TLC372ID Equivalent & Substitute Parts

Part Overview

The TLC372ID is a dual differential comparator IC manufactured by Texas Instruments in 8-SOIC surface mount packaging. This LinCMOS™ series device operates across a wide supply voltage range (3V ~ 16V single supply, ±1.5V ~ 8V dual supply) and is designed for precision voltage comparison applications. The TLC372ID carries a Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and field replacements.

Key Parameters

Parameter	TLC372ID Value
Type	Differential
Number of Elements	2
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)	400µA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TLC372ID is determined by the following critical parameters:

Electrical Compatibility Requirements:

Comparator type (Differential vs. General Purpose)
Supply voltage range overlap with 3V ~ 16V single supply and ±1.5V ~ 8V dual supply
Output type compatibility (CMOS, MOS, Open-Drain, TTL)
Input offset voltage specification
Input bias current specification
Output current capability (minimum 20mA typical)
Quiescent current within acceptable limits

Physical & Packaging Requirements:

8-SOIC package form factor (0.154", 3.90mm Width)
Surface mount mounting type
Pin-compatible footprint

Compliance Requirements:

ROHS3 compliance
MSL 1 (Unlimited) moisture sensitivity level

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (Differential Comparators) Parts maintaining differential comparator topology with matching electrical specifications: TLC372IDR, TS372IDT, TS372CDT

Category 2: Functional Alternatives (General Purpose Comparators) Parts with general purpose comparator topology and broader supply voltage ranges: NCS3402DR2G, TS393CDT, TS393IDT, TS393IYDT

Parameter Comparison

Parameter	TLC372ID	TLC372IDR	TS372IDT	TS372CDT	NCS3402DR2G	TS393CDT	TS393IDT	TS393IYDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics
Type	Differential	Differential	Differential	Differential	General Purpose	General Purpose	General Purpose	General Purpose
Number of Elements	2	2	2	2	2	2	2	2
Output Type	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	Open-Drain	CMOS, Open-Drain	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	2.5V ~ 16V	2.7V ~ 16V, ±1.35V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V
Voltage - Input Offset (Max)	5mV @ 5V	5mV @ 5V	10mV @ 5V	10mV @ 5V	3.6mV @ 15V	5mV @ 10V	5mV @ 10V	5mV @ 10V
Current - Input Bias (Max)	5pA @ 5V	5pA @ 5V	1pA	1pA	250pA @ 15V	1pA @ 5V	1pA @ 5V	1pA @ 5V
Current - Output (Typ)	20mA	20mA	20mA	20mA	10mA	20mA	20mA	20mA
Current - Quiescent (Max)	400µA	400µA	375µA	375µA	640nA	25µA	25µA	25µA
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	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Packaging Format	Tube	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Qualification	-	-	-	-	-	-	-	AEC-Q100

Engineering Selection Recommendations

Primary Recommendation: TLC372IDR

The TLC372IDR is the manufacturer-recommended direct substitute for the TLC372ID. Both parts share identical electrical specifications, including differential comparator topology, supply voltage range (3V ~ 16V, ±1.5V ~ 8V), input offset voltage (5mV @ 5V), and output characteristics. The TLC372IDR maintains Active product status with 30,200 units in stock, ensuring long-term availability. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tube), which does not affect electrical performance or pin compatibility. ROHS3 compliance is maintained.

Secondary Recommendation: TS372IDT

The TS372IDT (STMicroelectronics) provides differential comparator functionality with identical supply voltage range and output type. This part extends the operating temperature range to -40°C ~ 125°C, offering improved thermal performance compared to the TLC372ID. Input offset voltage is specified at 10mV @ 5V (versus 5mV @ 5V for TLC372ID), representing a minor degradation in precision. Input bias current is superior at 1pA. The TS372IDT is Active with 19,135 units in stock and maintains ROHS3 compliance.

Tertiary Recommendation: TS372CDT

The TS372CDT (STMicroelectronics) is electrically equivalent to TS372IDT but with restricted operating temperature range (0°C ~ 70°C). This part is suitable only for applications not requiring extended low-temperature operation. It is Active with 10,400 units in stock.

