74ACTQ08SJX AND Gate IC Equivalent & Substitute Parts

Part Overview

The 74ACTQ08SJX is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-SOP surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74ACTQ08SJX operates within the 74ACT logic family standard, which defines compatible electrical and mechanical parameters for direct substitution across multiple manufacturers.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	4.5V ~ 5.5V
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)

Substitute Part Grouping Explanation

Substitution of the 74ACTQ08SJX is determined by strict adherence to the 74ACT logic family standard. All substitute parts must maintain identical electrical specifications: 4.5V to 5.5V supply voltage, 24mA output current capability, and matching input logic thresholds. The critical substitution parameters are:

Logic family and base product number (74ACT08)
Number of circuits (4) and inputs per circuit (2)
Supply voltage range (4.5V ~ 5.5V)
Output current ratings (24mA high and low)
Input logic levels (0.8V low, 2V high)
Operating temperature range compatibility
Surface mount packaging with 14-pin SOIC configuration

Substitute parts are grouped by manufacturer and packaging format while maintaining these core electrical parameters. Package width variations (0.154" vs 0.209") represent different SOIC body styles but remain electrically interchangeable within the same footprint family.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Quiescent Current (Max)	Output Current	Propagation Delay	Operating Temp	Product Status	Package
74ACTQ08SJX	onsemi	4.5V ~ 5.5V	2 µA	24mA, 24mA	6.5ns @ 5V, 50pF	-40°C ~ 85°C	Obsolete	14-SOIC (0.209")
CD74ACT08M	Harris Corporation	4.5V ~ 5.5V	4 µA	24mA, 24mA	12.9ns @ 5V, 50pF	-55°C ~ 125°C	Obsolete	14-SOIC (0.154")
CD74ACT08M96	Texas Instruments	4.5V ~ 5.5V	4 µA	24mA, 24mA	12.9ns @ 5V, 50pF	-55°C ~ 125°C	Active	14-SOIC (0.154")
SN74ACT08D	Texas Instruments	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Discontinued at DiGi Electronics	14-SOIC (0.154")
SN74ACT08DR	Texas Instruments	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Active	14-SOIC (0.154")
SN74ACT08IDREP	Texas Instruments	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Active	14-SOIC (0.154")
SN74ACT08NSR	Texas Instruments	4.5V ~ 5.5V	2 µA	24mA, 24mA	9ns @ 5V, 50pF	-40°C ~ 85°C	Active	14-SOIC (0.209")

Engineering Selection Recommendations

For new designs and production applications, SN74ACT08DR, SN74ACT08IDREP, and SN74ACT08NSR are preferred substitutes due to active product status and ROHS3 compliance. These Texas Instruments parts maintain the electrical specifications of the 74ACTQ08SJX while offering current manufacturing availability.

SN74ACT08NSR provides the closest mechanical compatibility with the original 74ACTQ08SJX, featuring the same 14-SOIC (0.209", 5.30mm Width) package body. This eliminates potential PCB layout considerations when replacing existing assemblies.

CD74ACT08M96 is suitable for applications requiring extended operating temperature range (-55°C to 125°C) and offers ROHS3 compliance with active product status. The narrower package body (0.154") requires verification of PCB footprint compatibility.

SN74ACT08D remains available but is discontinued at DiGi Electronics, limiting long-term supply reliability for production quantities.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 74ACTQ08SJX with any 74ACT08 variant?

A: Yes, all 74ACT08 variants listed maintain the core electrical specifications required for direct substitution: 4-channel 2-input AND gate configuration, 4.5V to 5.5V supply voltage, 24mA output current, and matching input logic thresholds. Package body width differences (0.154" vs 0.209") must be verified against PCB footprint requirements.

Q: What is the difference between the package styles listed?

A: The 14-SOIC (0.154", 3.90mm Width) and 14-SOIC (0.209", 5.30mm Width) designations refer to the body width of the surface mount package. Both are 14-pin SOIC configurations with identical pin spacing and electrical connectivity. PCB footprints must match the specific package width to ensure proper component placement.

Q: Why do some substitute parts have different propagation delays?

A: Propagation delay variations (6.5ns to 12.9ns) reflect manufacturing process differences between manufacturers while remaining within acceptable logic family specifications. The 74ACT logic family standard permits these variations. Applications with strict timing requirements should reference the specific datasheet for the selected part number.

Q: Are all listed substitutes RoHS compliant?

A: SN74ACT08DR, SN74ACT08IDREP, and SN74ACT08NSR are ROHS3 compliant. CD74ACT08M is RoHS non-compliant. SN74ACT08D is ROHS3 compliant. Compliance requirements should be verified against your application and regional regulations.

Q: What is the difference between cut tape, tube, and tape & reel packaging?

A: These designations describe the supply format for component delivery. Cut Tape (CT) & Digi-Reel provides individual component strips. Tube packaging supplies components in plastic tubes. Tape & Reel (TR) provides components on continuous carrier tape for automated assembly. All formats contain electrically identical components; selection depends on assembly process requirements and order quantities.

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