SN74HC08DRE4 Equivalent & Substitute Parts

Part Overview

The SN74HC08DRE4 is a 4-channel AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement. The SN74HC08DRE4 operates across a 2V to 6V supply voltage range and is suitable for general-purpose logic applications requiring AND gate functionality with standard CMOS performance characteristics.

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	17ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74HC08DRE4 is determined by strict equivalence across the following critical parameters:

Logic Type: AND Gate with 4 circuits and 2 inputs per circuit
Supply Voltage Range: 2V ~ 6V minimum requirement
Output Current Capability: 5.2mA minimum for both high and low states
Input Logic Levels: 0.5V ~ 1.8V (low) and 1.5V ~ 4.2V (high)
Propagation Delay: Maximum 17ns at 6V with 50pF load
Operating Temperature: Minimum -40°C ~ 85°C
Package: 14-SOIC surface mount form factor
Compliance: ROHS3 and MSL Level 1

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Equivalents maintain identical electrical specifications and packaging, differing only in product status or packaging format (tape & reel vs. cut tape).

Parametric Equivalents meet or exceed all critical electrical parameters while maintaining package compatibility, with variations in quiescent current, propagation delay, or operating temperature range.

Manufacturer-Recommended Alternatives provide functional equivalence with the same logic configuration and package footprint, sourced from alternative manufacturers with active product status.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Packaging	Package Type
SN74HC08DRE4	Texas Instruments	Obsolete	2V ~ 6V	2 µA	17ns	-40°C ~ 85°C	14-SOIC	Surface Mount
SN74HC08DR	Texas Instruments	Active	2V ~ 6V	2 µA	17ns	-40°C ~ 85°C	14-SOIC	Surface Mount
SN74HC08DRG4	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	2 µA	17ns	-40°C ~ 85°C	14-SOIC	Surface Mount
SN74HC08DT	Texas Instruments	Discontinued at DiGi Electronics	2V ~ 6V	2 µA	17ns	-40°C ~ 85°C	14-SOIC	Surface Mount
MC74HC08ADR2G	onsemi	Active	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	14-SOIC	Surface Mount
MM74HC08MX	Fairchild Semiconductor	Active	2V ~ 6V	2 µA	20ns	-40°C ~ 85°C	14-SOIC	Surface Mount
74HC08D,653	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	14-SO	Surface Mount
74HC08D-Q100,118	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	14-SO	Surface Mount
74HC08S14-13	Diodes Incorporated	Active	2V ~ 6V	20 µA	15ns	-40°C ~ 125°C	14-SO	Surface Mount
MC74HC08ADG	onsemi	Active	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	14-SOIC	Surface Mount
MM74HC08M	Fairchild Semiconductor	Active	2V ~ 6V	2 µA	20ns	-40°C ~ 85°C	14-SOIC	Surface Mount

Engineering Selection Recommendations

Primary Recommendation: SN74HC08DR

The SN74HC08DR from Texas Instruments is the direct active equivalent to the SN74HC08DRE4. It maintains identical electrical specifications and 14-SOIC packaging, with the primary difference being product status (active vs. obsolete). This part is available in cut tape and Digi-Reel packaging formats and carries ROHS3 compliance with MSL Level 1 rating. Selection of this part eliminates any design risk associated with parameter variation.

Secondary Recommendation: MC74HC08ADR2G or MC74HC08ADG

The onsemi MC74HC08ADR2G and MC74HC08ADG offer superior performance characteristics with lower quiescent current (1 µA vs. 2 µA) and faster propagation delay (13ns vs. 17ns). Both parts maintain the 2V to 6V supply voltage range and 14-SOIC package footprint. These parts extend the operating temperature range to -55°C ~ 125°C, providing enhanced thermal margin. Both are active products with ROHS3 compliance and MSL Level 1 rating.

Alternative Recommendation: 74HC08D,653 or 74HC08D-Q100,118

The Nexperia parts 74HC08D,653 and 74HC08D-Q100,118 provide functional equivalence with improved propagation delay (15ns) and extended operating temperature range (-40°C ~ 125°C). The 74HC08D-Q100,118 variant includes AEC-Q100 automotive qualification. Both parts use 14-SO packaging, which is mechanically compatible with 14-SOIC footprints. These parts are active with ROHS3 compliance and MSL Level 1 rating.

Not Recommended: 74HC08S14-13

The Diodes Incorporated 74HC08S14-13 exhibits elevated quiescent current (20 µA) compared to the original specification (2 µA), representing a 10-fold increase in standby power consumption. While this part meets the core logic requirements and is active, the higher quiescent current may impact power budget calculations in battery-powered or low-power applications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74HC08DRE4 with SN74HC08DR?

A: Yes. The SN74HC08DR is the direct active equivalent with identical electrical specifications and 14-SOIC packaging. The only difference is product status (active vs. obsolete) and packaging format options (cut tape/Digi-Reel vs. the original format).

Q: What is the difference between 14-SOIC and 14-SO packaging?

A: Both 14-SOIC and 14-SO refer to 14-pin small-outline integrated circuit packages with 0.154" (3.90mm) width. These packages are mechanically and electrically compatible for PCB assembly purposes. The designations may vary by manufacturer but represent the same physical form factor.

Q: Are the onsemi MC74HC08ADR2G and MC74HC08ADG interchangeable?

A: Yes, these parts are functionally equivalent. The MC74HC08ADR2G is supplied in cut tape and Digi-Reel packaging, while the MC74HC08ADG is supplied in tube packaging. Both maintain identical electrical specifications and 14-SOIC package footprint. Selection depends on packaging and quantity requirements for your procurement process.

Q: Why does the 74HC08S14-13 have higher quiescent current?

A: The 74HC08S14-13 from Diodes Incorporated specifies a maximum quiescent current of 20 µA compared to 2 µA for the original part. This represents a design variation within the 74HC08 logic family. For applications sensitive to standby power consumption, this part should be avoided in favor of alternatives with lower quiescent current specifications.

Q: Can I use parts with extended temperature ranges in place of the original?

A: Yes. Parts with extended operating temperature ranges (such as -55°C ~ 125°C or -40°C ~ 125°C) are suitable replacements for the original -40°C ~ 85°C specification. Extended temperature capability provides additional thermal margin and does not introduce compatibility issues. This is particularly beneficial for industrial or automotive applications.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed in this reference maintain ROHS3 compliance and MSL Level 1 (unlimited moisture sensitivity) rating, matching the original SN74HC08DRE4 specifications. This ensures consistency with environmental and regulatory requirements across all recommended alternatives.

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