DM74ALS133M NAND Gate IC Equivalent & Substitute Parts

Part Overview

The DM74ALS133M is a 13-input NAND gate logic IC manufactured by onsemi in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The 74ALS logic family provides standard TTL-compatible switching functionality with defined electrical characteristics suitable for digital logic applications requiring NAND gate operations.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	1
Number of Inputs	13
Voltage Supply Range	4.5V ~ 5.5V
Output Current (High/Low)	400µA / 8mA
Input Logic Level Low	0.8V
Input Logic Level High	2V
Max Propagation Delay	25ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package	16-SOIC
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DM74ALS133M is determined by strict equivalence across the following parameters: logic type (NAND gate), number of circuits (1), number of inputs (13), supply voltage range (4.5V ~ 5.5V), output current specifications (400µA high, 8mA low), input logic levels (0.8V low, 2V high), propagation delay (25ns @ 5V, 50pF), operating temperature range (0°C ~ 70°C), and surface mount technology. Package variations within the 16-SOIC family are permitted when mechanical dimensions remain compatible with the application footprint.

The substitute parts are classified as follows:

Direct Manufacturer Equivalent: SN74ALS133DR (Texas Instruments) — identical electrical specifications and 16-SOIC (0.154", 3.90mm) package footprint.

Similar Equivalent with Package Variation: SN74ALS133NSR (Texas Instruments) — identical electrical specifications with 16-SO package (0.209", 5.30mm width) supplied in Tape & Reel format.

Parametric Equivalent: SN74ALS133D (Texas Instruments) — identical electrical specifications and 16-SOIC (0.154", 3.90mm) package footprint, supplied in Tube packaging.

Parameter Comparison

Parameter	DM74ALS133M (onsemi)	SN74ALS133DR (TI)	SN74ALS133NSR (TI)	SN74ALS133D (TI)
Logic Type	NAND Gate	NAND Gate	NAND Gate	NAND Gate
Number of Inputs	13	13	13	13
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Output Current (High/Low)	400µA / 8mA	400µA / 8mA	400µA / 8mA	400µA / 8mA
Input Logic Level Low	0.8V	0.8V	0.8V	0.8V
Input Logic Level High	2V	2V	2V	2V
Max Propagation Delay	25ns @ 5V, 50pF	25ns @ 5V, 50pF	25ns @ 5V, 50pF	25ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.209", 5.30mm)	16-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Last Time Buy
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity	MSL 1 (Unlimited)	MSL 1 (Unlimited)	MSL 1 (Unlimited)	MSL 1 (Unlimited)

Engineering Selection Recommendations

For new designs and production transitions from the obsolete DM74ALS133M, the SN74ALS133DR (Texas Instruments, Active status) is the primary recommended substitute. This part maintains identical electrical performance and mechanical compatibility with the original 16-SOIC (0.154", 3.90mm) footprint, enabling direct PCB layout compatibility without redesign.

The SN74ALS133NSR offers an alternative for applications where Tape & Reel packaging is preferred for automated assembly. The wider 16-SO package (0.209", 5.30mm) requires verification of PCB footprint compatibility before selection.

The SN74ALS133D (Last Time Buy status) remains available but is approaching end-of-life. This part is suitable for legacy production support or inventory replenishment only. All three Texas Instruments substitutes carry ROHS3 compliance certification, meeting current environmental regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS133DR be used as a direct replacement for DM74ALS133M?

A: Yes. The SN74ALS133DR is electrically and mechanically equivalent. All critical parameters—logic function, input/output specifications, propagation delay, and supply voltage—are identical. The 16-SOIC package footprint (0.154", 3.90mm width) matches the original, allowing direct PCB substitution without layout modification.

Q: What is the difference between SN74ALS133DR and SN74ALS133NSR?

A: Both parts are electrically identical. The primary difference is packaging format and mechanical dimensions. The SN74ALS133DR uses standard 16-SOIC (0.154", 3.90mm) packaging, while the SN74ALS133NSR uses 16-SO (0.209", 5.30mm) packaging supplied in Tape & Reel format. PCB footprint compatibility must be verified before selecting the NSR variant.

Q: Why is the DM74ALS133M marked as obsolete?

A: The DM74ALS133M has reached end-of-life status with onsemi. Texas Instruments continues active production of functionally equivalent 74ALS133 variants, making the TI parts the recommended source for ongoing supply.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three Texas Instruments substitutes (SN74ALS133DR, SN74ALS133NSR, and SN74ALS133D) carry ROHS3 compliance certification. The original DM74ALS133M RoHS status is not specified in available documentation.

Q: Can I use SN74ALS133D for new production?

A: The SN74ALS133D is classified as Last Time Buy, indicating limited remaining availability. While electrically and mechanically equivalent to the DM74ALS133M, it is not recommended for new production designs. Use SN74ALS133DR (Active status) for new projects to ensure long-term supply continuity.

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

A: All parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special environmental controls.

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