SN74LVC08ADE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC08ADE4 is a 4-channel 2-input AND gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This part operates across a supply voltage range of 1.65V to 3.6V with low quiescent current and fast propagation delay characteristics suitable for general-purpose logic applications.

The SN74LVC08ADE4 is discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with compatible electrical and mechanical specifications, enabling direct replacement in existing designs.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	1.65V ~ 3.6V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	24mA, 24mA
Max Propagation Delay @ 3.3V, 50pF	3.9ns
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Logic function: AND gate with 4 channels and 2 inputs per channel
Package type: 14-SOIC surface mount form factor
Supply voltage compatibility: Minimum 1.65V operation required
Output drive capability: 24mA minimum for both high and low states
Propagation delay: Maximum 3.9ns at 3.3V, 50pF load
Operating temperature range: -40°C to 125°C minimum

Substitute parts are grouped by manufacturer and series while maintaining functional and electrical equivalence within these parameters.

Parameter Comparison

Parameter	SN74LVC08ADE4 (TI)	SN74LVC08AD (TI)	74LCX08M (Fairchild)	74LVC08AD,118 (Nexperia)	74LVC08AS14-13 (Diodes)	MC74LCX08DG (onsemi)
Manufacturer	Texas Instruments	Texas Instruments	Fairchild Semiconductor	Nexperia USA Inc.	Diodes Incorporated	onsemi
Logic Type	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate
Number of Circuits	4	4	4	4	4	4
Number of Inputs	2	2	2	2	2	2
Voltage - Supply	1.65V ~ 3.6V	1.65V ~ 3.6V	2V ~ 3.6V	1.2V ~ 3.6V	1.65V ~ 5.5V	2V ~ 3.6V
Current - Quiescent (Max)	1 µA	1 µA	10 µA	40 µA	10 µA	10 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.12V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V
Input Logic Level - High	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.08V ~ 2V	1.7V ~ 2V	1.7V ~ 2V
Max Propagation Delay @ 3.3V, 50pF	3.9ns	3.9ns	5.5ns	4.1ns	3.9ns	5.5ns
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SN74LVC08AD (Texas Instruments)

The SN74LVC08AD is the direct equivalent from the original manufacturer. It maintains identical electrical specifications including 1.65V to 3.6V supply voltage, 1 µA quiescent current, and 3.9ns propagation delay. The part is in active production status with 1900 units in stock. This selection eliminates any design risk associated with manufacturer substitution.

Secondary Recommendation: 74LVC08AS14-13 (Diodes Incorporated)

The 74LVC08AS14-13 provides full functional equivalence with identical propagation delay (3.9ns) and extended supply voltage range (1.65V to 5.5V). It is actively produced with 2158 units available. This part is suitable for applications requiring broader voltage tolerance.

Alternative Consideration: 74LVC08AD,118 (Nexperia USA Inc.)

The 74LVC08AD,118 offers the widest supply voltage range (1.2V to 3.6V) and highest inventory availability (20953 units). Propagation delay is 4.1ns, which remains within acceptable limits for most applications. Quiescent current is elevated at 40 µA compared to the original 1 µA specification.

Not Recommended: 74LCX08M and MC74LCX08DG (Fairchild/onsemi)

Both 74LCX series parts operate with minimum supply voltage of 2V, which exceeds the original 1.65V minimum. Operating temperature range is limited to -40°C to 85°C, reducing the upper temperature capability by 40°C. Propagation delay is 5.5ns, representing a 41% increase over the original specification. These parts are suitable only for applications with relaxed voltage and temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC08AD directly replace the SN74LVC08ADE4?

A: Yes. The SN74LVC08AD is electrically and functionally identical to the SN74LVC08ADE4. Both are 4-channel 2-input AND gates with identical supply voltage range (1.65V to 3.6V), quiescent current (1 µA), and propagation delay (3.9ns). The primary difference is product status: SN74LVC08ADE4 is discontinued while SN74LVC08AD is in active production.

Q: What is the minimum supply voltage requirement for substitutes?

A: The original SN74LVC08ADE4 requires a minimum supply voltage of 1.65V. Substitute parts must support this voltage level. The 74LCX08M and MC74LCX08DG have a 2V minimum and are not suitable for 1.65V applications. The 74LVC08AD,118 supports 1.2V minimum, providing additional margin.

Q: Are all substitute parts available in 14-SOIC packaging?

A: Yes. All listed substitute parts are available in 14-SOIC surface mount packaging with identical physical dimensions (0.154" width, 3.90mm). Packaging variants (Tube, Bulk, Tape & Reel) differ only in quantity and delivery format, not in component form factor.

Q: What is the impact of propagation delay differences?

A: The original part specifies 3.9ns maximum propagation delay at 3.3V with 50pF load. The 74LCX08M and MC74LCX08DG have 5.5ns delay (41% increase), while the 74LVC08AD,118 has 4.1ns (5% increase). For timing-critical applications, parts with 3.9ns or 4.1ns delay are preferred. The 74LCX series is acceptable for non-critical timing paths.

Q: Which substitute offers the best compliance status?

A: The SN74LVC08AD, 74LVC08AD,118, 74LVC08AS14-13, and MC74LCX08DG all carry ROHS3 compliance certification. All parts are classified as EAR99 for export control and REACH Unaffected for chemical regulations. Compliance status is equivalent across all active production substitutes.

Q: Can I use 74LVC08AS14-13 in a 1.65V to 3.6V application?

A: Yes. The 74LVC08AS14-13 supports supply voltage from 1.65V to 5.5V, which encompasses the original operating range. The extended upper voltage limit (5.5V vs 3.6V) provides additional design flexibility without compromising performance at the original voltage specification.

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