SN74AHCT1G00DBVT NAND Gate IC Equivalent & Substitute Parts

Part Overview

The SN74AHCT1G00DBVT is a single-channel 2-input NAND gate logic IC manufactured by Texas Instruments in SOT-23-5 surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates within a 4.5V to 5.5V supply voltage range and is suitable for general-purpose logic applications requiring low propagation delay and minimal quiescent current.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	1
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	1 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, 15pF
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74AHCT1G00DBVT is determined by the following critical parameters: logic type (NAND gate), circuit count (1 channel), input count (2 inputs), supply voltage range (4.5V ~ 5.5V), output current capability (8mA minimum), propagation delay performance, operating temperature range (-40°C ~ 125°C), and surface mount packaging compatibility.

Substitute parts are grouped into the following categories:

Parametric Equivalent: Parts with identical electrical specifications and compatible packaging. SN74AHCT1G00DBVR meets all electrical parameters and differs only in packaging format (Cut Tape vs. Tape & Reel).

Direct Manufacturer Equivalent: Parts from alternative manufacturers with compatible logic function and similar electrical performance within acceptable tolerances. MC74VHC1G00DTT1G operates across a wider supply voltage range (2V ~ 5.5V) and offers enhanced propagation delay performance (7.5ns @ 5V, 50pF).

Upgrade Options: Parts with identical or superior electrical specifications and active product status. 74AHCT1G00GV,125 (NXP), 74AHCT1G00W5-7 (Diodes Incorporated), 74AHCT1G00GV-Q100H (Nexperia, automotive-qualified), and 74AHCT1G00GW,125 (Nexperia) maintain the 74AHCT series specifications with active availability.

Alternative Series: Parts from different logic families with compatible function but different electrical characteristics. 74HCT1G00GV,125 operates at reduced output current (2mA) and increased quiescent current (20 µA). NC7ST00M5X and NC7ST00P5X operate at reduced output current (2mA) with extended propagation delay (26ns). NC7SZ00M5X offers wider supply voltage range (1.65V ~ 5.5V) and superior propagation delay (4.3ns @ 5V) with increased output current (32mA).

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Max Propagation Delay @ V, Max CL	Operating Temperature	Package / Case	Product Status
SN74AHCT1G00DBVT	Texas Instruments	74AHCT	4.5V ~ 5.5V	1 µA	8mA, 8mA	7.9ns @ 5V, 15pF	-40°C ~ 125°C	SC-74A, SOT-753	Discontinued
SN74AHCT1G00DBVR	Texas Instruments	74AHCT	4.5V ~ 5.5V	1 µA	8mA, 8mA	7.9ns @ 5V, 15pF	-40°C ~ 125°C	SC-74A, SOT-753	Active
MC74VHC1G00DTT1G	onsemi	74VHC	2V ~ 5.5V	1 µA	8mA, 8mA	7.5ns @ 5V, 50pF	-55°C ~ 125°C	SOT-23-5 Thin, TSOT-23-5	Obsolete
74AHCT1G00GV,125	NXP USA Inc.	74AHCT	4.5V ~ 5.5V	1 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	SC-74A, SOT-753	Active
74AHCT1G00W5-7	Diodes Incorporated	74AHCT	4.5V ~ 5.5V	1 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	SC-74A, SOT-753	Active
74AHCT1G00GV-Q100H	Nexperia USA Inc.	74AHCT	4.5V ~ 5.5V	1 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	SC-74A, SOT-753	Active
74AHCT1G00GW,125	Nexperia USA Inc.	74AHCT	4.5V ~ 5.5V	1 µA	8mA, 8mA	7.9ns @ 5V, 50pF	-40°C ~ 125°C	5-TSSOP, SC-70-5, SOT-353	Active
74HCT1G00GV,125	Nexperia USA Inc.	74HCT	4.5V ~ 5.5V	20 µA	2mA, 2mA	12ns @ 4.5V, 50pF	-40°C ~ 125°C	SC-74A, SOT-753	Active
NC7ST00M5X	Fairchild Semiconductor	7ST	4.5V ~ 5.5V	1 µA	2mA, 2mA	26ns @ 5.5V, 50pF	-40°C ~ 85°C	SC-74A, SOT-753	Active
NC7ST00P5X	onsemi	7ST	4.5V ~ 5.5V	1 µA	2mA, 2mA	26ns @ 5.5V, 50pF	-40°C ~ 85°C	5-TSSOP, SC-70-5, SOT-353	Active
NC7SZ00M5X	onsemi	7SZ	1.65V ~ 5.5V	2 µA	32mA, 32mA	4.3ns @ 5V, 50pF	-40°C ~ 85°C	SC-74A, SOT-753	Active

Engineering Selection Recommendations

First Choice for Direct Replacement: SN74AHCT1G00DBVR (Texas Instruments) is the primary parametric equivalent with identical electrical specifications and active product status. This part maintains full compatibility with the discontinued SN74AHCT1G00DBVT across all critical parameters.

