TLC2254QDREP Equivalent & Substitute Parts

Part Overview

The TLC2254QDREP is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface mount package. Manufactured by Texas Instruments under the LinCMOS™ series, this device delivers rail-to-rail output capability with low input bias current and is qualified to AEC-Q100 automotive standards. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity.

Substiute Parts

TLC2254QDREP

Texas InstrumentsIn Stock: 1058TLC2254QDREP Datasheet

Current PartRFQ

TLC2254AIDR

Texas InstrumentsIn Stock: 17351TLC2254AIDR Datasheet

DirectRFQ

TLC2254IDR

Texas InstrumentsIn Stock: 21092TLC2254IDR Datasheet

MFR RecommendedRFQ

AD8548ARZ

Analog Devices Inc.In Stock: 2292AD8548ARZ Datasheet

MFR RecommendedRFQ

AD8548ARZ-R7

Analog Devices Inc.In Stock: 2119AD8548ARZ-R7 Datasheet

MFR RecommendedRFQ

AD8548ARZ-RL

Analog Devices Inc.In Stock: 786AD8548ARZ-RL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC2254QDREP is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Number of circuits: 4 independent amplifier channels
• Output configuration: Rail-to-rail capability
• Package type: 14-SOIC surface mount form factor
• Operating temperature range: -40°C to 125°C minimum
• Supply voltage span: Minimum 4.4 V to maximum 16 V
• Mounting type: Surface mount

Substitute Categories:

Category 1: Direct Texas Instruments Equivalents TLC2254AIDR and TLC2254IDR are active production variants of the same base product number (TLC2254). These parts maintain identical electrical specifications to the obsolete TLC2254QDREP, including slew rate (0.12 V/µs), gain bandwidth product (210 kHz), input bias current (1 pA), and output current per channel (50 mA). Both are available in active product status with higher inventory levels.

Category 2: Analog Devices Cross-Substitutes AD8548ARZ, AD8548ARZ-R7, and AD8548ARZ-RL are CMOS amplifiers from Analog Devices that share the same 14-SOIC package and four-circuit configuration. These parts operate within the required temperature range and supply voltage specifications. However, they exhibit different electrical characteristics: lower slew rate (0.08 V/µs), lower gain bandwidth product (200 kHz), higher input bias current (5 pA), higher input offset voltage (3 mV), and reduced output current per channel (12 mA). These differences are within acceptable tolerance for general-purpose amplifier applications where the TLC2254QDREP specifications do not represent hard design constraints.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select TLC2254AIDR or TLC2254IDR when the design requires exact electrical parameter matching to the obsolete TLC2254QDREP. Both parts are active production items from Texas Instruments with identical specifications. TLC2254IDR is the manufacturer-recommended primary choice, with 21,005 units in current inventory. TLC2254AIDR is available as a secondary option with 17,300 units in stock. Both maintain ROHS3 compliance and MSL 1 rating.

For Cross-Manufacturer Substitution: Select AD8548ARZ, AD8548ARZ-R7, or AD8548ARZ-RL when design constraints permit tolerance of reduced slew rate, lower output current capability, and higher input offset voltage. These Analog Devices parts are active production components with ROHS3 compliance and MSL 1 rating. AD8548ARZ-R7 and AD8548ARZ-RL differ only in packaging format (Tape & Reel versus Tube). The AD8548 series offers lower supply current consumption (18 µA versus 160 µA) and extended minimum supply voltage capability (2.7 V versus 4.4 V), which may provide advantages in low-power or wide-supply-range applications.

All substitute parts maintain the required operating temperature range (-40°C to 125°C) and 14-SOIC surface mount package compatibility.

Frequently Asked Questions (FAQ)

Q: Can TLC2254AIDR and TLC2254IDR be used interchangeably with TLC2254QDREP?

A: Yes. Both parts are active production variants of the same base product number (TLC2254) with identical electrical specifications. They are direct functional equivalents suitable for one-to-one replacement in existing designs. The primary difference is product status: TLC2254QDREP is obsolete, while TLC2254AIDR and TLC2254IDR are in active production.

Q: What are the key differences between Texas Instruments TLC2254 variants and Analog Devices AD8548 variants?

A: The TLC2254 and AD8548 share the same 14-SOIC package and four-circuit configuration but differ in amplifier technology and electrical performance. TLC2254 uses LinCMOS™ technology with higher slew rate (0.12 V/µs), higher gain bandwidth product (210 kHz), lower input bias current (1 pA), lower input offset voltage (200 µV), and higher output current per channel (50 mA). AD8548 uses CMOS technology with lower slew rate (0.08 V/µs), lower gain bandwidth product (200 kHz), higher input bias current (5 pA), higher input offset voltage (3 mV), and lower output current per channel (12 mA). AD8548 offers lower supply current consumption (18 µA versus 160 µA) and lower minimum supply voltage (2.7 V versus 4.4 V).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TLC2254AIDR, TLC2254IDR, AD8548ARZ, AD8548ARZ-R7, and AD8548ARZ-RL are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the difference between AD8548ARZ, AD8548ARZ-R7, and AD8548ARZ-RL?

A: These three parts are electrically identical. The differences are in packaging format: AD8548ARZ is supplied in Tube packaging, while AD8548ARZ-R7 and AD8548ARZ-RL are supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q: Can AD8548 variants be used in automotive applications requiring AEC-Q100 qualification?

A: The provided specifications do not indicate AEC-Q100 qualification for AD8548 variants. The original TLC2254QDREP carries AEC-Q100 qualification. If automotive qualification is a design requirement, use TLC2254AIDR or TLC2254IDR, which maintain the same qualification status as the obsolete part.

Q: What supply voltage range is required for each substitute?

A: TLC2254QDREP, TLC2254AIDR, and TLC2254IDR require 4.4 V to 16 V supply span. AD8548ARZ, AD8548ARZ-R7, and AD8548ARZ-RL operate across 2.7 V to 18 V supply span, providing greater flexibility for low-voltage and extended-range applications.

Q: Are there inventory considerations when selecting a substitute?

A: Current inventory levels are: TLC2254IDR (21,005 units), TLC2254AIDR (17,300 units), AD8548ARZ (2,200 units), AD8548ARZ-R7 (2,070 units), and AD8548ARZ-RL (756 units). For high-volume procurement, TLC2254IDR offers the largest available stock.