74VCX08M AND Gate IC Equivalent & Substitute Parts

Part Overview

The 74VCX08M is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part operates across a 1.2V to 3.6V supply voltage range with low quiescent current and is designed for general-purpose logic applications. The 74VCX08M is currently listed as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain functional equivalence in logic operation, electrical performance, and physical packaging to ensure direct board-level compatibility.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	1.2V ~ 3.6V
Current - Quiescent (Max)	20 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.7V ~ 0.8V
Input Logic Level - High	1.6V ~ 2V
Max Propagation Delay @ V, Max CL	2.8ns @ 3.3V, 30pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 74VCX08M are selected based on strict electrical and mechanical compatibility criteria. All substitutes must meet the following requirements:

Core Substitution Criteria:

Logic type: 4-channel 2-input AND gate
Package type: 14-SOIC surface mount
Supply voltage range: Must encompass or be compatible with 1.2V ~ 3.6V operation
Output current capability: Minimum 24mA for both high and low states
Operating temperature range: -40°C ~ 85°C
Input logic levels: Compatible with 0.7V ~ 0.8V (low) and 1.6V ~ 2V (high) thresholds

Substitutes are grouped into two categories: direct equivalents (identical electrical specifications) and compatible alternatives (meeting all functional and mechanical requirements with minor electrical parameter variations within acceptable operating margins).

Parameter Comparison

Parameter	74VCX08M (onsemi)	74VCX08MX (Fairchild)	SN74ALVC08D (TI)	SN74ALVC08DR (TI)	SN74ALVC08IDREP (TI)	SN74ALVC08NSR (TI)
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	1.2V ~ 3.6V	1.2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Current - Quiescent (Max)	20 µA	20 µA	10 µA	10 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	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V
Input Logic Level - High	1.6V ~ 2V	1.6V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V
Max Propagation Delay @ V, Max CL	2.8ns @ 3.3V, 30pF	2.8ns @ 3.3V, 30pF	2.9ns @ 3.3V, 50pF	2.9ns @ 3.3V, 50pF	2.9ns @ 3.3V, 50pF	2.9ns @ 3.3V, 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.209", 5.30mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: 74VCX08MX (Fairchild Semiconductor)

The 74VCX08MX provides direct electrical equivalence to the 74VCX08M with identical supply voltage range (1.2V ~ 3.6V), quiescent current (20 µA), output current (24mA), and propagation delay specifications. This part maintains active product status and ROHS3 compliance, making it the preferred direct replacement for new designs and production continuity.

Secondary Substitutes: SN74ALVC08D, SN74ALVC08DR, SN74ALVC08IDREP (Texas Instruments)

The Texas Instruments 74ALVC08 series parts are functionally compatible alternatives with the following considerations:

Supply voltage range is narrower (1.65V ~ 3.6V) compared to the 74VCX08M (1.2V ~ 3.6V). These parts are suitable for applications operating at 1.65V or higher.
Quiescent current is lower (10 µA vs. 20 µA), providing improved power efficiency.
Propagation delay is marginally higher (2.9ns vs. 2.8ns), which is negligible for most general-purpose logic applications.
All variants maintain ROHS3 compliance and active product status.
Packaging options include Tube (SN74ALVC08D), Cut Tape & Digi-Reel (SN74ALVC08DR), and Tape & Reel (SN74ALVC08IDREP) for different supply chain requirements.

Package Consideration: SN74ALVC08NSR

The SN74ALVC08NSR is electrically equivalent to other 74ALVC08 variants but uses a wider 14-SO package (0.209", 5.30mm width) compared to the standard 14-SOIC (0.154", 3.90mm width). This part is suitable only for applications where the wider package footprint is accommodated in the PCB layout.

Frequently Asked Questions (FAQ)

Q: Can the 74VCX08MX directly replace the 74VCX08M without circuit modifications?

A: Yes. The 74VCX08MX is electrically and mechanically identical to the 74VCX08M, with the same supply voltage range, output current, and propagation delay. No circuit modifications are required for direct substitution.

Q: Are the Texas Instruments 74ALVC08 series parts compatible with the 74VCX08M?

A: The 74ALVC08 series parts are functionally compatible for most applications. However, the minimum supply voltage is 1.65V instead of 1.2V. If your circuit operates below 1.65V, the 74ALVC08 series is not suitable. For applications at 1.65V or higher, the 74ALVC08 series provides equivalent logic functionality with lower quiescent current.

Q: What is the difference between the various Texas Instruments 74ALVC08 packaging options?

A: SN74ALVC08D is supplied in Tube packaging, SN74ALVC08DR is supplied in Cut Tape & Digi-Reel format, and SN74ALVC08IDREP is supplied in Tape & Reel format. All three variants are electrically identical; the difference is in supply chain packaging for manufacturing and assembly processes.

Q: Why does the SN74ALVC08NSR have a different package width?

A: The SN74ALVC08NSR uses a 14-SO package with 0.209" width instead of the standard 14-SOIC with 0.154" width. This wider package may not fit existing PCB footprints designed for the standard 14-SOIC. Verify PCB layout compatibility before selecting this variant.

Q: Is the slightly higher propagation delay of the 74ALVC08 series (2.9ns vs. 2.8ns) significant?

A: The 0.1ns difference is negligible for general-purpose logic applications. This delay variation is within typical manufacturing tolerances and does not affect functional performance in standard digital circuits. High-speed timing-critical applications should verify timing margins independently.

Q: Are all substitute parts RoHS compliant?

A: The 74VCX08MX and all Texas Instruments 74ALVC08 variants are ROHS3 compliant. The original 74VCX08M RoHS status is not specified in the provided data. All active substitute parts meet current environmental compliance requirements.

Q: Which substitute should I select for new designs?

A: For new designs, select the 74VCX08MX (Fairchild Semiconductor) if your circuit operates below 1.65V. For circuits operating at 1.65V or higher, the Texas Instruments 74ALVC08 series offers equivalent functionality with improved power efficiency. Verify supply chain availability and lead times for your production schedule.

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