TLC3702IDRG4 Equivalent & Substitute Parts

Part Overview

The TLC3702IDRG4 is a dual general-purpose CMOS comparator manufactured by Texas Instruments, designed for applications requiring low-power voltage comparison with push-pull TTL-compatible outputs. The device operates across a 3V to 16V supply range and is housed in an 8-SOIC surface-mount package.

The TLC3702IDRG4 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for systems utilizing this comparator.

Substiute Parts

TLC3702IDRG4

Texas InstrumentsIn Stock: 2050TLC3702IDRG4 Datasheet

Current PartRFQ

TLC3702IDR

Texas InstrumentsIn Stock: 37260TLC3702IDR Datasheet

MFR RecommendedRFQ

NCS3402DR2G

onsemiIn Stock: 9169NCS3402DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TLC3702IDRG4 is determined by the following critical parameters:

• Package Compatibility: 8-SOIC surface-mount package with 0.154" width (3.90mm)
• Functional Equivalence: Dual general-purpose comparator architecture
• Output Configuration: CMOS/TTL-compatible output stage
• Supply Voltage Range: Minimum 3V operation capability
• Electrical Performance: Input offset voltage, bias current, and propagation delay characteristics
• Compliance: ROHS3 compliance and surface-mount suitability

The identified substitute parts maintain the same package footprint and dual-comparator functionality. However, variations in output type, supply voltage floor, and performance characteristics must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

TLC3702IDR (Texas Instruments, Active Status)

The TLC3702IDR is the direct Texas Instruments equivalent to the obsolete TLC3702IDRG4. It maintains identical electrical specifications, output configuration (CMOS/Push-Pull/TTL), and supply voltage range (3V ~ 16V). The primary difference is product status transition from obsolete to active, ensuring long-term availability and supply chain continuity. This part is recommended as the primary replacement for direct substitution in existing designs. Both parts are ROHS3 compliant and carry identical performance characteristics.

NCS3402DR2G (onsemi, Active Status)

The NCS3402DR2G is a cross-manufacturer alternative offering comparable dual-comparator functionality in the same 8-SOIC package. Key distinctions include open-drain output configuration (versus push-pull), lower supply voltage floor (2.5V versus 3V), extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), and significantly lower quiescent current (640nA versus 65µA). The open-drain output requires external pull-up resistors and is not directly pin-compatible with TTL-level outputs. This part is suitable for applications where lower power consumption and extended temperature operation are prioritized, provided the output configuration change is accommodated in circuit design.

Frequently Asked Questions (FAQ)

Q: Can TLC3702IDR be used as a direct replacement for TLC3702IDRG4?

A: Yes. The TLC3702IDR is electrically and mechanically identical to the TLC3702IDRG4. Both devices feature the same 8-SOIC package, dual-comparator architecture, CMOS/Push-Pull/TTL output stage, and 3V to 16V supply range. The primary difference is product status; TLC3702IDR is active and available, while TLC3702IDRG4 is obsolete. No circuit modifications are required.

Q: What is the key difference between TLC3702IDR and NCS3402DR2G?

A: The primary difference is output type. TLC3702IDR features CMOS/Push-Pull/TTL outputs suitable for direct TTL-level interfacing. NCS3402DR2G uses open-drain outputs, which require external pull-up resistors to establish logic levels. Additionally, NCS3402DR2G offers lower quiescent current (640nA versus 65µA) and extended temperature operation (-40°C to 125°C). Propagation delay differs significantly: TLC3702IDR at 4.5µs maximum versus NCS3402DR2G at 220µs typical.

Q: Is the NCS3402DR2G suitable for applications requiring TTL-level outputs?

A: The NCS3402DR2G open-drain output can be configured for TTL-level operation through appropriate external pull-up resistor selection and supply voltage management. However, this requires circuit redesign and is not a direct pin-compatible substitution. Applications with strict TTL output requirements should use TLC3702IDR.

Q: Are all three parts ROHS3 compliant?

A: Yes. TLC3702IDRG4, TLC3702IDR, and NCS3402DR2G are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What packaging options are available for these comparators?

A: All three parts are supplied in 8-SOIC surface-mount packages with 0.154" width (3.90mm). TLC3702IDR is available in Cut Tape and Digi-Reel packaging. NCS3402DR2G is supplied in Tape & Reel format. Package footprints are identical across all three parts.

Q: Which part should be selected for new designs?

A: For new designs, TLC3702IDR is recommended as the primary choice, offering active product status, proven Texas Instruments support, and direct compatibility with existing TLC3702 design documentation. NCS3402DR2G may be considered if lower power consumption or extended temperature operation are critical requirements, provided the open-drain output configuration is accommodated in the circuit design.