DM74ALS163BN Equivalent & Substitute Parts

Part Overview

The DM74ALS163BN is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-DIP package. This component functions as a synchronous, positive-edge-triggered counter with a maximum count rate of 40 MHz and operates within a 4.5 V to 5.5 V supply voltage range. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.

Substiute Parts

DM74ALS163BN

onsemiIn Stock: 1541DM74ALS163BN Datasheet

Current PartRFQ

SN74ALS163BN

Texas InstrumentsIn Stock: 3601SN74ALS163BN Datasheet

Parametric EquivalentRFQ

SN74AS163N

Texas InstrumentsIn Stock: 2824SN74AS163N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74ALS163BN is determined by strict equivalence across the following critical parameters: logic type (binary counter), bit width (4-bit), count direction (up), reset type (synchronous), timing architecture (synchronous), trigger mechanism (positive edge), count rate (40 MHz), supply voltage range (4.5 V ~ 5.5 V), operating temperature range (0°C ~ 70°C), and physical package format (16-DIP through-hole).

The identified substitute parts—SN74ALS163BN and SN74AS163N—maintain full parametric alignment across all specified electrical and mechanical characteristics. Both parts are manufactured by Texas Instruments and remain in active production status, providing direct functional replacement capability for the obsolete onsemi DM74ALS163BN.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the DM74ALS163BN, the SN74ALS163BN (Texas Instruments) represents the direct equivalent substitute. This part maintains identical series designation (74ALS), electrical specifications, and package format while offering the advantage of active production status and ROHS3 compliance certification.

The SN74AS163N (Texas Instruments) provides an alternative substitute within the 74-series logic family. While classified under the 74AS series rather than 74ALS, it maintains full parametric equivalence across all functional and electrical characteristics. The 74AS series typically exhibits faster propagation delays compared to 74ALS logic, making it suitable for applications where improved timing performance is beneficial or neutral.

Both Texas Instruments substitutes carry REACH Unaffected status and EAR99 export classification, matching the compliance profile of the original component.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS163BN and SN74AS163N be used interchangeably with DM74ALS163BN?

A: Both parts are parametrically equivalent across all specified electrical and mechanical parameters. Pin configuration, logic function, timing characteristics, and package dimensions are identical. Direct substitution is supported without circuit modification.

Q: What is the difference between the 74ALS and 74AS logic families?

A: Both families operate within the same supply voltage (4.5 V ~ 5.5 V) and temperature range (0°C ~ 70°C). The 74AS series typically provides faster propagation delays. For the DM74ALS163BN counter function, both families deliver the specified 40 MHz count rate and synchronous operation.

Q: Are there any compliance or certification differences between the substitutes?

A: The SN74ALS163BN carries ROHS3 compliance certification. Both Texas Instruments parts maintain REACH Unaffected status. The original onsemi DM74ALS163BN is classified as Moisture Sensitivity Level 1 (Unlimited), while the TI substitutes are not subject to moisture sensitivity classification.

Q: Will the through-hole 16-DIP package fit existing PCB layouts?

A: All three parts use identical 16-DIP (0.300", 7.62mm) through-hole packaging. PCB footprints and mounting requirements are fully compatible without layout modification.

Q: What inventory status should I consider for procurement?

A: The SN74ALS163BN (TI) has 3500 units in stock, and the SN74AS163N (TI) has 2814 units available. Both represent active production components with established supply chains, contrasting with the obsolete status of the original DM74ALS163BN.