74HC574D,652 Equivalent & Substitute Parts

Part Overview

The 74HC574D,652 is a D-Type flip-flop logic integrated circuit manufactured by Nexperia USA Inc., configured as a single 8-bit element with tri-state, non-inverted output. This component operates as a positive edge-triggered storage device in the 74HC logic family, housed in a 20-SOIC surface mount package. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Part Number	74HC574D,652
Manufacturer	Nexperia USA Inc.
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Trigger Type	Positive Edge
Clock Frequency	133 MHz
Max Propagation Delay @ 6V, 50pF	26 ns
Voltage Supply Range	2V to 6V
Current Output High/Low	7.8 mA / 7.8 mA
Quiescent Current (Iq)	8 µA
Input Capacitance	4.6 pF
Operating Temperature Range	-40°C to 125°C
Package Type	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC574D,652 is determined by the following critical parameters:

Functional Compatibility Requirements:

Type: D-Type flip-flop
Number of Elements: 1
Number of Bits per Element: 8
Output Type: Tri-State, Non-Inverted
Trigger Type: Positive Edge
Package Type: 20-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount

Electrical Performance Parameters:

Voltage Supply Range: 2V to 6V (must encompass or match)
Clock Frequency: 133 MHz (reference specification)
Max Propagation Delay: 26 ns @ 6V, 50pF (reference specification)
Current Output High/Low: 7.8 mA / 7.8 mA
Operating Temperature Range: -40°C to 125°C (must encompass or match)

Substitute parts meeting these criteria are functionally interchangeable at the circuit level. Variations in quiescent current, input capacitance, and propagation delay under different load conditions do not preclude substitution when the primary electrical specifications remain within acceptable design margins.

Parameter Comparison

Part Number	Manufacturer	Clock Frequency (MHz)	Max Propagation Delay @ 6V (ns)	Quiescent Current (µA)	Operating Temp Range (°C)	Product Status	RoHS Status
74HC574D,652	Nexperia USA Inc.	133	26 @ 50pF	8	-40 to 125	Obsolete	ROHS3 Compliant
74HC574D,653	Nexperia USA Inc.	133	26 @ 50pF	8	-40 to 125	Active	ROHS3 Compliant
74HC574D	Toshiba Semiconductor and Storage	59	33 @ 150pF	4	-40 to 85	Active	ROHS3 Compliant
CD74HC574M	Harris Corporation	60	28 @ 50pF	8	-55 to 125	Obsolete	RoHS Non-Compliant
CD74HC574M96	Texas Instruments	60	28 @ 50pF	8	-55 to 125	Active	ROHS3 Compliant
MC74HC574ADWG	onsemi	35	27 @ 50pF	4	-55 to 125	Active	ROHS3 Compliant
MC74HC574ADWR2G	onsemi	35	27 @ 50pF	4	-55 to 125	Active	ROHS3 Compliant
MM74HC574WM	Fairchild Semiconductor	35	27 @ 150pF	8	-40 to 85	Active	ROHS3 Compliant
SN74HC574DW	Texas Instruments	36	46 @ 150pF	8	-40 to 85	Discontinued at DiGi Electronics	ROHS3 Compliant
SN74HC574DWR	Texas Instruments	36	46 @ 150pF	8	-40 to 85	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

74HC574D,653 (Nexperia USA Inc.) is the direct functional equivalent with identical electrical specifications. This part maintains active product status and ROHS3 compliance, making it the preferred replacement for the obsolete 74HC574D,652.

CD74HC574M96 (Texas Instruments) and MC74HC574ADWG or MC74HC574ADWR2G (onsemi) are active alternatives meeting all functional requirements. These parts feature extended operating temperature ranges (-55°C to 125°C) and maintain ROHS3 compliance. Propagation delay specifications remain within acceptable margins for most applications.

Secondary Substitutes (Conditional Compatibility):

74HC574D (Toshiba Semiconductor and Storage) operates within the 74HC logic family with identical functional configuration. Operating temperature range is limited to -40°C to 85°C, requiring verification against application requirements. This part is suitable for commercial and industrial temperature range applications.

SN74HC574DWR (Texas Instruments) is an active product with ROHS3 compliance. Propagation delay is specified at 46 ns @ 150pF, representing a performance trade-off compared to the original specification. This part is suitable for applications where timing margins accommodate the increased delay.

MM74HC574WM (Fairchild Semiconductor) maintains active status with ROHS3 compliance. Operating temperature range is -40°C to 85°C. This part is suitable for commercial and industrial applications.

Obsolete Parts (Not Recommended for New Designs):

CD74HC574M (Harris Corporation) is obsolete and RoHS non-compliant. This part should not be selected for new designs or long-term procurement.

SN74HC574DW (Texas Instruments) is discontinued at DiGi Electronics. Availability is limited and declining.

Frequently Asked Questions (FAQ)

Q: Can I use 74HC574D,653 as a direct replacement for 74HC574D,652?

A: Yes. Both parts are manufactured by Nexperia USA Inc. with identical electrical specifications, functional configuration, and package type. The primary difference is product status: 74HC574D,653 is active while 74HC574D,652 is obsolete. 74HC574D,653 is the recommended direct replacement.

Q: What is the difference between the various substitute parts?

A: All substitute parts function as 8-bit D-Type flip-flops in 20-SOIC packages with tri-state, non-inverted outputs. Differences exist in clock frequency ratings, propagation delay specifications, quiescent current, operating temperature ranges, and manufacturer. These variations reflect different design margins and manufacturing processes across manufacturers.

Q: Are there temperature range limitations I should consider?

A: Yes. The original 74HC574D,652 operates from -40°C to 125°C. Some substitutes (74HC574D from Toshiba, MM74HC574WM from Fairchild, SN74HC574DW/DWR from Texas Instruments) are limited to -40°C to 85°C. Verify your application's temperature requirements before selecting a substitute with a narrower range.

Q: Does propagation delay variation affect circuit performance?

A: Propagation delay is specified under specific load conditions (voltage and capacitance). The original part specifies 26 ns @ 6V, 50pF. Substitutes range from 27 ns to 46 ns depending on load conditions. Verify that your circuit timing margins accommodate the substitute part's propagation delay specification.

Q: Are all substitute parts RoHS compliant?

A: Most substitutes are ROHS3 compliant. CD74HC574M (Harris Corporation) is RoHS non-compliant and should not be used in applications requiring RoHS compliance. Verify compliance requirements for your application.

Q: What packaging options are available?

A: All listed parts use the 20-SOIC (0.295", 7.50mm Width) surface mount package. Packaging variations (Tape & Reel, Cut Tape, Tube, Bulk) affect procurement and handling but do not impact electrical or functional compatibility.

Q: Can I use parts with lower quiescent current specifications?

A: Yes. Lower quiescent current (4 µA vs. 8 µA) represents improved power efficiency and does not affect functional compatibility. Parts with lower Iq are suitable for power-sensitive applications.

Q: Which substitute should I choose for new designs?

A: For new designs, select from active products with ROHS3 compliance: 74HC574D,653 (Nexperia), CD74HC574M96 (Texas Instruments), MC74HC574ADWG or MC74HC574ADWR2G (onsemi), or SN74HC574DWR (Texas Instruments). Verify operating temperature range and propagation delay specifications against your application requirements.

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