CD74HC175M Equivalent & Substitute Parts

Part Overview

The CD74HC175M is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 4-bit configuration and complementary output type. This part is classified as Last Time Buy, indicating it is no longer in active production. The device operates across a supply voltage range of 2V to 6V with a maximum propagation delay of 30ns at 6V with 50pF load and a clock frequency of 35 MHz. Finding equivalent and substitute parts is necessary due to the Last Time Buy status, which may result in limited availability and extended lead times.

Key Parameters

Parameter	Value
Base Product Number	74HC175
Function	Master Reset
Type	D-Type
Output Type	Complementary
Number of Elements	1
Number of Bits per Element	4
Clock Frequency	35 MHz
Max Propagation Delay @ 6V, 50pF	30ns
Trigger Type	Positive Edge
Voltage - Supply	2V ~ 6V
Current - Output High, Low	5.2mA, 5.2mA
Current - Quiescent (Iq)	8 µA
Input Capacitance	10 pF
Operating Temperature	-55°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD74HC175M is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

Base product number must be 74HC175
Function: Master Reset
Type: D-Type flip-flop
Output type: Complementary
Number of elements: 1
Number of bits per element: 4
Trigger type: Positive Edge
Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Voltage supply range: 2V ~ 6V
Current output specifications: 5.2mA (High and Low)

Acceptable Variations:

Clock frequency may vary (35 MHz to 89 MHz)
Propagation delay may vary (22ns to 30ns at 6V, 50pF)
Quiescent current may vary (4 µA to 8 µA)
Input capacitance may vary (3 pF to 10 pF)
Operating temperature range may be narrower than the original
Packaging format (Tube, Tape & Reel, Cut Tape) may differ
Product status may be Active (preferred over Last Time Buy)
Manufacturer may differ

Parameter Comparison

Part Number	Manufacturer	Product Status	Clock Frequency	Max Propagation Delay @ 6V, 50pF	Quiescent Current (Iq)	Input Capacitance	Operating Temperature	Packaging
CD74HC175M	Texas Instruments	Last Time Buy	35 MHz	30ns	8 µA	10 pF	-55°C ~ 125°C	Tube
CD74HC175M96	Texas Instruments	Active	35 MHz	30ns	8 µA	10 pF	-55°C ~ 125°C	Tape & Reel
74HC175D	Toshiba Semiconductor and Storage	Active	63 MHz	24ns	4 µA	3 pF	-40°C ~ 125°C	Cut Tape & Digi-Reel
74HC175D,653	Nexperia USA Inc.	Active	89 MHz	30ns	8 µA	4.6 pF	-40°C ~ 125°C	Tape & Reel
74HC175D-Q100J	Nexperia USA Inc.	Active	89 MHz	30ns	8 µA	4.6 pF	-40°C ~ 125°C	Tape & Reel
MC74HC175ADR2G	onsemi	Active	35 MHz	22ns	4 µA	10 pF	-55°C ~ 125°C	Tape & Reel
MM74HC175M	Fairchild Semiconductor	Active	70 MHz	26ns	8 µA	5 pF	-40°C ~ 85°C	Surface Mount
MM74HC175MX	onsemi	Active	70 MHz	26ns	8 µA	5 pF	-40°C ~ 85°C	Tape & Reel
MC74HC175ADG	onsemi	Active	35 MHz	22ns	4 µA	10 pF	-55°C ~ 125°C	Tube

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Identical Specifications): CD74HC175M96 is the primary substitute, offering identical electrical specifications to the original part with Active product status. This part maintains the same clock frequency (35 MHz), propagation delay (30ns), quiescent current (8 µA), and input capacitance (10 pF). The only difference is packaging format (Tape & Reel instead of Tube), which does not affect electrical performance.

Tier 2 - Parametric Equivalents (Enhanced Performance): MC74HC175ADR2G and MC74HC175ADG from onsemi provide improved propagation delay (22ns versus 30ns) while maintaining identical clock frequency, supply voltage range, and operating temperature range. These parts feature lower quiescent current (4 µA versus 8 µA), reducing power consumption. Both are Active status parts with full RoHS3 compliance.

Tier 3 - Functional Equivalents (Broader Operating Range): 74HC175D from Toshiba, 74HC175D,653 from Nexperia, and MM74HC175M/MM74HC175MX from onsemi/Fairchild are functionally equivalent with all critical parameters met. These parts feature higher clock frequencies (63 MHz to 89 MHz) and improved propagation delays (24ns to 26ns). Operating temperature ranges are narrower (-40°C minimum instead of -55°C), which may be acceptable for many applications.

Automotive Grade Option: 74HC175D-Q100J from Nexperia is qualified to AEC-Q100 automotive standards, suitable for applications requiring automotive-grade components.

Compliance Considerations: All substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can I use CD74HC175M96 as a direct replacement for CD74HC175M? A: Yes. CD74HC175M96 is electrically identical to CD74HC175M, with the same clock frequency, propagation delay, quiescent current, and input capacitance. The only difference is packaging format (Tape & Reel versus Tube), which does not affect circuit performance.

Q: What is the advantage of using MC74HC175ADR2G or MC74HC175ADG? A: These onsemi parts offer improved propagation delay (22ns versus 30ns) and lower quiescent current (4 µA versus 8 µA), resulting in faster switching and reduced power consumption. Both maintain the same supply voltage range and operating temperature range as the original part.

Q: Are the Nexperia 74HC175D,653 and 74HC175D-Q100J suitable replacements? A: Yes, both are functionally equivalent with all critical parameters met. The 74HC175D,653 is standard industrial grade, while 74HC175D-Q100J is automotive qualified (AEC-Q100). Both feature higher clock frequencies (89 MHz) and improved propagation delays (30ns). The operating temperature minimum is -40°C instead of -55°C.

Q: Does packaging format affect electrical performance? A: No. Tube, Tape & Reel, and Cut Tape packaging formats do not affect electrical specifications. Selection should be based on manufacturing process requirements and inventory management practices.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with standard manufacturing and environmental requirements.

Q: What is the difference between the Fairchild MM74HC175M and onsemi MM74HC175MX? A: Both parts are electrically identical with 70 MHz clock frequency and 26ns propagation delay. The primary difference is packaging format (Fairchild offers standard Surface Mount, while onsemi provides Tape & Reel format). Both are Active status parts.

Q: Can I use parts with narrower operating temperature ranges? A: Parts with -40°C to 85°C or -40°C to 125°C ranges are suitable if your application does not require operation below -40°C. Verify your system's temperature requirements before selection.

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