TLC372MFKB Equivalent & Substitute Parts

Part Overview

The TLC372MFKB is a low-power LinCMOS dual comparator manufactured by Texas Instruments, designed for applications requiring differential comparison with rail-to-rail open-drain output. This device operates across a wide supply voltage range of 4V to 16V (single supply) or ±2V to ±8V (dual supply), making it suitable for battery-powered and industrial control systems.

The TLC372MFKB is currently in Last Time Buy status, indicating that Texas Instruments has discontinued or is phasing out this particular package variant. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for new designs or production runs.

Substiute Parts

TLC372MFKB

Texas InstrumentsIn Stock: 802TLC372MFKB Datasheet

Current PartRFQ

TLC372MDR

Texas InstrumentsIn Stock: 16027TLC372MDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC372MFKB is determined by strict alignment of the following critical parameters:

Functional Equivalence Criteria:

• Dual differential comparator architecture (2 elements)
• Open-drain output configuration with rail-to-rail capability
• Identical supply voltage range: 4V ~ 16V (single) or ±2V ~ 8V (dual)
• Matching input offset voltage specification: 5mV @ 5V maximum
• Matching input bias current specification: 5pA @ 5V maximum
• Output current capability: 20mA typical
• Operating temperature range: -55°C ~ 125°C

Package and Compliance Considerations:

• Surface mount technology required
• ROHS3 compliance mandatory
• REACH unaffected status required

The TLC372MDR qualifies as a direct functional substitute based on identical electrical specifications across all critical parameters. The primary difference is the package format: TLC372MDR uses 8-SOIC (0.154", 3.90mm Width) instead of 20-CLCC, and carries Active product status rather than Last Time Buy.

Parameter Comparison

Engineering Selection Recommendations

TLC372MDR Selection Rationale:

The TLC372MDR is the primary substitute for the TLC372MFKB based on functional equivalence and product lifecycle status. Both devices maintain identical electrical specifications for all critical parameters: supply voltage range, input offset voltage, input bias current, output current, and operating temperature range. Both are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for industrial and commercial applications.

The TLC372MDR carries Active product status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the TLC372MFKB. The quiescent current specification of the TLC372MDR is 400µA maximum versus 300µA for the main part, representing a 100µA increase that may be relevant for ultra-low-power battery applications but remains within acceptable limits for most industrial control systems.

The primary design consideration is the package transition from 20-CLCC to 8-SOIC. This requires PCB layout modification and component footprint redesign. The 8-SOIC package offers reduced board space requirements and improved thermal characteristics for high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can TLC372MDR be used as a direct pin-for-pin replacement for TLC372MFKB?

A: No. While both devices are functionally equivalent dual comparators with identical electrical specifications, they use different package formats. TLC372MFKB uses 20-CLCC packaging while TLC372MDR uses 8-SOIC packaging. PCB layout and footprint redesign is required for substitution.

Q: What is the difference in quiescent current between these parts?

A: The TLC372MFKB specifies a maximum quiescent current of 300µA, while the TLC372MDR specifies 400µA maximum. This 100µA difference is negligible for most applications but should be evaluated for battery-powered systems with strict power budget constraints.

Q: Are both parts compliant with environmental and regulatory standards?

A: Yes. Both TLC372MFKB and TLC372MDR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for industrial electronics manufacturing.

Q: Why is TLC372MFKB in Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued or is phasing out this particular package variant. The TLC372MDR in 8-SOIC packaging represents the active product line continuation for this comparator family.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: dual differential comparator configuration, open-drain output type, supply voltage range (4V ~ 16V single or ±2V ~ 8V dual), input offset voltage (5mV @ 5V maximum), input bias current (5pA @ 5V maximum), output current (20mA typical), and operating temperature range (-55°C ~ 125°C).

Q: Can the TLC372MDR handle the same load conditions as the TLC372MFKB?

A: Yes. Both devices specify identical output current capability of 20mA typical, ensuring equivalent load-driving performance in comparator output applications.