DM74LS164N Equivalent & Substitute Parts

Part Overview

The DM74LS164N is an 8-bit serial-to-parallel shift register manufactured by onsemi, housed in a 14-DIP package. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement. The shift register converts serial input data into parallel output format, making it suitable for data conversion and signal processing applications requiring serial-to-parallel transformation.

Substiute Parts

DM74LS164N

onsemiIn Stock: 3180DM74LS164N Datasheet

Current PartRFQ

SN74LS164N

Texas InstrumentsIn Stock: 15459SN74LS164N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS164N is determined by strict alignment of the following electrical and mechanical parameters:

• Logic Type: Shift Register (8-bit configuration)
• Function: Serial to Parallel conversion
• Voltage Supply Range: 4.75V ~ 5.25V
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 14-DIP (0.300", 7.62mm)
• Base Product Number: 74LS164

The SN74LS164N manufactured by Texas Instruments meets all substitution criteria. Both devices share identical functional specifications, electrical operating ranges, and physical packaging, enabling direct functional replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS164N is the direct functional equivalent for the obsolete DM74LS164N. Selection of the Texas Instruments variant provides the following advantages:

• Active product status ensures continued availability and manufacturing support
• ROHS3 compliance satisfies modern regulatory requirements for electronic components
• Identical electrical specifications and 14-DIP package enable direct pin-for-pin replacement
• Established supply chain availability (15,423 units in stock versus 3,157 for the onsemi variant)

For applications requiring the 74LS164 shift register function, the SN74LS164N is the appropriate selection when the DM74LS164N reaches end-of-life or inventory depletion.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS164N directly replace the DM74LS164N in existing designs?

A: Yes. Both devices share identical pin configurations, electrical operating ranges (4.75V ~ 5.25V supply, 0°C ~ 70°C operating temperature), and 14-DIP package dimensions. No circuit modifications are required for substitution.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The DM74LS164N is classified as obsolete, indicating onsemi has discontinued manufacturing. The SN74LS164N remains in active production by Texas Instruments, ensuring long-term availability and supply chain reliability for new designs and production runs.

Q: Does the RoHS compliance difference affect compatibility?

A: RoHS compliance is a manufacturing and environmental standard, not a functional parameter. The ROHS3-compliant SN74LS164N is functionally equivalent and suitable for applications where RoHS compliance is required. The non-compliant DM74LS164N remains functionally compatible but may not meet regulatory requirements for certain markets or applications.

Q: Are there any output type differences between these devices?

A: The DM74LS164N specifies Standard output type, while the SN74LS164N specifies Push-Pull output type. Both configurations are compatible with standard 74LS logic family circuits and do not prevent direct substitution.

Q: What packaging options are available for the 74LS164 base product?

A: Both the DM74LS164N and SN74LS164N are supplied in 14-DIP (0.300", 7.62mm) through-hole packages. The onsemi variant is supplied in standard tube packaging, while the Texas Instruments variant is supplied in tube packaging as well, ensuring compatibility with standard component handling and insertion equipment.