TLC374CDG4 Equivalent & Substitute Parts

Part Overview

The TLC374CDG4 is a 4-channel differential comparator IC manufactured by Texas Instruments in the LinCMOS™ series. It features CMOS, MOS, open-drain, and TTL output types, operating across a supply voltage range of 3V to 16V (single) or ±1.5V to ±8V (dual). The device is packaged in a 14-SOIC surface-mount configuration with a tube packaging format.

The TLC374CDG4 is currently in Last Time Buy status, indicating discontinued production. Equivalent and substitute parts are necessary to ensure design continuity and maintain component availability for new production runs and ongoing support.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLC374CDG4
Manufacturer	Texas Instruments
Category	Linear Comparator
Type	Differential
Number of Elements	4
Output Type	CMOS, MOS, Open-Drain, TTL
Voltage - Supply, Single/Dual (±)	3V ~ 16V, ±1.5V ~ 8V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	5pA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	800µA
Operating Temperature	0°C ~ 70°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TLC374CDG4 are grouped based on the following critical parameters that determine functional and mechanical compatibility:

Primary Substitution Criteria:

Comparator type (Differential vs. General Purpose)
Number of elements (4-channel configuration)
Output type (CMOS, MOS, Open-Drain, TTL compatibility)
Supply voltage range (3V ~ 16V single, ±1.5V ~ 8V dual)
Package type (14-SOIC surface mount)
Input offset voltage specification (5mV @ 5V or better)
Input bias current (5pA @ 5V or better)
Output current capability (20mA typical)

Substitute Categories:

Category 1: Direct Differential Comparator Substitutes (Texas Instruments)

TLC374CDR (Cut Tape & Digi-Reel packaging, Active status)
TLC374CD (Tube packaging, Last Time Buy status)

These parts maintain identical electrical specifications and differ only in packaging format and product status.

Category 2: Differential Comparator Substitutes (STMicroelectronics)

TS374CDT (Tape & Reel packaging, Active status)
TS374IDT (Cut Tape & Digi-Reel packaging, Active status, extended temperature range)

These parts provide differential comparator functionality with compatible supply voltage and output specifications. TS374IDT extends operating temperature to -40°C ~ 125°C.

Category 3: General Purpose Comparator Substitutes (STMicroelectronics)

TS339CDT (Tape & Reel packaging, Active status)
TS339IDT (Cut Tape & Digi-Reel packaging, Active status, extended temperature range)

These parts function as general-purpose comparators with compatible supply voltage and output specifications. TS339IDT extends operating temperature to -40°C ~ 125°C and offers lower quiescent current (25µA vs. 800µA).

Parameter Comparison

Parameter	TLC374CDG4	TLC374CDR	TLC374CD	TS374CDT	TS374IDT	TS339CDT	TS339IDT
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Type	Differential	Differential	Differential	Differential	Differential	General Purpose	General Purpose
Number of Elements	4	4	4	4	4	4	4
Output Type	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, Open-Drain	CMOS, Open-Drain
Voltage - Supply, Single/Dual (±)	3V ~ 16V, ±1.5V ~ 8V	3V ~ 16V, ±1.5V ~ 8V	3V ~ 16V, ±1.5V ~ 8V	3V ~ 16V, ±1.5V ~ 8V	3V ~ 16V, ±1.5V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V
Voltage - Input Offset (Max)	5mV @ 5V	5mV @ 5V	5mV @ 5V	10mV @ 5V	10mV @ 5V	5mV @ 10V	5mV @ 10V
Current - Input Bias (Max)	5pA @ 5V	5pA @ 5V	5pA @ 5V	1pA @ 5V	1pA @ 5V	1pA @ 5V	1pA @ 5V
Current - Output (Typ)	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Current - Quiescent (Max)	800µA	800µA	800µA	250µA	250µA	25µA	25µA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Last Time Buy	Active	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended for Immediate Substitution):

TLC374CDR is the primary recommended substitute. It maintains identical electrical specifications to the TLC374CDG4 while offering Active product status and improved availability through Cut Tape & Digi-Reel packaging. This part provides seamless drop-in compatibility with no design modifications required.

