CD74AC574M96 Equivalent & Substitute Parts

Part Overview

The CD74AC574M96 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-SOIC surface mount package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent functional specifications, package compatibility, and electrical parameters align within the allowed tolerance ranges for this logic device category.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74AC574M96
Manufacturer	Texas Instruments
Category	Logic
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Clock Frequency	125 MHz
Voltage - Supply	1.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CD74AC574M96 are qualified based on the following criteria:

Identical package type: 20-SOIC (0.295", 7.50mm Width) surface mount configuration
Matching functional classification: D-Type flip-flop with 1 element and 8-bit architecture
Positive edge trigger type
Tri-State or Non-Inverted output capability
Supply voltage range compatibility within specified operating parameters
Active product status with current manufacturing availability
ROHS3 compliance and equivalent regulatory certifications

The substitute parts identified (MC74AC374DWG, MC74AC374DWR2G, MC74AC377DWR2G) meet these substitution criteria through equivalent electrical performance within the 74AC logic series.

Parameter Comparison

Parameter	CD74AC574M96 (Main)	MC74AC374DWG	MC74AC374DWR2G	MC74AC377DWR2G
Manufacturer	Texas Instruments	onsemi	onsemi	onsemi
Type	D-Type	D-Type	D-Type	D-Type
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Clock Frequency	125 MHz	155 MHz	155 MHz	140 MHz
Max Propagation Delay @ 5V, 50pF	10.8ns	9.5ns	9.5ns	10ns
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	1.5V ~ 5.5V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Iq)	8 µA	8 µA	8 µA	8 µA
Input Capacitance	10 pF	4.5 pF	4.5 pF	4.5 pF
Operating Temperature	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

All identified substitute parts maintain Active product status with current manufacturing availability. The MC74AC374DWG, MC74AC374DWR2G, and MC74AC377DWR2G are manufactured by onsemi and comply with ROHS3 regulations equivalent to the main part.

The onsemi substitutes demonstrate improved clock frequency performance (140–155 MHz versus 125 MHz) and reduced propagation delay (9.5–10ns versus 10.8ns), indicating enhanced speed characteristics within the same logic family. Supply voltage range for substitutes extends to 6V maximum compared to 5.5V for the main part, providing broader operational envelope compatibility.

Operating temperature range for substitute parts is -40°C to 85°C, which is narrower than the main part specification of -55°C to 125°C. Applications requiring extended temperature operation below -40°C or above 85°C must retain the CD74AC574M96.

Moisture sensitivity level differs: the main part is MSL 1 (Unlimited), while all substitutes are MSL 3 (168 Hours). This affects storage and handling protocols in high-humidity environments.

Frequently Asked Questions (FAQ)

Q: Can MC74AC374DWR2G replace CD74AC574M96 in all applications?

A: MC74AC374DWR2G is functionally equivalent for applications within the operating temperature range of -40°C to 85°C and supply voltage range of 2V to 6V. The substitute offers superior clock frequency and propagation delay performance. Applications requiring operation below -40°C or above 85°C must use the CD74AC574M96.

Q: What is the difference between MC74AC374DWG and MC74AC374DWR2G?

A: Both parts are identical in electrical specifications and package type (20-SOIC). The primary difference is packaging format: MC74AC374DWG is supplied in Tube packaging, while MC74AC374DWR2G is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and quantity needs.

Q: Why does MC74AC377DWR2G have a different base product number?

A: MC74AC377DWR2G is based on the 74AC377 product line rather than 74AC374. Both are 8-bit D-Type flip-flops in identical 20-SOIC packages with equivalent electrical performance. The functional difference lies in internal architecture, but both meet the substitution criteria for the CD74AC574M96 within specified parameter ranges.

Q: Are there temperature or humidity storage considerations when switching to onsemi substitutes?

A: Yes. The CD74AC574M96 has MSL 1 rating (Unlimited moisture sensitivity), while onsemi substitutes are MSL 3 (168 Hours). MSL 3 components require controlled storage conditions and have a 168-hour floor life after moisture exposure. Verify storage and handling protocols match your manufacturing environment before implementation.

Q: Do the substitute parts require PCB layout modifications?

A: No. All substitute parts use identical 20-SOIC (0.295", 7.50mm Width) surface mount packaging. PCB footprints, pin assignments, and layout requirements remain unchanged. Direct board-level substitution is supported without design modifications.

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