TLC372CD Equivalent & Substitute Parts

Part Overview

The TLC372CD is a dual differential comparator IC manufactured by Texas Instruments in the LinCMOS™ series, housed in an 8-SOIC surface mount package. This component is classified as obsolete, with 3,270 units currently in stock. The TLC372CD operates across a wide supply voltage range (3V to 16V single supply, ±1.5V to ±8V dual supply) and features CMOS, MOS, open-drain, and TTL output configurations suitable for precision comparison applications.

Due to its obsolete product status, identifying functionally equivalent and mechanically compatible substitute parts is essential for ongoing design support, production continuity, and long-term component availability.

Key Parameters

Parameter	TLC372CD Value
Manufacturer	Texas Instruments
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
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	0°C ~ 70°C
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the TLC372CD is determined by strict alignment across the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB footprint compatibility without redesign.

Functional Equivalence: Substitute parts must maintain the dual-element (2 comparators) configuration with differential input topology and compatible output types (CMOS, MOS, open-drain, TTL).

Electrical Operating Range: Supply voltage range must encompass or match the TLC372CD specification (3V ~ 16V single supply, ±1.5V ~ ±8V dual supply). Input offset voltage, input bias current, output current, and quiescent current must remain within acceptable design margins.

Regulatory Compliance: All substitute parts must maintain ROHS3 compliance and equivalent moisture sensitivity level (MSL 1 - Unlimited).

The substitute parts are grouped into two functional categories:

Category 1 - Direct Differential Comparators: TLC372CDR, TS372CDT, and TS372IDT maintain the exact differential comparator topology with matching electrical characteristics and operating temperature ranges compatible with the original design intent.

Category 2 - General Purpose Comparators: NCS3402DR2G, TS393CDT, TS393IDT, and TS393IYDT provide general purpose comparator functionality with enhanced performance specifications (lower input bias current, improved CMRR/PSRR) and extended operating temperature ranges, suitable for applications where the differential topology is not mandatory.

Parameter Comparison

Parameter	TLC372CD	TLC372CDR	TS372CDT	TS372IDT	NCS3402DR2G	TS393CDT	TS393IDT	TS393IYDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
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	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Obsolete	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

Engineering Selection Recommendations

Primary Recommendation - TLC372CDR (Texas Instruments): This is the manufacturer-recommended direct replacement, maintaining identical electrical specifications, operating temperature range (0°C ~ 70°C), and differential comparator topology. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tube), which does not affect functional performance. With 25,100 units in stock and active product status, this part provides the highest design continuity and lowest integration risk.

Secondary Recommendation - TS372CDT or TS372IDT (STMicroelectronics): Both parts maintain the differential comparator topology with compatible electrical specifications. TS372IDT extends the operating temperature range to -40°C ~ 125°C, providing broader environmental coverage. TS372CDT is limited to 0°C ~ 70°C. Both are manufactured by an established supplier with active product status and substantial inventory (10,400 and 19,135 units respectively).

Extended Temperature Alternative - TS393IDT or TS393IYDT (STMicroelectronics): These general purpose comparators offer extended operating temperature range (-40°C ~ 125°C) and significantly reduced quiescent current (25µA versus 400µA), beneficial for battery-powered or thermally constrained applications. TS393IYDT includes AEC-Q100 automotive qualification. These parts are suitable only if the application does not mandate differential input topology. Inventory levels are high (22,736 and 29,300 units).

Low-Power Alternative - NCS3402DR2G (onsemi): This general purpose comparator provides the lowest quiescent current (640nA) and extended operating temperature range (-40°C ~ 125°C), with enhanced CMRR (88dB) and PSRR (105dB) specifications. Output type is limited to open-drain. Suitable for ultra-low-power applications where differential topology is not required. 9,125 units in stock.

Frequently Asked Questions (FAQ)

Q: Can TLC372CDR be used as a direct drop-in replacement for TLC372CD?

A: Yes. TLC372CDR is the manufacturer-recommended equivalent with identical electrical specifications, operating temperature range, and differential comparator topology. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tube), which does not affect circuit performance or PCB assembly compatibility.

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

A: Differential comparators (TLC372CDR, TS372CDT, TS372IDT) are optimized for comparing two independent input signals with high common-mode rejection. General purpose comparators (NCS3402DR2G, TS393CDT, TS393IDT, TS393IYDT) provide more flexible input configurations. Both types are housed in the same 8-SOIC package and are electrically compatible with the TLC372CD supply voltage range.

Q: Which substitute part has the lowest power consumption?

A: NCS3402DR2G has the lowest quiescent current at 640nA (typical), compared to 400µA for the TLC372CD. TS393 series parts consume 25µA. Selection depends on whether the application requires differential topology or can accept general purpose comparator functionality.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching the regulatory status of the TLC372CD.

Q: What is the operating temperature range difference, and does it matter?

A: The TLC372CD and TLC372CDR operate from 0°C to 70°C. TS372IDT, TS393IDT, TS393IYDT, and NCS3402DR2G extend this to -40°C to 125°C. Extended range parts are necessary only if the application requires operation outside the 0°C to 70°C window. Standard temperature parts are sufficient for commercial and industrial environments within this range.

Q: Can I use TS393IYDT in automotive applications?

A: TS393IYDT carries AEC-Q100 automotive qualification, making it suitable for automotive-grade applications. Other parts in this list do not carry automotive qualification and should not be used in automotive designs without additional qualification testing.

Q: Is the 8-SOIC package identical across all substitute parts?

A: Yes. All parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring PCB footprint compatibility without layout redesign.

Q: What is the input offset voltage difference between TLC372CD and TS372CDT?

A: TLC372CD specifies 5mV maximum input offset at 5V, while TS372CDT specifies 10mV maximum at 5V. This difference is acceptable for most applications but should be evaluated if precision threshold detection is critical.

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