SN74HC175DR Equivalent & Substitute Parts

Part Overview

The SN74HC175DR is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, designed for digital signal processing and sequential logic applications. This 16-SOIC surface mount device contains one element with 4-bit capacity and operates across a 2V to 6V supply range. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit selection from multiple qualified manufacturers offering identical or functionally compatible alternatives within the 74HC175 logic family.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74HC175DR
Manufacturer	Texas Instruments
Base Product Number	74HC175
Type	D-Type Flip-Flop
Number of Elements	1
Number of Bits per Element	4
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage - Supply	2V ~ 6V
Clock Frequency	60 MHz
Max Propagation Delay @ 6V, 50pF	26ns
Current - Output High, Low	5.2mA, 5.2mA
Current - Quiescent (Iq)	8 µA
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC175DR is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

Base product number: 74HC175
Package type: 16-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Function: Master Reset D-Type Flip-Flop
Output type: Complementary
Number of elements: 1
Number of bits per element: 4
Trigger type: Positive Edge
Voltage supply range: 2V ~ 6V (minimum requirement)

Allowable Parameter Variations:

Clock frequency: 60 MHz or higher
Max propagation delay: 26ns or lower (faster operation acceptable)
Current output: 5.2mA or higher
Quiescent current: 8 µA or lower (lower power acceptable)
Operating temperature: -40°C minimum to 85°C minimum (extended ranges acceptable)
Input capacitance: Variations acceptable within logic family specifications

All substitute parts listed maintain functional and electrical compatibility with the SN74HC175DR within these defined parameters.

Parameter Comparison

Parameter	SN74HC175DR (TI)	SN74HC175DT (TI)	MM74HC175M (Fairchild)	MM74HC175MX (onsemi)	74HC175D (Toshiba)	74HC175D,653 (Nexperia)	MC74HC175ADG (onsemi)	MC74HC175ADR2G (onsemi)
Manufacturer	Texas Instruments	Texas Instruments	Fairchild Semiconductor	onsemi	Toshiba	Nexperia USA Inc.	onsemi	onsemi
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SO	16-SOIC	16-SOIC
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Clock Frequency	60 MHz	60 MHz	70 MHz	70 MHz	63 MHz	89 MHz	35 MHz	35 MHz
Max Propagation Delay @ 6V, 50pF	26ns	26ns	26ns	26ns	24ns	30ns	22ns	22ns
Current - Output High, Low	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA
Current - Quiescent (Iq)	8 µA	8 µA	8 µA	8 µA	4 µA	8 µA	4 µA	4 µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Selection (Parametric Equivalent): SN74HC175DT from Texas Instruments provides identical electrical and thermal specifications to the SN74HC175DR. This part maintains the same manufacturer lineage and is suitable for direct substitution when available, though it is currently discontinued at DiGi Electronics.

Active Production Alternatives:

For applications requiring extended operating temperature range (-40°C to 125°C), the 74HC175D from Toshiba Semiconductor or 74HC175D,653 from Nexperia USA Inc. are qualified selections. Both parts offer improved propagation delay performance (24ns and 30ns respectively) and maintain full RoHS3 compliance.

The MM74HC175MX from onsemi in Tape & Reel packaging offers 70 MHz clock frequency with active production status and 7,863 units in stock. This part is suitable for high-volume applications requiring tape and reel delivery format.

Extended Temperature Range Selection: MC74HC175ADG and MC74HC175ADR2G from onsemi provide the widest operating temperature range (-55°C to 125°C) with superior propagation delay (22ns). These parts are appropriate for industrial and automotive applications requiring extended thermal specifications. MC74HC175ADR2G is supplied in Tape & Reel format for automated assembly.

Compliance Verification: All listed substitute parts maintain ROHS3 compliance and EAR99 export classification. Moisture sensitivity level is rated at MSL 1 (Unlimited) across all alternatives, ensuring equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute SN74HC175DR with any 74HC175 variant? A: No. Substitution is limited to parts maintaining the 16-SOIC surface mount package, 2V to 6V supply voltage, and identical functional specifications (1 element, 4-bit D-type flip-flop with complementary outputs). Parts with different package types or supply voltage ranges are not compatible.

Q: What is the difference between SN74HC175DR and SN74HC175DT? A: Both parts are manufactured by Texas Instruments with identical electrical specifications. The primary difference is packaging format and product status. SN74HC175DT is currently discontinued at DiGi Electronics, while SN74HC175DR remains in active production.

Q: Are the onsemi MC74HC175ADG and MC74HC175ADR2G interchangeable? A: Yes, these parts are electrically identical. The difference is packaging: MC74HC175ADG is supplied in Tube format, while MC74HC175ADR2G is supplied in Tape & Reel format. Selection depends on assembly process requirements.

Q: Can I use 74HC175D,653 from Nexperia in place of SN74HC175DR? A: Yes. The 74HC175D,653 is a qualified substitute with identical functional specifications and improved propagation delay (30ns vs. 26ns). The extended operating temperature range (-40°C to 125°C) provides additional thermal margin. The primary consideration is packaging format: this part is supplied in Tape & Reel rather than Cut Tape.

Q: What is the significance of the extended temperature range in MC74HC175ADG (-55°C to 125°C)? A: The extended range provides operational capability in more demanding thermal environments, including industrial and automotive applications. If your design operates within the standard -40°C to 85°C range, this extended capability is not required but does not negatively impact performance.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance. This ensures compatibility with environmental regulations and procurement requirements for RoHS-restricted applications.

Q: What packaging formats are available for 74HC175 substitutes? A: Available formats include Cut Tape (CT) & Digi-Reel, Tape & Reel (TR), and Tube. Selection depends on assembly process: automated pick-and-place systems typically use Tape & Reel format, while manual or semi-automated processes may use Cut Tape or Tube formats.

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