74VHCT08AM Equivalent & Substitute Parts

Part Overview

The 74VHCT08AM is a 4-channel AND gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74VHCT08AM operates within the 4.5V to 5.5V supply voltage range and is suitable for applications requiring standard TTL-compatible AND gate functionality with 2 inputs per channel.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	8mA, 8mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	7.9ns @ 5V, 50pF
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

Substitute parts for the 74VHCT08AM are classified based on functional and electrical equivalence. All substitute parts maintain the core specifications: 4-channel AND gate configuration, 2 inputs per channel, 4.5V to 5.5V supply voltage operation, 8mA output current capability, and identical logic threshold levels. The critical parameters determining substitutability are logic type, circuit count, input count, supply voltage range, output current ratings, and propagation delay characteristics.

Substitutes are grouped into three categories:

Direct Manufacturer Substitutes maintain identical electrical performance and 14-SOIC packaging. These parts are pin-compatible and functionally equivalent with no design modifications required.

Upgrade Substitutes offer enhanced operating temperature ranges or automotive-grade qualifications (AEC-Q100) while maintaining electrical equivalence. These parts support extended temperature operation or automotive applications.

Similar Parts share the same logic function and electrical characteristics but may have different package dimensions (14-SO vs 14-SOIC width specifications). Physical board layout verification is required before substitution.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Circuits	Inputs	Supply Voltage	Output Current	Propagation Delay	Operating Temp	Package	Product Status
74VHCT08AM	onsemi	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 85°C	14-SOIC	Obsolete
SN74AHCT08D	Texas Instruments	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC	Discontinued at DiGi Electronics
SN74AHCT08DR	Texas Instruments	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC	Active
74AHCT08D,118	NXP Semiconductors	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	Not specified	Not specified	Active
74AHCT08D-Q100J	Nexperia USA Inc.	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SO	Active
74VHCT08D,118	NXP USA Inc.	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SO	Active
74VHCT08D-Q100J	Nexperia USA Inc.	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SO	Active
SN74AHCT08MDREP	Texas Instruments	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-55°C ~ 125°C	14-SOIC	Active
SN74AHCT08QDRG4Q1	Texas Instruments	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC	Active
SN74AHCT08QDRQ1	Texas Instruments	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC	Active
SN74AHCT08NSR	Texas Instruments	AND Gate	4	2	4.5V ~ 5.5V	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC (0.209", 5.30mm)	Active

Engineering Selection Recommendations

For direct replacement of the obsolete 74VHCT08AM, select from active-status parts with matching 14-SOIC packaging and identical operating temperature specifications. SN74AHCT08DR (Texas Instruments) and SN74AHCT08QDRQ1 (Texas Instruments) are recommended as primary substitutes, both maintaining -40°C to 125°C operating range and active product status with full availability.

For applications requiring extended temperature operation below -40°C, SN74AHCT08MDREP extends the lower temperature limit to -55°C while maintaining all electrical parameters.

For automotive applications requiring AEC-Q100 qualification, select 74AHCT08D-Q100J (Nexperia USA Inc.), SN74AHCT08QDRG4Q1 (Texas Instruments), or 74VHCT08D-Q100J (Nexperia USA Inc.). These parts carry automotive-grade certification and active product status.

Parts designated as 74AHCT08D,118 and 74VHCT08D,118 are available in bulk packaging with active status but lack specified operating temperature ranges. Verify temperature requirements before selection.

SN74AHCT08NSR differs in package width (0.209" vs 0.154") and requires board layout verification before substitution.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and identical electrical performance within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74VHCT08AM with SN74AHCT08DR without design modifications?

A: Yes. SN74AHCT08DR is pin-compatible with identical 14-SOIC packaging, matching electrical specifications, and active product status. No circuit modifications are required.

Q: What is the difference between 74AHCT and 74VHCT series substitutes?

A: Both series maintain identical electrical performance for this AND gate function. The series designation reflects internal design differences, but functional equivalence is maintained across all specified parameters including supply voltage, output current, propagation delay, and logic thresholds.

Q: Are automotive-qualified versions available?

A: Yes. 74AHCT08D-Q100J, SN74AHCT08QDRG4Q1, and 74VHCT08D-Q100J carry AEC-Q100 automotive qualification. These parts are suitable for automotive applications requiring formal qualification documentation.

Q: What is the difference between SN74AHCT08NSR and other substitutes?

A: SN74AHCT08NSR has a different package width (0.209" vs 0.154"). While electrically equivalent, physical board layout must be verified before substitution to ensure footprint compatibility.

Q: Which substitute offers the widest operating temperature range?

A: SN74AHCT08MDREP operates from -55°C to 125°C, providing the lowest temperature limit. Standard substitutes operate from -40°C to 125°C.

Q: Are all substitutes ROHS3 compliant?

A: All listed substitutes with specified RoHS status are ROHS3 compliant. Parts without specified RoHS status (74AHCT08D,118 and 74VHCT08D,118) should be verified with the manufacturer before procurement.

Q: What packaging options are available?

A: Primary substitutes are available in 14-SOIC surface mount packaging. Tape & Reel (TR) and Cut Tape (CT) packaging options are available for specific part numbers. Bulk packaging is available for 74AHCT08D,118 and 74VHCT08D,118.

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