Tier 2 - Packaging Alternative (Same Manufacturer):

TLC374CD provides identical electrical specifications and tube packaging matching the original part format. However, it retains Last Time Buy status, limiting its long-term viability as a production solution.

Tier 3 - Cross-Manufacturer Differential Comparators (Active Status):

TS374CDT and TS374IDT are STMicroelectronics differential comparators with compatible supply voltage and output specifications. TS374IDT extends the operating temperature range to -40°C ~ 125°C, suitable for industrial and automotive applications. Input offset voltage specification is 10mV @ 5V (versus 5mV for the original part), and quiescent current is reduced to 250µA. These parts are suitable for applications where the relaxed input offset specification is acceptable.

Tier 4 - Cross-Manufacturer General Purpose Comparators (Active Status, Low Power):

TS339CDT and TS339IDT are STMicroelectronics general-purpose comparators with compatible supply voltage and output specifications. These parts offer significantly reduced quiescent current (25µA versus 800µA), making them suitable for battery-powered and low-power applications. TS339IDT extends operating temperature to -40°C ~ 125°C. The general-purpose classification indicates these parts are optimized for broader application flexibility rather than differential-specific performance. Input offset voltage is specified at 10mV @ 10V.

Selection Criteria by Application:

Standard industrial applications with 0°C ~ 70°C operating range: TLC374CDR
Extended temperature range (-40°C ~ 125°C) with differential comparator requirements: TS374IDT
Low-power applications with relaxed input offset specifications: TS339IDT
Packaging-specific requirements (tube format): TLC374CD

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical 14-SOIC package geometry, ensuring mechanical and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can TLC374CDR be used as a direct replacement for TLC374CDG4?

A: Yes. TLC374CDR is electrically and mechanically identical to TLC374CDG4. The only differences are packaging format (Cut Tape & Digi-Reel versus Tube) and product status (Active versus Last Time Buy). No design modifications are required.

Q: What is the difference between differential and general-purpose comparators in the TS339 and TS374 series?

A: Differential comparators (TS374) are optimized for applications requiring precise differential input comparison. General-purpose comparators (TS339) provide broader application flexibility with lower quiescent current consumption. Both types support the same supply voltage range and output configurations required by the TLC374CDG4.

Q: Why does TS339IDT have lower quiescent current (25µA) compared to TLC374CDG4 (800µA)?

A: The TS339 series is designed for low-power operation. This reduced quiescent current makes it suitable for battery-powered applications and systems with strict power consumption requirements. The trade-off is a relaxed input offset voltage specification (5mV @ 10V versus 5mV @ 5V).

Q: Can I use TS374CDT or TS374IDT in place of TLC374CDG4?

A: Yes, with the following considerations: Input offset voltage is specified at 10mV @ 5V (versus 5mV for the original part), and quiescent current is reduced to 250µA. These specifications are acceptable for most applications. TS374IDT additionally provides extended operating temperature range (-40°C ~ 125°C), suitable for industrial and automotive environments.

Q: What is the significance of the operating temperature range difference between TLC374CDG4 (0°C ~ 70°C) and TS374IDT (-40°C ~ 125°C)?

A: The extended temperature range of TS374IDT qualifies it for industrial, automotive, and military applications requiring operation beyond standard commercial temperature limits. If your application operates within 0°C ~ 70°C, both parts are suitable. Extended temperature range parts are necessary only for applications with specified low-temperature or high-temperature requirements.

Q: Are all substitute parts available in 14-SOIC packaging?

A: Yes. All substitute parts listed are packaged in 14-SOIC (0.154", 3.90mm Width) surface-mount configuration, ensuring mechanical compatibility with existing PCB designs and assembly processes.

Q: What packaging formats are available for substitute parts?

A: TLC374CDR is available in Cut Tape & Digi-Reel format. TLC374CD is available in Tube format. TS374CDT and TS339CDT are available in Tape & Reel format. TS374IDT and TS339IDT are available in Cut Tape & Digi-Reel format. Selection depends on production volume and assembly equipment compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring environmental and regulatory compatibility with the original TLC374CDG4.

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