74AC11SC AND Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC11SC is a 3-channel AND gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This component implements three independent 3-input AND gates in a single package, operating across a 2V to 6V supply voltage range with 8ns maximum propagation delay at 5V with 50pF load. The 74AC11SC is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	3
Number of Inputs	3
Voltage - Supply	2V ~ 6V
Current - Output High, Low	24mA, 24mA
Max Propagation Delay @ V, Max CL	8ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the 74AC11SC is determined by strict equivalence across the following parameters: logic type (AND gate), circuit count (3 channels), input count (3 inputs per gate), supply voltage range (2V ~ 6V), output current capability (24mA high and low), propagation delay (8ns @ 5V, 50pF), operating temperature range (-40°C ~ 85°C), and package type (14-SOIC surface mount). All identified substitutes maintain these electrical and mechanical specifications. Packaging format (tube, tape & reel, cut tape) and product status (active vs. obsolete) are secondary considerations that do not affect functional equivalence but influence availability and procurement strategy.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Max Propagation Delay @ V, Max CL	Operating Temperature	Package / Case	Packaging
74AC11SC	onsemi	Obsolete	2V ~ 6V	2 µA	24mA, 24mA	8ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm Width)	-
MC74AC11DR2G	onsemi	Active	2V ~ 6V	4 µA	24mA, 24mA	8ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm Width)	Tape & Reel (TR)
MC74AC11DG	onsemi	Active	2V ~ 6V	4 µA	24mA, 24mA	8ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm Width)	Tube
SN74AC11D	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	2 µA	24mA, 24mA	8ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm Width)	Tube
SN74AC11DR	Texas Instruments	Active	2V ~ 6V	2 µA	24mA, 24mA	8ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm Width)	Cut Tape (CT) & Digi-Reel®
SN74AC11IDRG4Q1	Texas Instruments	Active	2V ~ 6V	2 µA	24mA, 24mA	8ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm Width)	Tape & Reel (TR)

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete 74AC11SC, the onsemi MC74AC11DR2G and MC74AC11DG are functionally equivalent active parts with identical electrical specifications and 14-SOIC packaging. Both are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1) rating.

Texas Instruments SN74AC11DR and SN74AC11IDRG4Q1 provide alternative sourcing from a different manufacturer while maintaining full electrical and mechanical compatibility. The SN74AC11DR is available in cut tape and digi-reel packaging for standard applications. The SN74AC11IDRG4Q1 includes automotive-grade qualification (AEC-Q100) and is suitable for automotive and high-reliability applications.

The SN74AC11D (Texas Instruments) is listed as discontinued at DiGi Electronics and should not be selected for new designs despite its active status at other distributors.

All substitute parts maintain the same propagation delay, output drive capability, and operating temperature range as the original 74AC11SC. Quiescent current differences (2 µA vs. 4 µA) are within acceptable tolerance for most applications and do not affect functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can MC74AC11DR2G replace 74AC11SC directly? A: Yes. MC74AC11DR2G is a direct functional equivalent with identical electrical specifications, 14-SOIC package, and operating range. The primary difference is product status (active vs. obsolete) and packaging format (tape & reel vs. unspecified).

Q: What is the difference between MC74AC11DR2G and MC74AC11DG? A: Both are onsemi 74AC11 variants with identical electrical performance. The difference is packaging format: MC74AC11DR2G is supplied in tape & reel (TR), while MC74AC11DG is supplied in tube. Selection depends on procurement quantity and assembly process requirements.

Q: Is SN74AC11IDRG4Q1 suitable for automotive applications? A: Yes. SN74AC11IDRG4Q1 carries AEC-Q100 automotive qualification and is rated for automotive-grade reliability. It maintains the same electrical specifications as standard 74AC11 variants.

Q: Does quiescent current difference affect substitution? A: No. The 2 µA vs. 4 µA quiescent current difference between onsemi and Texas Instruments variants is within acceptable tolerance and does not affect functional compatibility or circuit operation.

Q: What packaging options are available? A: Substitute parts are available in three packaging formats: tape & reel (MC74AC11DR2G, SN74AC11IDRG4Q1), tube (MC74AC11DG, SN74AC11D), and cut tape with digi-reel (SN74AC11DR). Selection depends on assembly volume and procurement workflow.

Q: Are all substitutes RoHS compliant? A: Yes. All active substitute parts (MC74AC11DR2G, MC74AC11DG, SN74AC11DR, SN74AC11IDRG4Q1) are ROHS3 compliant. The original 74AC11SC does not specify RoHS status.

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