DM74ALS175M Equivalent & Substitute Parts

Part Overview

The DM74ALS175M is a single-element D-type flip-flop with 4-bit configuration, manufactured by onsemi in 16-SOIC surface mount packaging. This logic component features complementary outputs, positive edge triggering, and master reset functionality. The part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	DM74ALS175M
Manufacturer	onsemi
Series	74ALS
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	4
Output Type	Complementary
Clock Frequency	50 MHz
Max Propagation Delay @ 5V, 50pF	17 ns
Trigger Type	Positive Edge
Voltage Supply Range	4.5V ~ 5.5V
Current - Output High, Low	400µA, 8mA
Current - Quiescent (Iq)	14 mA
Operating Temperature	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DM74ALS175M is determined by strict equivalence across the following critical parameters:

Logic Function: D-Type flip-flop with 1 element, 4-bit configuration
Output Configuration: Complementary outputs
Trigger Mechanism: Positive edge triggering
Control Function: Master reset capability
Electrical Performance: 50 MHz clock frequency, 17 ns maximum propagation delay at 5V with 50pF load
Electrical Characteristics: 400µA output high current, 8mA output low current, 14 mA quiescent current
Supply Voltage: 4.5V to 5.5V operating range
Temperature Range: 0°C to 70°C
Package: 16-SOIC surface mount form factor
Series Compatibility: 74ALS logic family

The substitute parts SN74ALS175D and SN74ALS175DR meet all these criteria and are manufactured by Texas Instruments under the same 74ALS series designation.

Parameter Comparison

Parameter	DM74ALS175M (onsemi)	SN74ALS175D (TI)	SN74ALS175DR (TI)
Series	74ALS	74ALS	74ALS
Type	D-Type Flip Flop	D-Type Flip Flop	D-Type Flip Flop
Number of Elements	1	1	1
Number of Bits per Element	4	4	4
Output Type	Complementary	Complementary	Complementary
Clock Frequency	50 MHz	50 MHz	50 MHz
Max Propagation Delay @ 5V, 50pF	17 ns	17 ns	17 ns
Trigger Type	Positive Edge	Positive Edge	Positive Edge
Current - Output High, Low	400µA, 8mA	400µA, 8mA	400µA, 8mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Iq)	14 mA	14 mA	14 mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74ALS175DR (Texas Instruments) is the preferred substitute for new designs and procurement. This part carries Active product status, ensuring long-term availability and manufacturing support. It is RoHS3 compliant and supplied in Tape & Reel packaging, which is standard for production environments. Inventory availability of 6,173 pieces supports volume requirements.

SN74ALS175D (Texas Instruments) serves as an alternative substitute with Last Time Buy status. This part is also RoHS3 compliant but carries a transitional product lifecycle designation. It is supplied in Tube packaging and has 2,720 pieces in stock.

The DM74ALS175M, while currently in stock (1,431 pieces), is classified as obsolete and should not be selected for new designs. Existing designs using the DM74ALS175M can transition to either Texas Instruments substitute without circuit modification, as all electrical and mechanical parameters are identical.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS175D and SN74ALS175DR be used interchangeably with DM74ALS175M?

A: Yes. Both Texas Instruments parts are direct functional and electrical equivalents. The difference between SN74ALS175D and SN74ALS175DR is packaging format only: Tube versus Tape & Reel. Both are pin-compatible and electrically identical to the DM74ALS175M.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is used for smaller quantities and manual handling. Tape & Reel packaging is used for automated assembly processes and higher-volume production. The component itself is identical; only the delivery format differs.

Q: Why is the DM74ALS175M classified as obsolete?

A: Obsolete status indicates that onsemi has discontinued manufacturing this part. While existing inventory may be available, no new production is planned. Substitution to active alternatives ensures design continuity and future availability.

Q: Are there any compliance differences between the three parts?

A: The DM74ALS175M has REACH Unaffected status. Both SN74ALS175D and SN74ALS175DR are RoHS3 compliant and REACH Unaffected. All three parts meet the same regulatory requirements for their respective manufacturing periods.

Q: What is the MSL rating and why does it matter?

A: All three parts have MSL 1 (Unlimited), meaning they have unlimited shelf life and require no special moisture control during storage or handling. This simplifies inventory management and reduces handling costs.

Q: Can I use these parts in new product designs?

A: SN74ALS175DR is recommended for new designs due to its Active status. SN74ALS175D can be used but carries Last Time Buy status. The DM74ALS175M should not be used in new designs due to obsolescence.

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