174DR Equivalent & Substitute Parts

Part Overview

The SN74HCS174DR is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments. This device functions as a single element, 6-bit positive edge-triggered flip-flop with complementary outputs and integrated set/preset and reset functionality. The part is classified as an active product and is supplied in a 16-SOIC surface mount package.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and functional characteristics align with the original specification. The primary substitute for the SN74HCS174DR is the SN74HCS174QDRQ1, which maintains identical electrical parameters while adding automotive-grade qualification and AEC-Q100 compliance.

Substiute Parts

SN74HCS174DR

Texas InstrumentsIn Stock: 3007SN74HCS174DR Datasheet

Current PartRFQ

SN74HCS174QDRQ1

Texas InstrumentsIn Stock: 3355SN74HCS174QDRQ1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HCS174DR is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Clock frequency: 200 MHz
• Maximum propagation delay: 11 ns @ 6V, 50pF
• Supply voltage range: 2V ~ 6V
• Output current capability: 7.8 mA (high and low)
• Quiescent current: 2 µA
• Input capacitance: 5 pF
• Operating temperature range: -40°C ~ 125°C

Functional Equivalence Requirements:

• Type: D-Type flip-flop
• Number of elements: 1
• Number of bits per element: 6
• Output type: Complementary
• Trigger type: Positive edge
• Function: Set(Preset) and Reset

Mechanical Equivalence Requirements:

• Package: 16-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface mount
• Moisture sensitivity level: 1 (Unlimited)

The SN74HCS174QDRQ1 meets all electrical, functional, and mechanical equivalence criteria and is therefore a direct parametric substitute for the SN74HCS174DR.

Parameter Comparison

Engineering Selection Recommendations

SN74HCS174DR is suitable for general-purpose logic applications requiring a 6-bit D-Type flip-flop with positive edge triggering. The device maintains active product status and is available in standard commercial grade.

SN74HCS174QDRQ1 is the direct substitute for applications requiring automotive-grade qualification. This variant carries AEC-Q100 certification, which qualifies the device for automotive and high-reliability applications. The SN74HCS174QDRQ1 maintains identical electrical performance and mechanical compatibility while meeting automotive industry standards.

Selection between these two parts depends on application requirements:

• Use SN74HCS174DR for standard commercial applications
• Use SN74HCS174QDRQ1 for automotive applications or systems requiring AEC-Q100 compliance

Both parts are manufactured by Texas Instruments and share the same base product number (74HCS174), ensuring design compatibility and interchangeability within their respective application domains.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCS174QDRQ1 be used as a direct replacement for the SN74HCS174DR?

A: Yes. The SN74HCS174QDRQ1 is a direct parametric substitute. All electrical specifications, functional characteristics, and mechanical dimensions are identical. The primary difference is the addition of automotive-grade qualification and AEC-Q100 certification on the QDRQ1 variant.

Q: What is the difference between the SN74HCS174DR and SN74HCS174QDRQ1?

A: Both parts are functionally and electrically equivalent. The SN74HCS174QDRQ1 includes automotive-grade qualification and AEC-Q100 compliance, making it suitable for automotive and high-reliability applications. The standard SN74HCS174DR is intended for general commercial use.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both the SN74HCS174DR and SN74HCS174QDRQ1 use the 16-SOIC package with dimensions of 0.154" × 3.90mm width. They are mechanically interchangeable on printed circuit boards.

Q: What is the operating temperature range for both parts?

A: Both parts operate across the temperature range of -40°C to 125°C (TA). This range applies to both the standard and automotive-grade variants.

Q: Can I use the SN74HCS174DR in an automotive application?

A: The SN74HCS174DR is not qualified for automotive applications. For automotive applications requiring AEC-Q100 compliance, use the SN74HCS174QDRQ1.

Q: What is the maximum clock frequency for this flip-flop?

A: The maximum clock frequency is 200 MHz for both the SN74HCS174DR and SN74HCS174QDRQ1.

Q: What is the propagation delay specification?

A: The maximum propagation delay is 11 nanoseconds at 6V supply voltage with a 50pF load capacitance for both variants.

Q: Are both parts still in active production?

A: Yes. Both the SN74HCS174DR and SN74HCS174QDRQ1 maintain active product status with Texas Instruments.