TLC372MD Equivalent & Substitute Parts

Part Overview

The TLC372MD is a dual differential comparator IC manufactured by Texas Instruments in the LinCMOS™ series. It features CMOS, MOS, open-drain, and TTL output types in an 8-SOIC surface mount package. The device operates across a wide supply voltage range of 4V to 16V (single supply) or ±2V to ±8V (dual supply), with a maximum input offset voltage of 5mV at 5V and typical output current of 20mA.

The TLC372MD is currently in Last Time Buy status, indicating end-of-life 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	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 (±)	4V ~ 16V, ±2V ~ 8V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	5pA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	400µA
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TLC372MD are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Package type: 8-SOIC surface mount form factor
Comparator type: Differential configuration with 2 elements
Output stage: CMOS, MOS, open-drain, or TTL compatible
Supply voltage range: Minimum overlap with 4V ~ 16V single supply or ±2V ~ ±8V dual supply
Input offset voltage: Maximum 5mV specification at rated voltage
Input bias current: Maximum 5pA specification
Output current capability: Minimum 20mA typical
Operating temperature range: Support for -55°C to 125°C or compatible subset
Compliance: ROHS3 compliant, MSL 1 rating

Substitutes are categorized as:

MFR Recommended (Active Status): Direct replacements with identical or superior electrical performance and active product status
Parametric Equivalent (Obsolete Status): Parts meeting all electrical specifications but with obsolete product status

Parameter Comparison

Parameter	TLC372MD	TLC372MDR	NCS3402DR2G	TS372CDT	TS372IDT	TLC372MDG4
Manufacturer	Texas Instruments	Texas Instruments	onsemi	STMicroelectronics	STMicroelectronics	Texas Instruments
Product Status	Last Time Buy	Active	Active	Active	Active	Obsolete
Packaging	Tube	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Not Specified
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Type	Differential	Differential	General Purpose	Differential	Differential	Differential
Number of Elements	2	2	2	2	2	2
Output Type	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	Open-Drain	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL	CMOS, MOS, Open-Drain, TTL
Voltage - Supply, Single/Dual (±)	4V ~ 16V, ±2V ~ 8V	4V ~ 16V, ±2V ~ 8V	2.5V ~ 16V	3V ~ 16V, ±1.5V ~ 8V	3V ~ 16V, ±1.5V ~ 8V	4V ~ 16V, ±2V ~ 8V
Voltage - Input Offset (Max)	5mV @ 5V	5mV @ 5V	3.6mV @ 15V	10mV @ 5V	10mV @ 5V	5mV @ 5V
Current - Input Bias (Max)	5pA @ 5V	5pA @ 5V	250pA @ 15V	1pA	1pA	5pA @ 5V
Current - Output (Typ)	20mA	20mA	10mA	20mA	20mA	20mA
Current - Quiescent (Max)	400µA	400µA	640nA	375µA	375µA	400µA
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: TLC372MDR

The TLC372MDR is the direct successor to the TLC372MD, manufactured by Texas Instruments with Active product status. It maintains identical electrical specifications and LinCMOS™ series compatibility. The only difference is packaging format (Tape & Reel versus Tube), which is a procurement consideration rather than a functional limitation. This part is recommended for new designs and production transitions from the Last Time Buy TLC372MD.

Secondary Recommendation: TS372IDT

The TS372IDT, manufactured by STMicroelectronics, provides equivalent differential comparator functionality with identical output types and 20mA typical output current. It supports the full operating temperature range of -40°C to 125°C and maintains ROHS3 compliance and MSL 1 rating. The TS372IDT is available in Cut Tape and Digi-Reel® packaging formats with Active product status. Input offset voltage is specified at 10mV (versus 5mV for TLC372MD), which may require circuit validation in precision applications.

Alternative Consideration: NCS3402DR2G

The NCS3402DR2G, manufactured by onsemi, is a general-purpose comparator with open-drain output. While it meets the 8-SOIC package requirement and supports the required supply voltage range, it differs in comparator type classification and output stage configuration. Input bias current is significantly higher at 250pA versus 5pA, and typical output current is reduced to 10mA. This part is suitable only for applications where the reduced performance specifications are acceptable.

Not Recommended: TS372CDT

The TS372CDT has a restricted operating temperature range of 0°C to 70°C, which does not meet the full -55°C to 125°C specification of the TLC372MD. This part is unsuitable for applications requiring extended temperature operation.

Not Recommended: TLC372MDG4

The TLC372MDG4 has Obsolete product status and should not be selected for new designs or production applications.

Frequently Asked Questions (FAQ)

Q: Can I use TLC372MDR as a direct replacement for TLC372MD in existing designs?

A: Yes. The TLC372MDR is electrically identical to the TLC372MD with the same LinCMOS™ series specifications, supply voltage range, input offset voltage, and output current ratings. The difference is packaging format (Tape & Reel versus Tube), which does not affect circuit performance. PCB layout and schematic remain unchanged.

Q: What is the difference between TLC372MDR and TS372IDT?

A: Both are dual differential comparators in 8-SOIC packages with Active product status. The TLC372MDR is manufactured by Texas Instruments with 5mV maximum input offset voltage at 5V. The TS372IDT is manufactured by STMicroelectronics with 10mV maximum input offset voltage at 5V. The TS372IDT supports a lower minimum supply voltage (3V versus 4V) and has lower quiescent current (375µA versus 400µA). For precision applications requiring tight input offset specifications, TLC372MDR is preferred.

Q: Why is NCS3402DR2G listed as a substitute if it has different specifications?

A: The NCS3402DR2G meets the core substitution criteria of 8-SOIC package, dual-element comparator configuration, and open-drain output compatibility. However, it is classified as a general-purpose comparator rather than differential, has higher input bias current (250pA), and lower typical output current (10mA). It is a functional substitute only for applications where these performance differences are acceptable.

Q: Can I use TS372CDT in a design requiring -55°C operation?

A: No. The TS372CDT operating temperature range is 0°C to 70°C, which does not include -55°C. For applications requiring extended low-temperature operation, use TLC372MDR, TS372IDT, or TLC372MDG4.

Q: What packaging options are available for substitute parts?

A: TLC372MDR is available in Tape & Reel (TR) format. TS372IDT is available in Cut Tape (CT) and Digi-Reel® formats. NCS3402DR2G is available in Tape & Reel format. All maintain the same 8-SOIC physical form factor and surface mount compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TLC372MDR, NCS3402DR2G, TS372CDT, TS372IDT, and TLC372MDG4) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the TLC372MD compliance profile.

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