TLC354IDRG4 Equivalent & Substitute Parts

Part Overview

The TLC354IDRG4 is a 4-channel differential comparator IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This LinCMOS™ series component features CMOS, MOS, open-drain, and TTL output configurations with a supply voltage range of 1.4V to 16V (single) or ±0.7V to ±8V (dual). The device is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

TLC354IDRG4

Texas InstrumentsIn Stock: 937TLC354IDRG4 Datasheet

Current PartRFQ

TS339CDT

STMicroelectronicsIn Stock: 5517TS339CDT Datasheet

MFR RecommendedRFQ

TS339IDT

STMicroelectronicsIn Stock: 15817TS339IDT Datasheet

MFR RecommendedRFQ

TS374CDT

STMicroelectronicsIn Stock: 10018TS374CDT Datasheet

MFR RecommendedRFQ

TS374IDT

STMicroelectronicsIn Stock: 7898TS374IDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TLC354IDRG4 is determined by the following critical parameters:

Functional Equivalence Criteria:

• 4-channel comparator configuration
• Differential comparator type
• CMOS, MOS, open-drain, and TTL output capability
• 14-SOIC package form factor (0.154", 3.90mm width)
• Surface mount technology

Electrical Compatibility Criteria:

• Supply voltage range must encompass or overlap with 1.4V ~ 16V (single) or ±0.7V ~ 8V (dual)
• Input offset voltage maximum of 5mV @ 5V or better
• Input bias current maximum of 5pA @ 5V or better
• Output current capability of 20mA typical
• Operating temperature range must support -40°C ~ 85°C minimum

The substitute parts listed below meet these criteria with active product status and full RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

TS374IDT is the primary substitute for the TLC354IDRG4. This part maintains differential comparator functionality with identical output type configuration (CMOS, MOS, open-drain, TTL). The TS374IDT supports the full operating temperature range of -40°C to 125°C, exceeding the original specification. Supply voltage range of 3V to 16V (single) or ±1.5V to ±8V (dual) covers the majority of typical applications. Quiescent current of 250µA is significantly lower than the original 800µA specification. Active product status and ROHS3 compliance ensure long-term availability and regulatory compliance.

TS374CDT provides an alternative with identical electrical and functional characteristics to TS374IDT but with restricted operating temperature range (0°C to 70°C). This variant is suitable for applications not requiring extended low-temperature operation.

TS339IDT and TS339CDT are general-purpose comparator alternatives with reduced output type configuration (CMOS, open-drain only, excluding MOS and TTL outputs). These parts feature superior input bias current (1pA versus 5pA) and lower quiescent current (25µA). TS339IDT supports the full -40°C to 125°C temperature range, while TS339CDT is limited to 0°C to 70°C. Selection of TS339 variants requires confirmation that application circuits do not depend on MOS or TTL output modes.

All substitute parts are ROHS3 compliant and maintain the 14-SOIC package form factor for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can TS339CDT or TS339IDT directly replace TLC354IDRG4 in all applications?

A: TS339 variants are general-purpose comparators with CMOS and open-drain outputs only. The original TLC354IDRG4 supports MOS and TTL output modes. Direct substitution is valid only if the application circuit does not utilize MOS or TTL output configurations. Verify output mode requirements in the original design before selection.

Q: What is the impact of the minimum supply voltage difference between TLC354IDRG4 (1.4V) and substitute parts?

A: TS374 variants support minimum 3V single supply, while TS339 variants support minimum 2.7V. Applications operating below 2.7V single supply cannot use any listed substitutes. For dual supply operation, TS374 minimum is ±1.5V and TS339 minimum is ±1.35V, compared to the original ±0.7V. Verify supply voltage specifications in the original design.

Q: Are there temperature range considerations for substitute selection?

A: The original TLC354IDRG4 operates -40°C to 85°C. TS374IDT and TS339IDT extend this to -40°C to 125°C, providing enhanced low and high temperature capability. TS374CDT and TS339CDT are limited to 0°C to 70°C and are unsuitable for applications requiring extended temperature operation below 0°C or above 70°C.

Q: How do quiescent current differences affect power consumption?

A: The original TLC354IDRG4 specifies 800µA maximum quiescent current. TS374 variants reduce this to 250µA, and TS339 variants to 25µA. Lower quiescent current reduces standby power consumption. Applications with strict power budgets benefit from TS339 selection, while TS374 provides a moderate reduction with maintained differential comparator functionality.

Q: Is the 14-SOIC package identical across all parts?

A: All listed parts use 14-SOIC packaging with 0.154" (3.90mm) width. Physical footprint and PCB layout compatibility are maintained across all substitutes. No PCB redesign is required for package accommodation.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts are ROHS3 compliant and REACH unaffected, matching the original TLC354IDRG4 compliance status. No regulatory or environmental compliance issues arise from substitution.