TLC339CNS Equivalent & Substitute Parts

Part Overview

The TLC339CNS is a general-purpose CMOS comparator with open-drain output configuration, manufactured by Texas Instruments in a 14-SO package. This device is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production needs. The TLC339CNS operates across a 3V to 16V supply voltage range and is suitable for applications requiring low input offset voltage and low input bias current characteristics.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLC339CNS
Manufacturer	Texas Instruments
Category	Linear
Type	General Purpose
Number of Elements	4
Output Type	CMOS, Open-Drain
Voltage - Supply, Single/Dual (±)	3V ~ 16V
Voltage - Input Offset (Max)	5mV @ 10V
Current - Input Bias (Max)	5pA @ 5V
Current - Output (Typ)	20mA
Current - Quiescent (Max)	100µA
CMRR, PSRR (Typ)	84dB CMRR
Propagation Delay (Max)	4.5µs
Operating Temperature	0°C ~ 70°C
Package / Case	14-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution for the TLC339CNS is determined by the following critical parameters:

Number of Elements: Must be 4 comparators per package
Output Type: Must support CMOS and open-drain configuration
Supply Voltage Range: Must encompass or exceed 3V ~ 16V
Input Offset Voltage: Maximum 5mV @ 10V
Input Bias Current: Maximum 5pA @ 5V
Output Current: Minimum 20mA typical
Quiescent Current: Maximum 100µA
Package Compatibility: Surface mount configuration required

Two substitute parts meet these criteria with varying degrees of parameter alignment:

TS339IPT (STMicroelectronics): Meets all critical electrical parameters with enhanced performance characteristics and extended operating temperature range. Package format differs (14-TSSOP vs. 14-SOIC).

TS374CDT (STMicroelectronics): Meets core electrical parameters but differs in comparator type (differential vs. general purpose) and quiescent current specification (250µA vs. 100µA maximum).

Parameter Comparison

Parameter	TLC339CNS	TS339IPT	TS374CDT
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics
Type	General Purpose	General Purpose	Differential
Number of Elements	4	4	4
Output Type	CMOS, Open-Drain	CMOS, Open-Drain	CMOS, MOS, Open-Drain, TTL
Voltage - Supply, Single/Dual (±)	3V ~ 16V	2.7V ~ 16V, ±1.35V ~ 8V	3V ~ 16V, ±1.5V ~ 8V
Voltage - Input Offset (Max)	5mV @ 10V	5mV @ 10V	10mV @ 5V
Current - Input Bias (Max)	5pA @ 5V	1pA @ 5V	1pA @ 5V
Current - Output (Typ)	20mA	20mA	20mA
Current - Quiescent (Max)	100µA	25µA	250µA
Operating Temperature	0°C ~ 70°C	-40°C ~ 125°C	0°C ~ 70°C
Package / Case	14-SOIC (0.209", 5.30mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-SOIC (0.154", 3.90mm Width)
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TS339IPT is the primary substitute for TLC339CNS applications. This part maintains functional equivalence as a general-purpose CMOS comparator with identical input offset voltage specification and superior input bias current performance. The TS339IPT offers extended operating temperature range (-40°C to 125°C) and reduced quiescent current (25µA), providing enhanced reliability for broader environmental conditions. Both parts are ROHS3 compliant and actively manufactured. Package transition from 14-SOIC to 14-TSSOP requires PCB layout modification but maintains electrical compatibility.

TS374CDT serves as a secondary substitute when differential comparator functionality is acceptable. This part maintains the same supply voltage range and operating temperature as the original TLC339CNS. However, the TS374CDT specification includes higher input offset voltage (10mV @ 5V) and elevated quiescent current (250µA maximum), making it suitable only for applications where these parameter variations do not impact system performance. The differential comparator type represents a functional deviation from the general-purpose architecture of the TLC339CNS.

Frequently Asked Questions (FAQ)

Q: Can TS339IPT directly replace TLC339CNS without circuit modification?

A: Electrical substitution is direct. The TS339IPT maintains all critical electrical parameters including input offset voltage, output current, and supply voltage range. PCB layout modification is required due to package format change from 14-SOIC to 14-TSSOP, with different pin pitch and body dimensions.

Q: What is the primary difference between TS339IPT and TS374CDT?

A: TS339IPT is a general-purpose comparator matching the TLC339CNS functional classification. TS374CDT is a differential comparator with higher input offset voltage (10mV vs. 5mV) and significantly higher quiescent current (250µA vs. 100µA). Selection depends on application requirements for comparator type and power consumption tolerance.

Q: Are both substitute parts currently available?

A: Yes. Both TS339IPT and TS374CDT are active products manufactured by STMicroelectronics, with inventory availability exceeding 9,000 units each. The original TLC339CNS is discontinued at DiGi Electronics.

Q: Does the TS339IPT extended temperature range affect compatibility?

A: The TS339IPT operating range of -40°C to 125°C encompasses the original TLC339CNS range of 0°C to 70°C. Extended temperature capability provides additional design margin without introducing compatibility issues for applications within the original temperature specification.

Q: What are the package dimension implications for PCB redesign?

A: TLC339CNS uses 14-SOIC with 5.30mm width. TS339IPT uses 14-TSSOP with 4.40mm width (narrower). TS374CDT uses 14-SOIC with 3.90mm width (narrower). Pin pitch and body length also differ. PCB footprint redesign is mandatory for either substitute.

Q: Are all three parts RoHS compliant?

A: Yes. TLC339CNS, TS339IPT, and TS374CDT are all ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level).

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