TLC354CD Equivalent & Substitute Parts

Part Overview

The TLC354CD is a 4-channel differential comparator IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This LinCMOS™ series component operates across a wide supply voltage range (1.4V ~ 16V single supply, ±0.7V ~ 8V dual supply) and is designed for applications requiring multiple independent comparison channels with CMOS, MOS, open-drain, and TTL output compatibility. The part is currently in Last Time Buy status, making equivalent substitutes necessary for ongoing design support and procurement planning.

Substiute Parts

TLC354CD

Texas InstrumentsIn Stock: 1931TLC354CD 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 of the TLC354CD is determined by the following critical parameters:

Functional Compatibility:

• Number of elements: 4 channels required
• Comparator type: Differential configuration
• Output type: CMOS, MOS, open-drain, TTL compatibility

Electrical Compatibility:

• Supply voltage range must encompass or match the application requirements
• Input offset voltage and input bias current must be within acceptable limits for the circuit design
• Output current capability (20mA typical) must be maintained
• Quiescent current consumption must be acceptable for power budget

Physical & Environmental Compatibility:

• Package: 14-SOIC surface mount form factor
• Operating temperature range: Application-dependent selection
• RoHS3 compliance and MSL rating: 1 (Unlimited)

The substitute parts are grouped into two categories based on comparator type and operating temperature range:

Group 1 - General Purpose Comparators (TS339CDT, TS339IDT): 4-channel general purpose comparators with CMOS and open-drain outputs. These parts offer lower quiescent current (25µA vs. 800µA) and extended temperature range options (TS339IDT: -40°C ~ 125°C).

Group 2 - Differential Comparators (TS374CDT, TS374IDT): 4-channel differential comparators matching the TLC354CD functional type with CMOS, MOS, open-drain, and TTL output compatibility. These maintain the differential configuration with moderate quiescent current (250µA).

Parameter Comparison

Engineering Selection Recommendations

For Direct Differential Comparator Replacement:

TS374CDT and TS374IDT are the primary substitutes for TLC354CD applications requiring differential comparator functionality. Both maintain the 4-channel differential configuration with identical output type support (CMOS, MOS, open-drain, TTL). TS374CDT operates within the standard industrial temperature range (0°C ~ 70°C), matching the TLC354CD operating window. TS374IDT extends the operating temperature range to -40°C ~ 125°C for applications requiring enhanced thermal performance.

Key trade-offs: TS374 series exhibits higher input offset voltage (10mV vs. 5mV) and lower quiescent current (250µA vs. 800µA). Minimum supply voltage is higher (3V vs. 1.4V single supply).

For General Purpose Comparator Applications:

TS339CDT and TS339IDT provide alternative solutions for applications where general purpose comparator functionality is acceptable. These parts offer significantly lower quiescent current consumption (25µA) and improved input bias current performance (1pA vs. 5pA). Output type support is limited to CMOS and open-drain configurations.

TS339CDT maintains the 0°C ~ 70°C operating range. TS339IDT provides extended temperature operation (-40°C ~ 125°C) for demanding thermal environments.

Key trade-offs: General purpose configuration lacks MOS and TTL output options. Minimum supply voltage is higher (2.7V vs. 1.4V single supply).

Compliance & Certification:

All substitute parts maintain ROHS3 compliance, MSL rating of 1 (Unlimited), and REACH Unaffected status, ensuring regulatory alignment with the original TLC354CD specification.

Frequently Asked Questions (FAQ)

Q: Can TS339CDT or TS339IDT directly replace TLC354CD in all applications?

A: TS339 series parts are general purpose comparators, while TLC354CD is a differential comparator. Direct replacement is possible only if the circuit design does not require differential input configuration or MOS/TTL output compatibility. Verify output type requirements before substitution.

Q: What is the primary advantage of TS374 series over TLC354CD?

A: TS374 series maintains differential comparator functionality with significantly lower quiescent current (250µA vs. 800µA), reducing power consumption. Extended temperature variants (TS374IDT) support -40°C ~ 125°C operation compared to TLC354CD's 0°C ~ 70°C range.

Q: Are there supply voltage compatibility concerns when substituting?

A: Yes. TLC354CD supports operation down to 1.4V single supply, while TS374 series minimum is 3V and TS339 series minimum is 2.7V. Applications operating below 2.7V require the original TLC354CD or equivalent low-voltage comparators.

Q: What packaging options are available for the substitute parts?

A: TS339CDT and TS374CDT are supplied in Tape & Reel (TR) packaging. TS339IDT and TS374IDT are supplied in Cut Tape (CT) & Digi-Reel® packaging. All maintain the 14-SOIC form factor compatible with TLC354CD PCB layouts.

Q: How do input offset voltage differences affect circuit performance?

A: TLC354CD specifies 5mV input offset at 5V. TS374 series specifies 10mV at 5V, while TS339 series specifies 5mV at 10V. Higher offset voltage may require circuit-level compensation in precision comparison applications. Verify offset voltage specifications against application tolerance requirements.

Q: Is thermal performance a consideration in substitute selection?

A: Operating temperature range is a primary selection criterion. Standard temperature variants (TS374CDT, TS339CDT) match TLC354CD's 0°C ~ 70°C range. Extended temperature variants (TS374IDT, TS339IDT) support -40°C ~ 125°C operation for industrial and automotive applications.

Q: What is the input bias current performance of substitute parts?

A: TLC354CD specifies 5pA input bias at 5V. All STMicroelectronics substitutes (TS339 and TS374 series) specify 1pA at 5V, providing superior input bias current performance and reduced input leakage current.