SN74AC534PWR Equivalent & Substitute Parts

Part Overview

The SN74AC534PWR 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-TSSOP surface mount package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching functional characteristics, electrical parameters, and package specifications to ensure direct compatibility in circuit applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74AC534PWR
Manufacturer	Texas Instruments
Series	74AC
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Voltage - Supply	2V ~ 6V
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the SN74AC534PWR are identified based on the following criteria:

Matching Parameters (Required for Substitution):

Series: 74AC
Type: D-Type Flip Flop
Number of Elements: 1
Number of Bits per Element: 8
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
Voltage - Supply: 2V ~ 6V
Operating Temperature: -40°C ~ 85°C (TA)
Trigger Type: Positive Edge
Current - Output High, Low: 24mA, 24mA
Input Capacitance: 4.5 pF
RoHS Status: ROHS3 Compliant
Product Status: Active

Allowable Variations:

Output Type: Tri-State Inverted, Tri-State Non-Inverted, or Non-Inverted
Clock Frequency: 95 MHz to 155 MHz
Max Propagation Delay @ 5V, 50pF: 9.5ns to 10.5ns
Current - Quiescent (Iq): 4 µA to 8 µA
Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Tube

Parameter Comparison

Parameter	SN74AC534PWR	MC74AC374DTR2G	MC74AC377DTG	MC74AC377DTR2G	MC74AC574DTR2G
Manufacturer	Texas Instruments	onsemi	onsemi	onsemi	onsemi
Base Product Number	74AC534	74AC374	74AC377	74AC377	74AC574
Package / Case	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Tube	Tape & Reel (TR)	Tape & Reel (TR)
Output Type	Tri-State, Inverted	Tri-State, Non-Inverted	Non-Inverted	Non-Inverted	Tri-State, Non-Inverted
Clock Frequency	150 MHz	155 MHz	140 MHz	140 MHz	95 MHz
Max Propagation Delay @ 5V, 50pF	10.5ns	9.5ns	10ns	10ns	9.5ns
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Iq)	4 µA	8 µA	8 µA	8 µA	8 µA
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity. Selection between substitute options depends on specific application requirements:

MC74AC374DTR2G provides the highest clock frequency (155 MHz) and lowest propagation delay (9.5ns) with tri-state non-inverted output in Cut Tape packaging format.

MC74AC377DTG and MC74AC377DTR2G offer non-inverted output configuration with 140 MHz clock frequency. MC74AC377DTG is supplied in Tube format, while MC74AC377DTR2G is supplied in Tape & Reel format matching the original packaging of SN74AC534PWR.

MC74AC574DTR2G provides tri-state non-inverted output with the lowest clock frequency (95 MHz) in Tape & Reel packaging, suitable for applications with relaxed timing requirements.

Frequently Asked Questions (FAQ)

Q: Can MC74AC374DTR2G directly replace SN74AC534PWR?

A: MC74AC374DTR2G is functionally compatible based on matching package, voltage supply, operating temperature, and trigger type. The primary difference is output type: SN74AC534PWR provides tri-state inverted output, while MC74AC374DTR2G provides tri-state non-inverted output. Circuit design must accommodate this output polarity difference.

Q: What is the significance of packaging format differences (Tape & Reel, Cut Tape, Tube)?

A: Packaging format affects handling and assembly processes. Tape & Reel (TR) is standard for automated pick-and-place assembly. Cut Tape (CT) is suitable for manual assembly or lower-volume applications. Tube packaging is used for manual handling and lower-volume distribution. Electrical and functional performance are identical across packaging formats.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts are ROHS3 compliant, matching the compliance status of SN74AC534PWR.

Q: How do clock frequency differences affect substitution?

A: Clock frequency represents the maximum operating speed. Substitute parts with equal or higher clock frequency (MC74AC374DTR2G at 155 MHz, MC74AC377 variants at 140 MHz) are suitable for applications operating at or below the original part's 150 MHz specification. MC74AC574DTR2G at 95 MHz is suitable only for applications with timing requirements below 95 MHz.

Q: What does output type variation mean for circuit compatibility?

A: Output type determines signal polarity. Tri-state inverted output (SN74AC534PWR) inverts the input signal. Tri-state non-inverted output (MC74AC374DTR2G, MC74AC574DTR2G) and non-inverted output (MC74AC377 variants) preserve input signal polarity. Circuit design must account for these differences in logic flow.

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