TLC3702IDG4 Equivalent & Substitute Parts

Part Overview

The TLC3702IDG4 is a dual general-purpose CMOS comparator manufactured by Texas Instruments, packaged in 8-SOIC surface mount configuration. This device operates across a 3V to 16V supply range and features push-pull TTL-compatible outputs with typical output current of 20mA. The TLC3702IDG4 is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and long-term support.

Substiute Parts

TLC3702IDG4

Texas InstrumentsIn Stock: 1251TLC3702IDG4 Datasheet

Current PartRFQ

TLC3702IDR

Texas InstrumentsIn Stock: 37260TLC3702IDR Datasheet

MFR RecommendedRFQ

NCS3402DR2G

onsemiIn Stock: 9169NCS3402DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLC3702IDG4 are qualified based on the following criteria:

Electrical Compatibility:

• Dual comparator configuration (2 elements)
• 8-SOIC package footprint compatibility
• Supply voltage range encompassing 3V ~ 16V minimum
• Output stage capable of driving TTL-level loads
• Input offset voltage and bias current within acceptable design margins

Mechanical Compatibility:

• 8-SOIC surface mount package (0.154", 3.90mm width)
• Identical pinout and footprint

Compliance & Status:

• ROHS3 compliance maintained
• Active or Last Time Buy product status

The TLC3702IDR (Texas Instruments) qualifies as a direct substitute with identical electrical specifications and packaging format. The NCS3402DR2G (onsemi) qualifies as a functional substitute with compatible dual-comparator architecture and 8-SOIC packaging, though with differing output stage topology and extended temperature range.

Parameter Comparison

Engineering Selection Recommendations

TLC3702IDR (Texas Instruments): This part is the manufacturer-recommended substitute for the TLC3702IDG4. It maintains identical electrical specifications, supply voltage range, and output characteristics. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect functional performance. This part is in Active product status with significantly higher inventory availability (37,200 units). Selection of TLC3702IDR eliminates all electrical redesign requirements and maintains full design compatibility.

NCS3402DR2G (onsemi): This part provides functional substitution with compatible dual-comparator architecture and 8-SOIC packaging. Key differences include open-drain output topology (versus push-pull), lower typical output current (10mA versus 20mA), and significantly longer propagation delay (220µs typical versus 4.5µs maximum). The NCS3402DR2G offers extended operating temperature range (-40°C to 125°C) and lower quiescent current (640nA versus 65µA). Selection of this part requires circuit redesign to accommodate open-drain output characteristics and may impact timing-critical applications due to increased propagation delay. This part is in Active product status.

Frequently Asked Questions (FAQ)

Q: Can TLC3702IDR be used as a direct replacement for TLC3702IDG4?

A: Yes. The TLC3702IDR is electrically and functionally identical to the TLC3702IDG4. Both devices feature identical supply voltage range (3V ~ 16V), output type (CMOS, Push-Pull, TTL), propagation delay (4.5µs maximum), and operating temperature range (-40°C ~ 85°C). The only difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect circuit performance or PCB assembly compatibility.

Q: What are the key differences between TLC3702IDR and NCS3402DR2G?

A: The primary differences are output stage topology and propagation delay. TLC3702IDR features push-pull TTL-compatible outputs with 20mA typical output current and 4.5µs maximum propagation delay. NCS3402DR2G features open-drain outputs with 10mA typical output current and 220µs typical propagation delay. NCS3402DR2G offers lower quiescent current (640nA versus 65µA) and extended temperature range (-40°C to 125°C). Open-drain output requires external pull-up resistors and is not directly compatible with TTL-level loads without circuit modification.

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

A: Yes. All three parts (TLC3702IDG4, TLC3702IDR, and NCS3402DR2G) use the 8-SOIC package with 0.154" (3.90mm) width. PCB footprints and land patterns are mechanically compatible. However, pinout verification is required before substitution, particularly when considering the NCS3402DR2G due to output stage differences.

Q: Why is TLC3702IDG4 in Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory is being sold through distribution channels, but no new production runs are planned. Customers requiring this device should transition to the active substitute TLC3702IDR or evaluate the NCS3402DR2G for new designs.

Q: Are all three parts ROHS3 compliant?

A: Yes. TLC3702IDG4, TLC3702IDR, and NCS3402DR2G are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All parts meet REACH requirements and carry EAR99 ECCN classification.