TLC339CNSR Equivalent & Substitute Parts

Part Overview

The TLC339CNSR is a general-purpose CMOS comparator with open-drain output, manufactured by Texas Instruments in the LinCMOS™ series. This 4-element comparator IC operates across a wide supply voltage range of 3V to 16V and is housed in a 14-SO surface-mount package. The device is currently in Last Time Buy status, indicating that Texas Instruments has discontinued or will discontinue production. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications requiring this comparator functionality.

Substiute Parts

TLC339CNSR

Texas InstrumentsIn Stock: 6487TLC339CNSR Datasheet

Current PartRFQ

TLC339CDR

Texas InstrumentsIn Stock: 2401TLC339CDR Datasheet

MFR RecommendedRFQ

CMP401GRUZ-REEL

Analog Devices Inc.In Stock: 4922CMP401GRUZ-REEL Datasheet

MFR RecommendedRFQ

TS339IDT

STMicroelectronicsIn Stock: 15817TS339IDT Datasheet

MFR RecommendedRFQ

TS339IPT

STMicroelectronicsIn Stock: 19183TS339IPT Datasheet

MFR RecommendedRFQ

TS374CDT

STMicroelectronicsIn Stock: 10018TS374CDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC339CNSR is determined by the following critical parameters:

• Number of Elements: Must be 4 comparators per IC
• Output Type: Must be CMOS and Open-Drain to maintain circuit compatibility
• Supply Voltage Range: Must support 3V to 16V operation or a compatible subset
• Package Type: Surface-mount packages (14-SOIC, 14-TSSOP, 14-SO) are acceptable with pin-compatible layouts
• Input Offset Voltage: Maximum 5mV @ 10V ensures signal integrity
• Output Current: Minimum 20mA typical output current capability
• Quiescent Current: Maximum 100µA for low-power applications

The substitute parts are grouped into two categories:

Category 1 - Direct Equivalents (Same Package Family):

• TLC339CDR (Texas Instruments, 14-SOIC, Cut Tape packaging)
• TS339IDT (STMicroelectronics, 14-SO, Cut Tape packaging)

Category 2 - Functional Equivalents (Different Package):

• TS339IPT (STMicroelectronics, 14-TSSOP, Cut Tape packaging)
• TS374CDT (STMicroelectronics, 14-SO, Differential type, Tape & Reel packaging)

Category 3 - Alternative with Different Output Type:

• CMP401GRUZ-REEL (Analog Devices Inc., 16-TSSOP, CMOS/TTL output)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TLC339CDR

The TLC339CDR is the manufacturer-recommended direct equivalent from Texas Instruments. It maintains identical electrical specifications to the TLC339CNSR, including supply voltage range (3V ~ 16V), input offset voltage (5mV @ 10V), output current (20mA typical), and quiescent current (100µA maximum). The primary difference is packaging format: TLC339CDR is supplied in Cut Tape and Digi-Reel format rather than Tape & Reel. Both use the 14-SOIC package with ROHS3 compliance and MSL 1 rating. This part is currently in Active product status with 2,323 units in stock.

Secondary Recommendation: TS339IDT

The TS339IDT from STMicroelectronics is a functional equivalent with identical electrical performance for the core comparator specifications. It operates across 2.7V ~ 16V (broader than the TLC339CNSR's 3V minimum) and features superior input bias current (1pA versus 5pA) and lower quiescent current (25µA versus 100µA). The TS339IDT is housed in a 14-SO package compatible with the TLC339CNSR footprint. This part is Active with 15,753 units in stock.

Tertiary Recommendation: TS339IPT

The TS339IPT offers the same electrical performance as TS339IDT but in a 14-TSSOP package. This option is suitable for designs that can accommodate the different package footprint. It provides extended operating temperature range (-40°C ~ 125°C) and is Active with 19,094 units in stock.

