CD74HC08MT AND Gate IC Equivalent & Substitute Parts

Part Overview

The CD74HC08MT 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 but remains available through inventory channels. The CD74HC08MT operates across a 2V to 6V supply voltage range and is suitable for general-purpose digital logic applications requiring AND gate functionality. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	5.2mA, 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	15ns
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Base Product Number	74HC08
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD74HC08MT is determined by strict equivalence across the following critical parameters:

Logic Type: AND Gate with 4 circuits and 2 inputs per circuit
Voltage Supply Range: 2V ~ 6V
Output Current Capability: 5.2mA high and low
Input Logic Levels: Low 0.5V ~ 1.8V, High 1.5V ~ 4.2V
Package Type: 14-SOIC surface mount
Base Product Number: 74HC08 series
RoHS3 Compliance and MSL Level 1

Substitute parts are grouped by manufacturer and packaging format. All listed substitutes maintain identical logic functionality and electrical specifications within the allowed parameter ranges. Variations in quiescent current (1 µA to 20 µA) and propagation delay (13ns to 20ns) remain within acceptable operating margins for standard logic applications. Operating temperature ranges vary between -40°C to -55°C minimum and 85°C to 125°C maximum; selection depends on application requirements.

Parameter Comparison

Part Number	Manufacturer	Packaging	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Product Status
CD74HC08MT	Texas Instruments	Tape & Reel (TR)	2 µA	15ns	-55°C ~ 125°C	Discontinued
CD74HC08M96	Texas Instruments	Cut Tape (CT) & Digi-Reel®	2 µA	15ns	-55°C ~ 125°C	Active
MC74HC08ADR2G	onsemi	Cut Tape (CT) & Digi-Reel®	1 µA	13ns	-55°C ~ 125°C	Active
74HC08D,653	Nexperia USA Inc.	Cut Tape (CT) & Digi-Reel®	2 µA	15ns	-40°C ~ 125°C	Active
74HC08D-Q100,118	Nexperia USA Inc.	Tape & Reel (TR)	2 µA	15ns	-40°C ~ 125°C	Active
74HC08S14-13	Diodes Incorporated	Tape & Reel (TR)	20 µA	15ns	-40°C ~ 125°C	Active
MC74HC08ADG	onsemi	Tube	1 µA	13ns	-55°C ~ 125°C	Active
MM74HC08M	Fairchild Semiconductor	Not Specified	2 µA	20ns	-40°C ~ 85°C	Active
MM74HC08MX	Fairchild Semiconductor	Not Specified	2 µA	20ns	-40°C ~ 85°C	Active

Engineering Selection Recommendations

For applications requiring direct replacement of the discontinued CD74HC08MT, the following selection criteria apply:

Primary Recommendation: CD74HC08M96 (Texas Instruments) provides identical electrical specifications and operating temperature range (-55°C ~ 125°C) with active product status. This part maintains the same quiescent current and propagation delay characteristics as the original.

Extended Temperature Range Applications: MC74HC08ADR2G and MC74HC08ADG (onsemi) offer superior performance with lower quiescent current (1 µA) and faster propagation delay (13ns) while maintaining the full -55°C ~ 125°C operating range.

Automotive Grade Option: 74HC08D-Q100,118 (Nexperia USA Inc.) is qualified to AEC-Q100 automotive standards and suitable for automotive and industrial applications requiring enhanced reliability certification.

Packaging Considerations: Select based on procurement and assembly requirements. Cut Tape & Digi-Reel® packaging (CD74HC08M96, MC74HC08ADR2G, 74HC08D,653) is standard for high-volume production. Tape & Reel packaging (74HC08D-Q100,118, 74HC08S14-13) accommodates automated pick-and-place equipment. Tube packaging (MC74HC08ADG) is suitable for lower-volume applications.

Temperature-Limited Applications: MM74HC08M and MM74HC08MX (Fairchild Semiconductor) are restricted to -40°C ~ 85°C operating range and should be selected only when application temperature requirements do not exceed these limits.

Frequently Asked Questions (FAQ)

Q: Can CD74HC08M96 directly replace CD74HC08MT in existing designs? A: Yes. CD74HC08M96 maintains identical electrical specifications, logic functionality, and operating temperature range. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Pin configuration and electrical performance are equivalent.

Q: What is the difference between the onsemi MC74HC08ADR2G and MC74HC08ADG? A: Both parts are manufactured by onsemi with identical electrical specifications. MC74HC08ADR2G is supplied in Cut Tape & Digi-Reel® packaging, while MC74HC08ADG is supplied in Tube packaging. Electrical performance and operating temperature range (-55°C ~ 125°C) are identical.

Q: Why does 74HC08S14-13 have higher quiescent current (20 µA) compared to other substitutes? A: The 74HC08S14-13 (Diodes Incorporated) maintains full logic functionality and propagation delay specifications within the 74HC08 series standard. The elevated quiescent current remains acceptable for standard logic applications and does not affect switching performance or output drive capability.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, consistent with the original CD74HC08MT specifications.

Q: Which substitute part offers the best performance characteristics? A: MC74HC08ADR2G and MC74HC08ADG (onsemi) provide the lowest quiescent current (1 µA) and fastest propagation delay (13ns @ 6V, 50pF) while maintaining the full -55°C ~ 125°C operating temperature range. These parts are suitable for power-sensitive and timing-critical applications.

Q: Can Fairchild MM74HC08M or MM74HC08MX be used in applications requiring -55°C operation? A: No. Fairchild parts are rated only to -40°C minimum operating temperature. Applications requiring -55°C operation must use Texas Instruments CD74HC08M96, onsemi MC74HC08ADR2G/MC74HC08ADG, or Nexperia 74HC08D series parts.

Q: What packaging format should be selected for automated assembly? A: Cut Tape & Digi-Reel® and Tape & Reel formats are optimized for automated pick-and-place equipment. Tube packaging is suitable for manual or semi-automated assembly. Select based on production volume and assembly equipment capabilities.

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