DM74ALS14N Equivalent & Substitute Parts

Part Overview

The DM74ALS14N is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-MDIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The DM74ALS14N operates within a 4.5V to 5.5V supply voltage range and is designed for through-hole mounting applications requiring logic inversion with hysteresis characteristics.

Substiute Parts

DM74ALS14N

onsemiIn Stock: 2236DM74ALS14N Datasheet

Current PartRFQ

SN74LS14N

Texas InstrumentsIn Stock: 16169SN74LS14N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN74LS14N qualifies as a functional substitute for the DM74ALS14N based on the following criteria:

Matching Parameters:

• Logic Type: Both are 6-channel inverters with Schmitt trigger inputs
• Number of Circuits: 6 channels in both devices
• Number of Inputs: 1 input per channel in both devices
• Mounting Type: Both use through-hole mounting
• Package / Case: Both use 14-DIP (0.300", 7.62mm) physical form factor
• Operating Temperature Range: Both operate 0°C ~ 70°C
• Output Current Capability: Both provide 400µA high and 8mA low output current

Supply Voltage Compatibility: The DM74ALS14N operates at 4.5V ~ 5.5V, while the SN74LS14N operates at 4.75V ~ 5.25V. The overlap range of 4.75V ~ 5.25V ensures functional compatibility in standard 5V logic applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS14N from Texas Instruments is a suitable substitute for the obsolete DM74ALS14N. The primary advantage of selecting the SN74LS14N is its active product status, ensuring long-term availability and supply chain stability. The SN74LS14N also provides ROHS3 compliance, meeting modern environmental and regulatory requirements.

Both devices share identical logic functionality, pin configuration, and physical package dimensions, enabling direct replacement in through-hole PCB applications. The supply voltage operating ranges overlap sufficiently for standard 5V logic circuits. The SN74LS14N exhibits slightly longer propagation delay (22ns versus 12ns), which is acceptable in most general-purpose logic applications where timing margins are not critical.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS14N directly replace the DM74ALS14N without PCB modifications?

A: Yes. Both devices use identical 14-DIP (0.300", 7.62mm) through-hole packages with matching pin configurations. No PCB layout changes are required for direct substitution.

Q: Are there supply voltage compatibility concerns?

A: The DM74ALS14N operates at 4.5V ~ 5.5V and the SN74LS14N at 4.75V ~ 5.25V. In standard 5V logic applications operating within the 4.75V ~ 5.25V overlap range, both devices function identically. Applications requiring operation below 4.75V or above 5.25V must verify compatibility with the SN74LS14N specifications.

Q: What is the significance of the propagation delay difference?

A: The DM74ALS14N has a maximum propagation delay of 12ns at 5V with 50pF load, while the SN74LS14N has 22ns at 5V with 15pF load. For general-purpose logic inversion and signal conditioning applications, this difference is typically not critical. High-speed timing-sensitive applications should evaluate whether the longer delay impacts system performance.

Q: Why is the DM74ALS14N obsolete?

A: The DM74ALS14N is classified as obsolete by onsemi. The SN74LS14N remains in active production by Texas Instruments, providing a reliable long-term alternative for new designs and legacy system support.

Q: Does the SN74LS14N meet current compliance standards?

A: Yes. The SN74LS14N is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.