Alternative for Extended Supply Range: NCS3402DR2G

The NCS3402DR2G (onsemi) is a general purpose comparator with extended lower supply voltage limit (2.5V minimum versus 3V). This part features superior quiescent current (640nA versus 400µA) and includes CMRR/PSRR specifications (88dB CMRR, 105dB PSRR). Output type is limited to Open-Drain only. Operating temperature range extends to -40°C ~ 125°C. This part is suitable for applications requiring lower supply voltages or reduced power consumption but may require circuit redesign due to output type differences.

General Purpose Alternatives: TS393 Series

The TS393CDT, TS393IDT, and TS393IYDT (STMicroelectronics) are general purpose comparators with broader supply voltage range (2.7V ~ 16V, ±1.35V ~ 8V). These parts feature significantly lower quiescent current (25µA) and include CMRR specification (71dB). Operating temperature ranges vary: TS393CDT (0°C ~ 70°C), TS393IDT and TS393IYDT (-40°C ~ 125°C). The TS393IYDT includes AEC-Q100 automotive qualification. These parts are suitable for applications where general purpose comparator topology is acceptable and lower power consumption is beneficial. Output type is CMOS/Open-Drain only.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TLC372ID with TLC372IDR without circuit modifications?

A: Yes. The TLC372IDR is the manufacturer-recommended equivalent with identical electrical specifications and pin-compatible 8-SOIC packaging. The only difference is the packaging format (Cut Tape & Digi-Reel® versus Tube), which does not affect circuit performance or PCB assembly.

Q: What is the key difference between differential and general purpose comparators in this list?

A: Differential comparators (TLC372ID, TLC372IDR, TS372IDT, TS372CDT) are optimized for precision voltage comparison with tighter input offset voltage specifications. General purpose comparators (NCS3402DR2G, TS393 series) offer broader supply voltage ranges and lower power consumption but may have relaxed precision specifications. Differential comparators are preferred when input offset voltage accuracy is critical.

Q: Can I use TS393IYDT in automotive applications?

A: Yes. The TS393IYDT carries AEC-Q100 qualification, making it suitable for automotive-grade applications. However, it is a general purpose comparator, not a differential comparator, so circuit performance characteristics will differ from the TLC372ID.

Q: Why does NCS3402DR2G have lower quiescent current than other options?

A: The NCS3402DR2G is designed for low-power applications with quiescent current of 640nA compared to 400µA (TLC372ID) or 25µA (TS393 series). This represents a trade-off: lower power consumption but limited output type (Open-Drain only) and different comparator topology (general purpose).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, ensuring compatibility with environmental regulations and supply chain requirements.

Q: What is the impact of operating temperature range differences?

A: The TLC372ID operates from -40°C ~ 85°C. Substitute parts offer either identical range (TLC372IDR), extended range to 125°C (TS372IDT, NCS3402DR2G, TS393IDT, TS393IYDT), or restricted range to 70°C (TS372CDT, TS393CDT). Extended temperature range parts provide greater design margin for harsh environments. Restricted range parts are suitable only for controlled temperature applications.

Q: Can I use a general purpose comparator (TS393 series) in place of a differential comparator (TLC372ID)?

A: General purpose comparators can function in many applications, but they are not direct equivalents. The TS393 series has different input offset voltage specifications, lower quiescent current, and different output type options. Circuit redesign and performance validation are required before substitution.

Q: What packaging formats are available for these parts?

A: TLC372ID is supplied in Tube format. Substitute parts are available in Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) formats. All maintain the same 8-SOIC physical package. Packaging format selection depends on assembly process requirements and volume.

Q: Is the input bias current difference between parts significant?

A: Input bias current ranges from 1pA (TS372IDT, TS372CDT, TS393 series) to 250pA (NCS3402DR2G). For most applications, this difference is negligible. High-impedance input circuits may benefit from lower bias current specifications.

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