74HC08DTR2G AND Gate IC Equivalent & Substitute Parts

Part Overview

The 74HC08DTR2G is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-TSSOP surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74HC08 series represents a standard logic gate function across multiple manufacturers, with several active alternatives available that maintain functional compatibility within specified electrical parameters.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V to 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	5.2mA / 5.2mA
Input Logic Level - Low	0.5V to 1.8V
Input Logic Level - High	1.5V to 4.2V
Max Propagation Delay @ 6V, 50pF	13ns
Operating Temperature	-55°C to 125°C
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74HC08DTR2G is determined by the following critical parameters:

Logic Function: All substitutes must implement 4-channel 2-input AND gate logic
Package Type: Primary substitutes use 14-TSSOP packaging; 14-SSOP variants are mechanically compatible with PCB layout adjustments
Voltage Supply Range: All substitutes operate within 2V to 6V range
Output Drive Capability: Current output specifications (5.2mA) must be maintained
Propagation Delay: Maximum delay at 6V, 50pF load determines timing compatibility
Operating Temperature Range: Extended range (-55°C to 125°C) preferred for industrial applications; commercial range (-40°C to 85°C) acceptable for standard applications
Compliance & Status: Active parts with RoHS3 compliance preferred over discontinued or obsolete alternatives

Substitutes are grouped into three categories: parametric equivalents (identical electrical performance), similar parts (minor parameter variations), and functional alternatives (same logic function with acceptable performance trade-offs).

Parameter Comparison

Part Number	Manufacturer	Status	Package	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temp	RoHS Status
74HC08DTR2G	onsemi	Obsolete	14-TSSOP	2V - 6V	2 µA	13ns	-55°C to 125°C	REACH Unaffected
MC74HC08ADTR2G	onsemi	Active	14-TSSOP	2V - 6V	1 µA	13ns	-55°C to 125°C	ROHS3 Compliant
MC74HC08ADTR2G-Q	onsemi	Active	14-TSSOP	2V - 6V	1 µA	13ns	-55°C to 125°C	ROHS3 Compliant
MM74HC08MTCX	onsemi	Active	14-TSSOP	2V - 6V	2 µA	20ns	-40°C to 85°C	ROHS3 Compliant
CD74HC08PW	Texas Instruments	Discontinued	14-TSSOP	2V - 6V	2 µA	15ns	-55°C to 125°C	ROHS3 Compliant
CD74HC08PWR	Texas Instruments	Active	14-TSSOP	2V - 6V	2 µA	15ns	-55°C to 125°C	ROHS3 Compliant
SN74HC08DBR	Texas Instruments	Active	14-SSOP	2V - 6V	2 µA	17ns	-40°C to 85°C	ROHS3 Compliant
SN74HC08IPWRG4Q1	Texas Instruments	Active	14-TSSOP	2V - 6V	2 µA	17ns	-40°C to 85°C	ROHS3 Compliant
SN74HC08IPWRQ1	Texas Instruments	Active	14-TSSOP	2V - 6V	2 µA	17ns	-40°C to 85°C	ROHS3 Compliant
SN74HC08PW	Texas Instruments	Discontinued	14-TSSOP	2V - 6V	2 µA	17ns	-40°C to 85°C	ROHS3 Compliant
SN74HC08PWR	Texas Instruments	Active	14-TSSOP	2.1V - 6V	2 µA	17ns	-40°C to 85°C	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Parametric Equivalents (Direct Replacement)

MC74HC08ADTR2G and MC74HC08ADTR2G-Q are parametric equivalents with identical propagation delay (13ns) and extended operating temperature range (-55°C to 125°C). Both are active products with RoHS3 compliance. MC74HC08ADTR2G offers superior quiescent current performance (1 µA vs. 2 µA). These parts are recommended for applications requiring extended temperature operation and timing-critical circuits.

Tier 2 - Functional Equivalents (Same Logic, Minor Parameter Variance)

CD74HC08PWR (Texas Instruments) and MM74HC08MTCX (onsemi) maintain full functional compatibility with acceptable propagation delay variance (15ns and 20ns respectively). CD74HC08PWR is active with RoHS3 compliance and extended temperature range. MM74HC08MTCX is active but operates within commercial temperature range (-40°C to 85°C). These parts are suitable for non-timing-critical applications.

Tier 3 - Commercial Temperature Alternatives

SN74HC08PWR, SN74HC08IPWRQ1, and SN74HC08IPWRG4Q1 (Texas Instruments) are active products with commercial operating temperature range (-40°C to 85°C) and propagation delay of 17ns. SN74HC08IPWRQ1 and SN74HC08IPWRG4Q1 carry AEC-Q100 automotive qualification. These parts are appropriate for commercial and automotive applications where extended temperature operation is not required.

Mechanical Variant

SN74HC08DBR uses 14-SSOP packaging (0.209", 5.30mm width) instead of 14-TSSOP. This variant requires PCB layout modification and is suitable only when 14-TSSOP footprint is unavailable.

Avoid

CD74HC08PW and SN74HC08PW are discontinued at DiGi Electronics and should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can I use MC74HC08ADTR2G as a direct replacement for 74HC08DTR2G?

A: Yes. MC74HC08ADTR2G is a parametric equivalent with identical propagation delay (13ns @ 6V, 50pF) and extended operating temperature range (-55°C to 125°C). It is an active product with RoHS3 compliance and lower quiescent current (1 µA). Electrical and mechanical compatibility is confirmed.

Q: What is the difference between 14-TSSOP and 14-SSOP packaging?

A: 14-TSSOP has a width of 0.173" (4.40mm); 14-SSOP has a width of 0.209" (5.30mm). Pin pitch and lead geometry differ. PCB footprints are not interchangeable without layout modification. SN74HC08DBR uses 14-SSOP and requires footprint adjustment.

Q: Can I use SN74HC08PWR in place of 74HC08DTR2G?

A: SN74HC08PWR is functionally compatible but has three key differences: (1) commercial operating temperature range (-40°C to 85°C) vs. extended range (-55°C to 125°C), (2) propagation delay of 17ns vs. 13ns, and (3) minimum supply voltage of 2.1V vs. 2V. It is suitable for commercial applications not requiring extended temperature or tight timing specifications.

Q: Why do some substitutes have lower quiescent current?

A: MC74HC08ADTR2G specifies 1 µA maximum quiescent current compared to 2 µA for the original part. This represents improved power efficiency in the same logic family and does not affect functional compatibility. Lower quiescent current is beneficial for battery-powered applications.

Q: Are automotive-qualified parts (AEC-Q100) required?

A: AEC-Q100 qualification is required only for automotive applications. SN74HC08IPWRQ1 and SN74HC08IPWRG4Q1 carry this qualification. For industrial and commercial applications, non-qualified parts are acceptable.

Q: What is the impact of propagation delay differences?

A: Propagation delay determines maximum circuit operating frequency. The original part specifies 13ns; substitutes range from 13ns to 20ns. Parts with 13ns or 15ns delay are suitable for timing-critical circuits. Parts with 17ns or 20ns delay are acceptable for general logic applications operating below 50 MHz.

Q: Can I mix different manufacturers in the same design?

A: Yes. All listed substitutes implement identical logic function and maintain compatible electrical specifications within the 74HC08 series. Cross-manufacturer substitution is standard practice in logic IC design.

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