TLC3702CDRG4 Equivalent & Substitute Parts

Part Overview

The TLC3702CDRG4 is a dual general-purpose CMOS comparator manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The comparator operates across a 3V to 16V supply range with push-pull TTL output configuration, suitable for precision signal comparison applications requiring low input offset voltage and moderate propagation delay.

Substiute Parts

TLC3702CDRG4

Texas InstrumentsIn Stock: 1601TLC3702CDRG4 Datasheet

Current PartRFQ

TLC3702CDR

Texas InstrumentsIn Stock: 18164TLC3702CDR Datasheet

MFR RecommendedRFQ

NCS3402DR2G

onsemiIn Stock: 9169NCS3402DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TLC3702CDRG4 is determined by the following critical parameters:

Primary Substitution Criteria:

• Dual comparator configuration (2 elements)
• 8-SOIC surface-mount package with identical 0.154" width (3.90mm)
• Supply voltage range compatibility (minimum 3V operation required)
• Output type compatibility (CMOS/TTL push-pull or equivalent)
• Input offset voltage performance (5mV or better)
• Operating temperature range (minimum 0°C to 70°C coverage)

Substitute Parts Identified:

1. TLC3702CDR (Texas Instruments) – Direct manufacturer equivalent with identical electrical specifications and active product status
2. NCS3402DR2G (onsemi) – Cross-manufacturer substitute with compatible package, enhanced performance in select parameters, and extended operating temperature range

Both substitutes maintain the 8-SOIC package footprint, dual-element configuration, and core functional performance required for direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

TLC3702CDR is the primary substitute for the TLC3702CDRG4. Both devices are manufactured by Texas Instruments with identical electrical specifications, supply voltage range, and operating temperature limits. The TLC3702CDR maintains active product status, ensuring long-term availability and supply chain continuity. This part is recommended for direct replacement in existing designs without circuit modification.

NCS3402DR2G is a secondary substitute suitable for applications where extended operating temperature range (-40°C to 125°C) and lower quiescent current (640nA) provide design advantages. This onsemi device features open-drain output configuration rather than push-pull, requiring external pull-up resistors for TTL-compatible output levels. The NCS3402DR2G exhibits superior CMRR and PSRR performance (88dB CMRR, 105dB PSRR) and lower input offset voltage (3.6mV @ 15V). However, the significantly longer propagation delay (220µs typical versus 4.5µs maximum for the TLC3702) may impact timing-critical applications. Circuit redesign and output stage modification are necessary for this substitute.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical 8-SOIC package footprint, ensuring mechanical and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can TLC3702CDR be used as a direct drop-in replacement for TLC3702CDRG4?

A: Yes. The TLC3702CDR is electrically and mechanically identical to the TLC3702CDRG4, with the same supply voltage range (3V ~ 16V), output type (CMOS push-pull TTL), and operating temperature range (0°C ~ 70°C). No circuit modifications are required. The primary difference is product status: TLC3702CDR is active, while TLC3702CDRG4 is obsolete.

Q: What is the key difference between TLC3702CDR and NCS3402DR2G?

A: The primary differences are output type and propagation delay. TLC3702CDR features push-pull TTL output with 4.5µs maximum propagation delay, while NCS3402DR2G uses open-drain output with 220µs typical propagation delay. NCS3402DR2G also offers extended operating temperature range (-40°C to 125°C) and lower quiescent current (640nA). Output stage modification is required when substituting with NCS3402DR2G.

Q: Is the 8-SOIC package footprint identical across all three parts?

A: Yes. All three parts use the 8-SOIC package with 0.154" width (3.90mm), ensuring identical PCB footprint and mechanical compatibility. Surface-mount assembly equipment settings remain unchanged.

Q: Does NCS3402DR2G require circuit modifications?

A: Yes. The open-drain output configuration of NCS3402DR2G differs from the push-pull output of TLC3702CDRG4 and TLC3702CDR. External pull-up resistors must be added to achieve TTL-compatible output levels. Additionally, the significantly longer propagation delay (220µs typical) may require timing analysis in delay-sensitive applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TLC3702CDR, NCS3402DR2G, and the original TLC3702CDRG4 are all ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, meeting environmental and regulatory requirements for industrial and commercial applications.

Q: What is the supply voltage compatibility range for substitution?

A: TLC3702CDRG4 and TLC3702CDR both operate from 3V to 16V. NCS3402DR2G extends the lower limit to 2.5V, providing additional flexibility for low-voltage applications. All three parts support the full 3V to 16V range required by the original design.