Alternative for Different Package Requirements: TS374CDT

The TS374CDT is a differential comparator variant with 4 elements in a 14-SO package. It supports the same supply voltage range and output current but has higher quiescent current (250µA) and higher input offset voltage (10mV @ 5V). This part is suitable only if differential comparator functionality is acceptable for the application.

Not Recommended for Direct Substitution: CMP401GRUZ-REEL

The CMP401GRUZ-REEL from Analog Devices Inc. has significant differences that limit direct substitution. It operates on ±5V supply (not compatible with 3V ~ 16V single supply), uses a 16-TSSOP package (different pin count and layout), and has CMOS/TTL output type rather than pure CMOS open-drain. The propagation delay is significantly faster (30ns versus 4.5µs), and quiescent current is substantially higher (6mA/1mA). This part is suitable only for applications specifically designed for ±5V dual supply operation.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TLC339CNSR with TLC339CDR on my PCB?

A: Yes, with packaging considerations. Both parts use the 14-SOIC package, but the TLC339CNSR has a 0.209" (5.30mm) body width while TLC339CDR has a 0.154" (3.90mm) width. If your PCB footprint is designed for the narrower 0.154" width, TLC339CDR will fit. If your footprint is for the wider 0.209" width, you must verify footprint compatibility or use TS339IDT, which matches the original width specification.

Q: What is the difference between TLC339CDR and TS339IDT?

A: Both are functionally equivalent 4-element CMOS open-drain comparators in 14-SOIC packages. The key differences are: (1) Manufacturer—TLC339CDR is Texas Instruments, TS339IDT is STMicroelectronics; (2) Supply voltage range—TS339IDT supports 2.7V minimum versus 3V for TLC339CDR; (3) Input bias current—TS339IDT has 1pA versus 5pA for TLC339CDR; (4) Quiescent current—TS339IDT draws 25µA versus 100µA for TLC339CDR; (5) Operating temperature—TS339IDT supports -40°C ~ 125°C versus 0°C ~ 70°C for TLC339CDR. For low-power applications or extended temperature requirements, TS339IDT is superior.

Q: Can I use TS339IPT instead of TS339IDT?

A: Yes, electrically they are identical. The difference is package type: TS339IDT uses 14-SO while TS339IPT uses 14-TSSOP. Both are surface-mount packages with different footprints. Use TS339IPT only if your PCB design accommodates the 14-TSSOP footprint.

Q: Why is CMP401GRUZ-REEL not recommended as a direct substitute?

A: The CMP401GRUZ-REEL has multiple incompatibilities: (1) It requires ±5V dual supply operation, not compatible with 3V ~ 16V single supply; (2) It has 16 pins instead of 14, requiring different PCB layout; (3) Output type includes TTL, which may cause signal level incompatibilities; (4) Quiescent current is 6mA/1mA, significantly higher than the 100µA maximum of TLC339CNSR. Use CMP401GRUZ-REEL only if your application is specifically designed for ±5V dual supply operation.

Q: What does "Last Time Buy" status mean for TLC339CNSR?

A: Last Time Buy indicates that Texas Instruments has announced end-of-life for this part. No new production will occur after a specified date. Existing inventory may be available, but long-term supply is not guaranteed. Designers should transition to active alternatives such as TLC339CDR, TS339IDT, or TS339IPT to ensure future availability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed (TLC339CDR, TS339IDT, TS339IPT, TS374CDT, and CMP401GRUZ-REEL) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the TLC339CNSR.

Q: Which substitute part has the best performance for low-power applications?

A: TS339IDT and TS339IPT both offer superior low-power performance with quiescent current of 25µA (versus 100µA for TLC339CNSR and TLC339CDR). Additionally, TS339IDT and TS339IPT have lower input bias current (1pA versus 5pA), reducing power consumption in signal conditioning circuits. Choose TS339IDT for 14-SO package compatibility or TS339IPT for 14-TSSOP package compatibility.