CD74AC08M AND Gate IC Equivalent & Substitute Parts

Part Overview

The CD74AC08M is a 4-channel 2-input AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is discontinued at DiGi Electronics, making substitute parts necessary for ongoing production and maintenance applications. The CD74AC08M operates across a supply voltage range of 1.5V to 5.5V with a maximum propagation delay of 8.7ns at 5V with 50pF load, suitable for general-purpose digital logic applications requiring AND gate functionality.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	1.5V ~ 5.5V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	8.7ns
Operating Temperature	-55°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CD74AC08M are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Functional Parameters:

Logic Type: AND Gate (4 channels, 2 inputs per channel)
Package / Case: 14-SOIC surface mount form factor
Supply Voltage Range: Minimum 1.5V operation capability
Output Drive Capability: 24mA minimum for both high and low states
Propagation Delay: Maximum 8.7ns at 5V, 50pF load

Compliance & Regulatory Parameters:

RoHS3 Compliance
ECCN: EAR99
HTSUS: 8542.39.0001

Substitute parts must maintain identical pinout, package dimensions, and logic function. Variations in supply voltage range, quiescent current, input logic levels, and operating temperature are acceptable provided the substitute operates within the application's required conditions.

Parameter Comparison

Parameter	CD74AC08M (Main)	CD74AC08M96	74AC08SCX	MC74AC08DG	MC74AC08DR2G
Manufacturer	Texas Instruments	Texas Instruments	Fairchild Semiconductor	onsemi	onsemi
Logic Type	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate
Number of Circuits	4	4	4	4	4
Number of Inputs	2	2	2	2	2
Voltage - Supply	1.5V ~ 5.5V	1.5V ~ 5.5V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	4 µA	4 µA	2 µA	4 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	8.7ns	8.7ns	7.5ns	7.5ns	7.5ns
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

CD74AC08M96 (Texas Instruments): Direct substitute with identical electrical specifications and extended temperature range (-55°C to 125°C). Active product status with ROHS3 compliance. Recommended for applications requiring the original temperature operating range. Available in Cut Tape and Digi-Reel packaging with 31,294 units in stock.

74AC08SCX (Fairchild Semiconductor): Functionally compatible substitute with improved propagation delay (7.5ns vs 8.7ns) and lower quiescent current (2µA vs 4µA). Supply voltage range extends to 6V maximum. Operating temperature range limited to -40°C to 85°C. Suitable for applications not requiring extended low-temperature operation. Highest inventory availability at 300,100 units.

MC74AC08DG (onsemi): Active substitute with identical quiescent current and output drive specifications. Supply voltage range 2V to 6V with improved propagation delay (7.5ns). Operating temperature -40°C to 85°C. ROHS3 compliant with MSL Level 1. Available in Tube packaging with 3,991 units in stock.

MC74AC08DR2G (onsemi): Functionally equivalent to MC74AC08DG with identical electrical characteristics. Available in Tape & Reel packaging format. ROHS3 compliant with MSL Level 1. Suitable for high-volume automated assembly processes. 1,130 units in stock.

Selection criteria: Choose CD74AC08M96 for direct replacement requiring original temperature specifications. Select 74AC08SCX, MC74AC08DG, or MC74AC08DR2G for applications operating within -40°C to 85°C range where improved performance and active product status are priorities.

Frequently Asked Questions (FAQ)

Q: Can I use 74AC08SCX as a direct replacement for CD74AC08M in all applications?

A: The 74AC08SCX is functionally compatible for applications operating within -40°C to 85°C. If your application requires operation below -40°C or above 85°C, use CD74AC08M96 instead, which maintains the original -55°C to 125°C operating range.

Q: What is the difference between MC74AC08DG and MC74AC08DR2G?

A: Both parts are electrically identical. The primary difference is packaging: MC74AC08DG is supplied in Tube format for manual handling, while MC74AC08DR2G is supplied in Tape & Reel format optimized for automated pick-and-place assembly.

Q: Are all substitute parts RoHS3 compliant?

A: CD74AC08M96, MC74AC08DG, and MC74AC08DR2G are confirmed ROHS3 compliant. RoHS status for 74AC08SCX is not specified in available documentation.

Q: Do the substitute parts have the same pinout as CD74AC08M?

A: Yes. All substitute parts maintain identical 14-SOIC pinout and package dimensions (0.154", 3.90mm width), enabling direct PCB replacement without layout modifications.

Q: Which substitute offers the best performance?

A: The 74AC08SCX, MC74AC08DG, and MC74AC08DR2G all offer improved propagation delay (7.5ns vs 8.7ns). The 74AC08SCX additionally provides lower quiescent current (2µA vs 4µA). Performance differences are marginal for most general-purpose logic applications.

Q: What is the minimum supply voltage for each substitute?

A: CD74AC08M96 operates from 1.5V minimum. The 74AC08SCX, MC74AC08DG, and MC74AC08DR2G require minimum 2V supply. Verify your application's minimum supply voltage before selection.

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