TLC374IDRG4 Equivalent & Substitute Parts

Part Overview

The TLC374IDRG4 is a 4-channel differential comparator IC manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This device is classified as a LinCMOS™ series comparator with CMOS, MOS, open-drain, and TTL output types. The TLC374IDRG4 is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across supply voltage ranges, input offset specifications, output current ratings, and thermal operating ranges while accommodating different packaging and availability options.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLC374IDRG4
Manufacturer	Texas Instruments
Category	Linear
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	-40°C ~ 85°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 TLC374IDRG4 are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Number of elements: 4 channels
Output type compatibility: CMOS, MOS, open-drain, TTL
Supply voltage range: 3V ~ 16V single supply or ±1.5V ~ 8V dual supply
Input offset voltage: 5mV maximum @ 5V
Input bias current: 5pA maximum @ 5V
Output current: 20mA typical
Package type: 14-SOIC surface mount
Thermal operating range: Minimum -40°C to 85°C

Substitution Categories:

Category 1 - Parametric Equivalent (Same Manufacturer): TLC374IDR maintains identical electrical specifications and is available in cut tape and Digi-Reel packaging with active product status.

Category 2 - Functional Equivalent (Alternative Manufacturer): TS339IDT, TS339CDT, TS374IDT, and TS374CDT from STMicroelectronics provide functional equivalence with compatible electrical parameters. TS339 series devices are general-purpose comparators; TS374 series devices are differential comparators matching the TLC374IDRG4 type classification.

Parameter Comparison

Parameter	TLC374IDRG4	TLC374IDR	TS339IDT	TS339CDT	TS374IDT	TS374CDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Type	Differential	Differential	General Purpose	General Purpose	Differential	Differential
Number of Elements	4	4	4	4	4	4
Output Type	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, Open-Drain	CMOS, Open-Drain	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL
Voltage - Supply, Single/Dual (±)	3V ~ 16V, ±1.5V ~ 8V	3V ~ 16V, ±1.5V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V	3V ~ 16V, ±1.5V ~ 8V	3V ~ 16V, ±1.5V ~ 8V
Voltage - Input Offset (Max)	5mV @ 5V	5mV @ 5V	5mV @ 10V	5mV @ 10V	10mV @ 5V	10mV @ 5V
Current - Input Bias (Max)	5pA @ 5V	5pA @ 5V	1pA @ 5V	1pA @ 5V	1pA @ 5V	1pA @ 5V
Current - Output (Typ)	20mA	20mA	20mA	20mA	20mA	20mA
Current - Quiescent (Max)	800µA	800µA	25µA	25µA	250µA	250µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	0°C ~ 70°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

First Choice - TLC374IDR: This part is the direct parametric equivalent to the TLC374IDRG4, manufactured by Texas Instruments with identical electrical specifications. It maintains active product status and is available in cut tape and Digi-Reel packaging formats. Selection of TLC374IDR eliminates any electrical performance variation and ensures design continuity.

Alternative Choice - TS374IDT or TS374CDT: These STMicroelectronics differential comparators maintain the same comparator type classification and output type compatibility as the original part. TS374IDT offers the widest operating temperature range (-40°C ~ 125°C) and is available in cut tape packaging. TS374CDT is available in tape and reel format. Both parts are ROHS3 compliant and carry active product status. The primary electrical difference is a maximum input offset voltage of 10mV versus 5mV for the TLC374IDRG4, which may be acceptable depending on application precision requirements.

Secondary Alternative - TS339IDT or TS339CDT: These general-purpose comparators from STMicroelectronics provide functional compatibility with lower quiescent current (25µA versus 800µA) and improved input bias current (1pA versus 5pA). TS339IDT supports the extended temperature range (-40°C ~ 125°C). These parts are suitable for applications where the general-purpose comparator classification is acceptable and power efficiency is prioritized. Output type is limited to CMOS and open-drain, excluding MOS and TTL options.

Compliance Considerations: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can TLC374IDR be used as a direct replacement for TLC374IDRG4?

A: Yes. TLC374IDR is a parametric equivalent with identical electrical specifications, supply voltage ranges, input offset voltage, bias current, output current, and quiescent current ratings. Both parts are housed in 14-SOIC packages and support the same operating temperature range. The primary difference is packaging format and product status; TLC374IDR is currently active.

Q: What is the difference between TS374 and TS339 series comparators?

A: TS374 devices are classified as differential comparators, matching the TLC374IDRG4 type. TS339 devices are general-purpose comparators. Both provide 4-channel configurations in 14-SOIC packages. TS339 parts offer lower quiescent current consumption (25µA) but have output types limited to CMOS and open-drain, excluding MOS and TTL options available in TS374 and TLC374 devices.

Q: Are there temperature range limitations when substituting with TS339CDT or TS374CDT?

A: Yes. TS339CDT and TS374CDT are rated for 0°C ~ 70°C operating temperature, which is narrower than the TLC374IDRG4 range of -40°C ~ 85°C. These parts are suitable only for applications operating within the 0°C ~ 70°C window. TS339IDT and TS374IDT extend to -40°C ~ 125°C and are appropriate for wider temperature applications.

Q: What is the significance of the input offset voltage difference between TLC374IDRG4 (5mV) and TS374 series (10mV)?

A: Input offset voltage determines the maximum error in comparator threshold accuracy. The TLC374IDRG4 specifies 5mV maximum offset at 5V supply, while TS374 series devices specify 10mV maximum. Applications requiring precision threshold detection within ±5mV should use TLC374IDR or TS339 series. Applications tolerating ±10mV offset variation can use TS374 series devices.

Q: Can packaging format (cut tape versus tape and reel) affect circuit performance?

A: No. Packaging format affects handling, storage, and assembly processes but does not alter electrical performance. TLC374IDR, TS339IDT, and TS374IDT are available in cut tape format; TS339CDT and TS374CDT are available in tape and reel format. Selection should be based on assembly equipment compatibility and inventory management requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TLC374IDR, TS339IDT, TS339CDT, TS374IDT, and TS374CDT are all ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating and REACH unaffected status, ensuring regulatory alignment with the discontinued TLC374IDRG4.

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