Active 74AHCT Series Alternatives: 74AHCT1G00GV,125 (NXP), 74AHCT1G00W5-7 (Diodes Incorporated), 74AHCT1G00GV-Q100H (Nexperia), and 74AHCT1G00GW,125 (Nexperia) provide equivalent electrical performance with active availability. The Nexperia 74AHCT1G00GV-Q100H includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

Package Variant Consideration: 74AHCT1G00GW,125 (Nexperia) offers identical electrical specifications in 5-TSSOP packaging as an alternative to SOT-23-5 if board layout requires a different footprint.

Lower Output Current Alternative: 74HCT1G00GV,125 (Nexperia) operates within the same supply voltage and temperature range but with reduced output current (2mA vs. 8mA) and increased quiescent current (20 µA vs. 1 µA). This part is suitable only for applications with reduced output current requirements.

Extended Supply Voltage Range: NC7SZ00M5X (onsemi) operates across 1.65V to 5.5V supply voltage with superior propagation delay (4.3ns) and increased output current (32mA). This part is suitable for applications requiring lower supply voltages or enhanced performance, though operating temperature is limited to -40°C to 85°C.

Reduced Performance Alternatives: NC7ST00M5X (Fairchild) and NC7ST00P5X (onsemi) provide NAND gate function with reduced output current (2mA) and extended propagation delay (26ns). These parts are suitable only for non-critical timing applications and operate within -40°C to 85°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT1G00DBVR directly replace SN74AHCT1G00DBVT?

A: Yes. SN74AHCT1G00DBVR is a parametric equivalent with identical electrical specifications, operating temperature range, and supply voltage requirements. The only difference is packaging format (Cut Tape vs. Tape & Reel). Both parts are RoHS3 compliant with MSL 1 rating.

Q: What is the key difference between 74AHCT and 74HCT series?

A: The 74AHCT series (advanced high-speed CMOS) provides 8mA output current and 1 µA quiescent current. The 74HCT series (high-speed CMOS) provides reduced output current (2mA) and increased quiescent current (20 µA). The 74AHCT series is preferred for applications requiring higher output drive capability.

Q: Can NC7SZ00M5X replace SN74AHCT1G00DBVT in all applications?

A: NC7SZ00M5X is functionally compatible but with important differences: it operates across a wider supply voltage range (1.65V ~ 5.5V), provides superior propagation delay (4.3ns vs. 7.9ns), and offers higher output current (32mA vs. 8mA). However, its operating temperature range is limited to -40°C to 85°C compared to -40°C to 125°C for the original part. Use this part only if your application does not require operation above 85°C.

Q: What are the packaging differences among substitute parts?

A: SN74AHCT1G00DBVT, SN74AHCT1G00DBVR, 74AHCT1G00GV,125, 74AHCT1G00W5-7, 74AHCT1G00GV-Q100H, NC7ST00M5X, and NC7SZ00M5X use SOT-23-5 or SC-74A packaging. 74AHCT1G00GW,125 and NC7ST00P5X use 5-TSSOP or SC-70-5 packaging. Verify PCB footprint compatibility before selection.

Q: Is MC74VHC1G00DTT1G a suitable replacement?

A: MC74VHC1G00DTT1G is functionally compatible with identical output current (8mA) and quiescent current (1 µA). It offers wider supply voltage range (2V ~ 5.5V) and superior propagation delay (7.5ns @ 5V, 50pF). However, this part is marked as obsolete, making it unsuitable for new designs or long-term production continuity.

Q: Which substitute part is recommended for automotive applications?

A: 74AHCT1G00GV-Q100H (Nexperia) is qualified to AEC-Q100 automotive standard and maintains full electrical equivalence to the original part. This part is suitable for automotive-grade applications requiring component qualification.

Q: Can I use NC7ST00M5X or NC7ST00P5X as direct replacements?

A: These parts provide NAND gate function with identical supply voltage range but reduced output current (2mA vs. 8mA) and extended propagation delay (26ns vs. 7.9ns). Use these parts only in applications where reduced output drive and slower switching speed are acceptable. Operating temperature is also limited to -40°C to 85°C.

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