TLC393IDRDL Equivalent & Substitute Parts

Part Overview

The TLC393IDRDL is a general-purpose comparator featuring open-drain, rail-to-rail output configuration in an 8-SOIC surface-mount package. This device is designed for applications requiring precision voltage comparison across a wide supply voltage range of 3V to 16V. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for ongoing production and maintenance requirements.

Substiute Parts

TLC393IDRDL

Texas InstrumentsIn Stock: 834TLC393IDRDL Datasheet

Current PartRFQ

TLC393QDRQ1

Texas InstrumentsIn Stock: 1719TLC393QDRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC393IDRDL is determined by strict equivalence across the following critical parameters:

Package Compatibility: Both the main part and substitute must utilize the 8-SOIC surface-mount package with identical physical dimensions (0.154", 3.90mm Width) to ensure PCB layout compatibility without redesign.

Functional Architecture: The substitute must contain two comparator elements with open-drain output configuration and rail-to-rail capability to maintain circuit functionality.

Electrical Specifications: Supply voltage range, input offset voltage, input bias current, output current capability, and propagation delay must remain within the specified tolerances to ensure direct functional replacement without circuit modification.

Environmental and Compliance Standards: RoHS3 compliance and MSL rating of 1 are mandatory for manufacturing and supply chain continuity.

The TLC393QDRQ1 meets all substitution criteria as an active product from the same manufacturer with identical package, element count, and core electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TLC393QDRQ1

The TLC393QDRQ1 is the direct active equivalent for the obsolete TLC393IDRDL. Both devices share identical package geometry, element count, and core electrical specifications. The substitute is manufactured by Texas Instruments and maintains ROHS3 compliance with unlimited moisture sensitivity rating.

Operational Considerations:

The TLC393QDRQ1 operates within a minimum supply voltage of 4V, compared to the main part's 3V minimum. Applications requiring operation below 4V supply voltage cannot use this substitute without circuit redesign.

The substitute exhibits higher quiescent current consumption at 90µA maximum versus 40µA for the main part. This difference must be evaluated in battery-powered or low-power applications where quiescent current is a design constraint.

The extended operating temperature range of the substitute (-40°C to 125°C versus -40°C to 85°C) provides additional thermal margin for high-temperature environments.

Compliance and Availability:

The TLC393QDRQ1 carries AEC-Q100 automotive qualification and is actively manufactured, ensuring long-term supply chain availability. This status contrasts with the obsolete classification of the TLC393IDRDL, making the substitute the appropriate choice for new designs and ongoing production.

Frequently Asked Questions (FAQ)

Q: Can the TLC393QDRQ1 directly replace the TLC393IDRDL without PCB modifications?

A: Yes, the TLC393QDRQ1 is pin-compatible and uses the identical 8-SOIC package. No PCB layout changes are required for physical substitution. However, circuit operation below 4V supply voltage is not supported by the substitute.

Q: What is the significance of the supply voltage range difference (3V ~ 16V versus 4V ~ 16V)?

A: The main part supports operation at 3V supply, while the substitute minimum is 4V. If your application operates at 3V, the TLC393QDRQ1 cannot be used. For applications operating at 4V or higher, this difference is not a constraint.

Q: How does the higher quiescent current of the substitute affect circuit design?

A: The TLC393QDRQ1 draws 90µA maximum quiescent current compared to 40µA for the main part, a difference of 50µA. In applications where total system quiescent current is tightly controlled, this increase must be factored into power budget calculations. For most general-purpose comparator applications, this difference is negligible.

Q: Is the TLC393QDRQ1 suitable for automotive applications?

A: Yes, the TLC393QDRQ1 carries AEC-Q100 qualification, making it suitable for automotive-grade applications. The main part does not specify automotive qualification.

Q: What does the extended temperature range of the substitute mean for my application?

A: The TLC393QDRQ1 operates to 125°C, while the main part is rated to 85°C. If your application requires operation above 85°C, the substitute provides additional thermal margin. For applications within the 85°C limit, both parts are equivalent.

Q: Are there any differences in output characteristics between the two parts?

A: Both parts provide 20mA typical output current and open-drain, rail-to-rail output configuration. Output characteristics are functionally equivalent for standard comparator applications.

Q: What packaging options are available for the TLC393QDRQ1?

A: The substitute is supplied in Tape & Reel (TR) packaging for automated assembly. The main part packaging format is not specified in the provided data.