SN74HCS164DYYR Equivalent & Substitute Parts

Part Overview

The SN74HCS164DYYR is an 8-bit serial-in/parallel-out shift register manufactured by Texas Instruments, classified as a logic integrated circuit in the 74HCS series. This device converts serial data input into parallel output across 8 bits and operates as a single-element shift register with push-pull output configuration. The part is currently in active production status and is available in surface mount packaging (SOT-23-14 Thin variant).

Substitute parts are identified when equivalent electrical performance, functional capability, and mechanical compatibility are maintained across the same parameter set. Substitution becomes necessary when the primary part number reaches end-of-life status, inventory constraints occur, or application-specific requirements (such as automotive qualification) necessitate alternative sourcing.

Substiute Parts

SN74HCS164DYYR

Texas InstrumentsIn Stock: 4110SN74HCS164DYYR Datasheet

Current PartRFQ

SN74HCS164QDYYRQ1

Texas InstrumentsIn Stock: 2398SN74HCS164QDYYRQ1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HCS164DYYR is determined by strict equivalence across the following parameters:

Functional Parameters (Must Match Exactly):

• Logic type: Shift Register
• Function: Serial to Parallel conversion
• Number of bits per element: 8
• Number of elements: 1
• Output type: Push-Pull

Electrical Parameters (Must Match Exactly):

• Supply voltage range: 2V ~ 6V
• Operating temperature range: -40°C ~ 125°C (TA)

Mechanical Parameters (Must Match Exactly):

• Package type: SOT-23-14 Thin (SOT-23 Variant)
• Mounting type: Surface Mount
• Supplier device package: 14-SOT-23-THIN

Reliability Parameters (Must Match or Exceed):

• Moisture Sensitivity Level: 1 (Unlimited)

The SN74HCS164QDYYRQ1 meets all substitution criteria. This part maintains identical functional, electrical, and mechanical specifications while adding automotive-grade qualification (AEC-Q100) and automotive temperature/reliability certification. The addition of automotive qualification does not restrict use in non-automotive applications and represents a superset of the standard part's capabilities.

Parameter Comparison

Engineering Selection Recommendations

SN74HCS164DYYR (Standard Grade): Use this part number for general-purpose applications where automotive qualification is not required. The part is in active production status with established supply chain availability. This variant is suitable for consumer electronics, industrial control systems, and general logic applications operating within the specified voltage and temperature ranges.

SN74HCS164QDYYRQ1 (Automotive Grade): Use this part number for automotive applications requiring AEC-Q100 qualification or for applications where enhanced reliability documentation and automotive-grade manufacturing processes are mandated. This part maintains full compatibility with the standard grade variant across all functional, electrical, and mechanical parameters. The automotive qualification adds process controls and reliability testing without restricting application scope. This part is also in active production status.

Both parts are suitable for direct substitution based on identical electrical performance, functional capability, and mechanical compatibility. Selection between the two variants depends solely on application requirements and qualification mandates, not on technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCS164QDYYRQ1 be used as a direct replacement for the SN74HCS164DYYR?

A: Yes. The SN74HCS164QDYYRQ1 is a direct substitute. All functional parameters (8-bit serial-to-parallel shift register), electrical parameters (2V–6V supply, -40°C to 125°C operating range), and mechanical parameters (SOT-23-14 Thin package, surface mount) are identical. The automotive-grade qualification of the QDYYRQ1 variant represents an additional capability that does not restrict its use in non-automotive applications.

Q: What is the difference between SN74HCS164DYYR and SN74HCS164QDYYRQ1?

A: The primary difference is qualification level. The SN74HCS164QDYYRQ1 carries AEC-Q100 automotive qualification and is manufactured to automotive-grade standards. Both parts are functionally and electrically identical 8-bit shift registers in the same SOT-23-14 Thin package. The automotive variant includes enhanced reliability documentation and manufacturing process controls.

Q: Are the pin configurations identical between these two parts?

A: Yes. Both parts use the SOT-23-14 Thin package with identical pin assignments. No PCB layout modifications are required when substituting between these part numbers.

Q: Can these parts be used interchangeably in production?

A: Yes, provided that design documentation and bill of materials (BOM) are updated to reflect the selected part number. Both parts meet the same functional and electrical requirements. If automotive qualification is not a design requirement, either part may be selected based on availability and cost considerations.

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

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special moisture control requirements.

Q: Are there any temperature or voltage derating considerations between these parts?

A: No. Both parts operate identically across the full specified range of 2V–6V supply voltage and -40°C to 125°C operating temperature. No derating differences exist between the standard and automotive variants.

Q: What packaging format is available for these parts?

A: Both parts are supplied in Tape & Reel (TR) format for automated assembly. The physical package is SOT-23-14 Thin, a surface mount configuration suitable for high-volume production.