TLC3574IDWRG4 Equivalent & Substitute Parts

Part Overview

The TLC3574IDWRG4 is a 14-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring multi-channel input capability. This device features a Successive Approximation Register (SAR) architecture with 2 or 4 selectable input channels, operating at a sampling rate of 200 kSPS. The part is packaged in a 20-SOIC surface mount configuration and operates across industrial temperature ranges from -40°C to 85°C.

The TLC3574IDWRG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

TLC3574IDWRG4

Texas InstrumentsIn Stock: 794TLC3574IDWRG4 Datasheet

Current PartRFQ

TLC3574IDWR

Texas InstrumentsIn Stock: 1255TLC3574IDWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC3574IDWRG4 is determined by strict equivalence across the following critical parameters:

• 14-bit resolution requirement
• 200 kSPS sampling rate specification
• Multi-channel input configuration (2 or 4 channels)
• Pseudo-Differential and Single Ended input support
• SPI serial data interface
• SAR architecture with external reference capability
• 5V analog supply and 2.7V ~ 5.5V digital supply compatibility
• 20-SOIC package footprint and surface mount compatibility
• Industrial temperature range (-40°C ~ 85°C)
• ROHS3 compliance and MSL Level 1 rating

The TLC3574IDWR qualifies as a direct manufacturer-recommended substitute, maintaining identical electrical specifications and package configuration while differing only in packaging format (Cut Tape and Digi-Reel versus the original tube packaging).

Parameter Comparison

Engineering Selection Recommendations

The TLC3574IDWR is the manufacturer-recommended substitute for the discontinued TLC3574IDWRG4. Both devices are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the original part is discontinued, while the substitute is designated as Last Time Buy, indicating limited availability.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications. The MSL Level 1 rating for both devices indicates unlimited shelf life under standard storage conditions.

The substitute part is available in higher inventory quantities (1229 units versus 755 units for the original), providing improved procurement flexibility. The packaging format difference (Cut Tape and Digi-Reel versus tube) does not affect electrical performance or PCB assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TLC3574IDWR be used as a direct replacement for the TLC3574IDWRG4?

A: Yes. The TLC3574IDWR is the manufacturer-recommended substitute with identical electrical specifications, pin configuration, and package footprint. No circuit modifications are required.

Q: What is the difference between the TLC3574IDWRG4 and TLC3574IDWR?

A: The devices are electrically identical. The difference is packaging format: the original uses tube packaging (G4 suffix), while the substitute uses Cut Tape and Digi-Reel packaging. Both are 20-SOIC surface mount packages with identical footprints.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL Level 1 rating. Regulatory requirements are identical.

Q: What is the significance of the "Last Time Buy" status for the substitute part?

A: Last Time Buy indicates that Texas Instruments has announced end-of-life for this product line. Inventory is available but will not be replenished after current stock is depleted. Long-term designs should evaluate alternative ADC solutions from current product families.

Q: Are the pin assignments and SPI interface identical between the two parts?

A: Yes. Both devices use identical 20-SOIC pin assignments and SPI serial interface protocols. PCB layout and firmware integration remain unchanged.

Q: Can both parts operate with the same external reference circuit?

A: Yes. Both devices require external reference voltage and operate with identical reference specifications. Existing reference circuits are fully compatible.