SN74AC74NE4 Equivalent & Substitute Parts

Part Overview

The SN74AC74NE4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments. This device functions as a 2-element D-type flip-flop with 1-bit per element, featuring complementary outputs and set/reset control. The part operates with positive edge triggering and is housed in a 14-DIP through-hole package.

The SN74AC74NE4 is classified as an active product with full RoHS3 compliance and REACH unaffected status. Identifying equivalent substitute parts is necessary for supply chain continuity, inventory optimization, and design flexibility when the primary part number becomes unavailable or when alternative packaging or supplier options are required.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Series	74AC
Type	D-Type Flip-Flop
Number of Elements	2
Number of Bits per Element	1
Output Type	Complementary
Clock Frequency	160 MHz
Max Propagation Delay @ 5V, 50pF	10 ns
Trigger Type	Positive Edge
Voltage Supply Range	2V to 6V
Current Output High/Low	24 mA / 24 mA
Quiescent Current (Iq)	2 µA
Input Capacitance	3 pF
Operating Temperature Range	-40°C to 85°C
Package Type	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AC74NE4 is determined by strict parametric equivalence across the following critical criteria:

Functional Parameters: Device type (D-type flip-flop), number of elements (2), bits per element (1), output configuration (complementary), and trigger mechanism (positive edge) must be identical.

Electrical Parameters: Clock frequency (160 MHz), maximum propagation delay (10 ns @ 5V, 50pF), voltage supply range (2V to 6V), output current capability (24 mA high/low), quiescent current (2 µA), and input capacitance (3 pF) must match exactly.

Physical Parameters: Package type (14-DIP with 0.300" / 7.62mm pitch) and mounting type (through hole) must be identical.

Compliance Parameters: RoHS3 compliance and REACH unaffected status must be maintained.

Only parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Parameter	SN74AC74NE4	SN74AC74N
Manufacturer	Texas Instruments	Texas Instruments
Series	74AC	74AC
Type	D-Type Flip-Flop	D-Type Flip-Flop
Number of Elements	2	2
Number of Bits per Element	1	1
Output Type	Complementary	Complementary
Clock Frequency	160 MHz	160 MHz
Max Propagation Delay @ 5V, 50pF	10 ns	10 ns
Trigger Type	Positive Edge	Positive Edge
Voltage Supply Range	2V to 6V	2V to 6V
Current Output High/Low	24 mA / 24 mA	24 mA / 24 mA
Quiescent Current (Iq)	2 µA	2 µA
Input Capacitance	3 pF	3 pF
Operating Temperature Range	-40°C to 85°C	-40°C to 85°C
Package Type	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Active

Engineering Selection Recommendations

The SN74AC74N is a direct parametric equivalent to the SN74AC74NE4. Both parts are manufactured by Texas Instruments, belong to the 74AC logic series, and share identical electrical, functional, and physical specifications. Both devices maintain active product status with full RoHS3 compliance and REACH unaffected designation.

The primary distinction between these parts is the packaging designation suffix. The SN74AC74NE4 includes the "E4" suffix indicating tube packaging, while the SN74AC74N uses the standard "N" suffix also indicating tube packaging. Both parts are supplied in 14-PDIP packages suitable for through-hole mounting applications.

Selection between these equivalent parts may be based on inventory availability, supplier lead times, or organizational procurement preferences. Both parts are suitable for direct substitution in applications requiring dual D-type flip-flops with complementary outputs, positive edge triggering, and the specified electrical performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the SN74AC74N be used as a direct replacement for the SN74AC74NE4?

A: Yes. The SN74AC74N is a parametric equivalent. All electrical specifications, functional characteristics, package dimensions, and compliance certifications are identical. Direct substitution is supported without circuit modification.

Q: What is the difference between the SN74AC74NE4 and SN74AC74N part numbers?

A: Both parts are identical in specification and function. The difference lies in packaging designation suffixes used by Texas Instruments for inventory and distribution tracking. Both are supplied in 14-DIP through-hole packages.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the SN74AC74NE4 and SN74AC74N are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the maximum clock frequency for these devices?

A: Both devices support a maximum clock frequency of 160 MHz with a maximum propagation delay of 10 nanoseconds at 5V with 50pF load capacitance.

Q: Can these parts operate at different supply voltages?

A: Yes. Both devices operate across a supply voltage range of 2V to 6V, providing flexibility for various circuit applications and power supply configurations.

Q: What is the operating temperature range?

A: Both the SN74AC74NE4 and SN74AC74N operate across a temperature range of -40°C to 85°C, suitable for industrial and commercial applications.

Q: Are these parts suitable for through-hole PCB assembly?

A: Yes. Both parts are housed in 14-DIP packages with 0.300-inch (7.62mm) pitch and are designed for through-hole mounting on printed circuit boards.

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