74LVQ32SC OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74LVQ32SC is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74LVQ32SC operates across a 2V to 3.6V supply voltage range with low quiescent current consumption of 2 µA maximum, suitable for low-power digital logic applications requiring OR gate functionality.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	2V ~ 3.6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	12mA, 12mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	9ns @ 3.3V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVQ32SC is determined by the following critical parameters:

Logic function: 4-channel 2-input OR gate
Package compatibility: 14-SOIC surface mount form factor
Supply voltage range: Minimum 2V to 3.6V operation
Output drive capability: 12mA minimum for both high and low states
Quiescent current: 2 µA maximum
Propagation delay: 9ns maximum at 3.3V with 50pF load
Operating temperature range: -40°C to 85°C minimum

Substitute parts are grouped into two categories based on electrical compatibility:

Category A - Direct Substitutes (Identical Electrical Specifications): Parts meeting all electrical parameters of the 74LVQ32SC within the specified tolerances.

Category B - Compatible Substitutes (Extended Specifications): Parts with enhanced or extended electrical specifications that maintain backward compatibility with the 74LVQ32SC operating parameters while offering additional performance headroom or wider operating ranges.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Input Logic Level - Low	Input Logic Level - High	Max Propagation Delay @ V, Max CL	Operating Temperature	Package / Case	Product Status
74LVQ32SC	onsemi	74LVQ	2V ~ 3.6V	2 µA	12mA, 12mA	0.8V	2V	9ns @ 3.3V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Obsolete
MC74LVX32DR2G	onsemi	74LVX	2V ~ 3.6V	2 µA	4mA, 4mA	0.5V ~ 0.8V	1.5V ~ 2.4V	10.1ns @ 3.3V, 50pF	-40°C ~ 85°C	14-SOIC (0.154", 3.90mm)	Active
74LV32AS14-13	Diodes Incorporated	74LV	2V ~ 5.5V	20 µA	12mA, 12mA	0.5V	1.5V	7.5ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active
SN74LV32AD	Texas Instruments	74LV	2V ~ 5.5V	20 µA	12mA, 12mA	0.5V	1.5V	7.5ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Discontinued at DiGi Electronics
SN74LV32ADR	Texas Instruments	74LV	2V ~ 5.5V	20 µA	12mA, 12mA	0.5V	1.5V	7.5ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active
SN74LV32ANSR	Texas Instruments	74LV	2V ~ 5.5V	20 µA	12mA, 12mA	0.5V	1.5V	7.5ns @ 5V, 50pF	-40°C ~ 125°C	14-SOIC (0.209", 5.30mm)	Active
SN74LVC32AD	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	24mA, 24mA	0.7V ~ 0.8V	1.7V ~ 2V	3.6ns @ 3.3V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active
SN74LVC32ADR	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	24mA, 24mA	0.7V ~ 0.8V	1.7V ~ 2V	3.6ns @ 3.3V, 50pF	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Active

Engineering Selection Recommendations

Primary Recommendation - SN74LVC32ADR (Texas Instruments): This part offers active product status with RoHS3 compliance and superior electrical performance. The 74LVC series provides lower quiescent current (1 µA vs 2 µA), faster propagation delay (3.6ns vs 9ns), and higher output drive capability (24mA vs 12mA). The supply voltage range of 1.65V to 3.6V encompasses the 74LVQ32SC operating window. Cut Tape & Digi-Reel packaging ensures availability for production volumes.

Secondary Recommendation - SN74LV32ADR (Texas Instruments): This part maintains active product status with RoHS3 compliance and identical output drive specifications (12mA) to the 74LVQ32SC. Extended supply voltage range (2V to 5.5V) and wider operating temperature (-40°C to 125°C) provide design flexibility. Faster propagation delay (7.5ns at 5V) offers performance improvement.

Alternative - 74LV32AS14-13 (Diodes Incorporated): Active product status with RoHS3 compliance. Identical output drive capability (12mA) and matching logic thresholds. Extended operating temperature range (-40°C to 125°C) and wider supply voltage support (2V to 5.5V). Tape & Reel packaging suitable for high-volume production.

Not Recommended - MC74LVX32DR2G (onsemi): While maintaining the same manufacturer as the obsolete 74LVQ32SC, this part exhibits reduced output drive capability (4mA vs 12mA), which may not satisfy all application requirements. Quiescent current matches the original specification.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC32ADR as a direct replacement for 74LVQ32SC? A: Yes. The SN74LVC32ADR operates within the 74LVQ32SC supply voltage range (1.65V to 3.6V encompasses 2V to 3.6V) and maintains the same 14-SOIC package footprint. The 74LVC series provides superior performance with lower quiescent current, faster propagation delay, and higher output drive capability, making it a compatible upgrade.

Q: What is the difference between 74LV and 74LVC series? A: The 74LVC series operates at lower supply voltages (1.65V minimum vs 2V minimum for 74LV) with reduced quiescent current (1 µA vs 20 µA) and faster propagation delays. Both series maintain the same logic function and package compatibility with the 74LVQ32SC.

Q: Why does MC74LVX32DR2G have lower output current than the original? A: The 74LVX series is optimized for ultra-low power consumption with 4mA output drive capability. Applications requiring the full 12mA output current of the 74LVQ32SC should select 74LV or 74LVC alternatives.

Q: Are there package differences between substitute parts? A: Most substitutes use 14-SOIC (0.154", 3.90mm width) matching the 74LVQ32SC. The SN74LV32ANSR uses a wider 14-SOIC variant (0.209", 5.30mm width). Verify PCB footprint compatibility before selection.

Q: What compliance certifications apply to these substitutes? A: All active substitute parts carry RoHS3 compliance. All parts are REACH Unaffected and classified as EAR99 for export control purposes. Moisture Sensitivity Level is 1 (Unlimited) across all alternatives.

Q: Which substitute offers the best performance improvement? A: The SN74LVC32ADR provides the most significant performance enhancement with 3.6ns propagation delay (compared to 9ns for the original), 24mA output drive capability, and 1 µA quiescent current. This part is recommended for new designs requiring improved speed and power efficiency.

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