SN74ACT08N-NG Equivalent & Substitute Parts

Part Overview

The SN74ACT08N-NG is a 4-channel 2-input AND Gate logic integrated circuit manufactured by Texas Instruments in the 74ACT series. This device is classified as Obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The SN74ACT08N-NG operates within the 4.5V to 5.5V supply voltage range and is packaged in a 14-DIP through-hole configuration suitable for breadboard and PCB prototyping applications.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	9ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Series	74ACT
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SN74ACT08N-NG are identified based on strict electrical and mechanical parameter equivalence within the 74ACT logic family. All substitute candidates maintain identical functional specifications across the following critical parameters:

Logic Type: AND Gate
Number of Circuits: 4
Number of Inputs: 2
Voltage - Supply: 4.5V ~ 5.5V
Current - Quiescent (Max): 2 µA
Current - Output High, Low: 24mA, 24mA
Input Logic Level - Low: 0.8V
Input Logic Level - High: 2V
Max Propagation Delay @ V, Max CL: 9ns @ 5V, 50pF
Operating Temperature: -40°C ~ 85°C
Series: 74ACT
RoHS Status: ROHS3 Compliant

Substitutes are differentiated by packaging type and product status. The SN74ACT08N-NG (Obsolete, 14-DIP through-hole) has two active equivalents: SN74ACT08PWR (Active, 14-TSSOP surface mount) and SN74ACT08N (Active, 14-DIP through-hole). Both maintain full electrical compatibility while offering improved availability and compliance status.

Parameter Comparison

Parameter	SN74ACT08N-NG (Main)	SN74ACT08PWR (Substitute)	SN74ACT08N (Substitute)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	AND Gate	AND Gate	AND Gate
Number of Circuits	4	4	4
Number of Inputs	2	2	2
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA	2 µA	2 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.8V	0.8V	0.8V
Input Logic Level - High	2V	2V	2V
Max Propagation Delay @ V, Max CL	9ns @ 5V, 50pF	9ns @ 5V, 50pF	9ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Series	74ACT	74ACT	74ACT
Product Status	Obsolete	Active	Active
Mounting Type	Through Hole	Surface Mount	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-TSSOP (0.173", 4.40mm Width)	14-DIP (0.300", 7.62mm)
Packaging	-	Tape & Reel (TR)	Tube
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Through-Hole PCB Applications: Select SN74ACT08N as the primary substitute for SN74ACT08N-NG. Both devices share identical 14-DIP through-hole packaging and electrical specifications. SN74ACT08N maintains Active product status, ensuring long-term availability and supply chain continuity. This substitution requires no PCB layout modifications and provides direct pin-for-pin compatibility.

For Surface Mount PCB Applications: Select SN74ACT08PWR when redesigning for surface mount technology. This device maintains all electrical parameters of the original SN74ACT08N-NG while offering 14-TSSOP packaging. SN74ACT08PWR is classified as Active and includes Tape & Reel packaging suitable for automated assembly processes. PCB layout redesign is required due to package footprint differences.

Compliance Considerations: Both substitute parts maintain ROHS3 compliance status equivalent to the original SN74ACT08N-NG. SN74ACT08PWR includes additional compliance documentation (REACH Unaffected, ECCN: EAR99, HTSUS: 8542.39.0001) suitable for international procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT08PWR replace SN74ACT08N-NG in existing through-hole designs? A: No. SN74ACT08PWR uses 14-TSSOP surface mount packaging, which is incompatible with through-hole PCB layouts. SN74ACT08N is the appropriate through-hole substitute.

Q: Are the electrical characteristics identical between all three parts? A: Yes. SN74ACT08N-NG, SN74ACT08PWR, and SN74ACT08N share identical electrical specifications including supply voltage (4.5V ~ 5.5V), propagation delay (9ns @ 5V, 50pF), output current (24mA), and operating temperature range (-40°C ~ 85°C).

Q: What is the primary difference between SN74ACT08N and SN74ACT08PWR? A: The primary difference is packaging. SN74ACT08N uses 14-DIP through-hole configuration, while SN74ACT08PWR uses 14-TSSOP surface mount configuration. Both are Active products with identical electrical performance.

Q: Why is SN74ACT08N-NG classified as Obsolete? A: Product obsolescence reflects Texas Instruments' discontinuation of this specific part number variant. Active equivalents (SN74ACT08N and SN74ACT08PWR) provide continued access to the same logic functionality.

Q: Are there inventory differences between the substitute parts? A: Yes. SN74ACT08N-NG has 770 Pcs in stock, SN74ACT08PWR has 4400 Pcs, and SN74ACT08N has 3400 Pcs. Availability may vary by supplier and time.

Q: Do the substitute parts require different PCB design considerations? A: SN74ACT08N requires no design changes from SN74ACT08N-NG due to identical 14-DIP packaging. SN74ACT08PWR requires PCB footprint redesign due to 14-TSSOP surface mount configuration, but electrical circuit design remains unchanged.

Q: What is the moisture sensitivity level for each part? A: SN74ACT08N-NG and SN74ACT08N have MSL Not Applicable. SN74ACT08PWR has MSL 1 (Unlimited), indicating superior moisture resistance for surface mount applications.

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