TLC2254QDR Equivalent & Substitute Parts

Part Overview

The TLC2254QDR is a general-purpose operational amplifier manufactured by Texas Instruments, featuring four independent circuits in a 14-SOIC surface-mount package. This device is classified as LinCMOS™ technology with rail-to-rail output capability and automotive-grade qualification (AEC-Q100). The TLC2254QDR is currently listed as obsolete, necessitating identification of active equivalent components that maintain functional and electrical compatibility for ongoing production and maintenance applications.

Substiute Parts

TLC2254QDR

Texas InstrumentsIn Stock: 924TLC2254QDR Datasheet

Current PartRFQ

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 TLC2254QDR is determined by the following critical parameters:

Primary Compatibility Criteria:

• Number of circuits: 4 independent amplifier channels
• Package type: 14-SOIC surface-mount configuration with 0.154" (3.90mm) width
• Output configuration: Rail-to-rail output capability
• Operating temperature range: -40°C to 125°C minimum
• Supply voltage span: Minimum 4.4 V to maximum 16 V operation

Secondary Compatibility Criteria:

• Mounting type: Surface mount
• Functional classification: General-purpose operational amplifier
• Electrical characteristics: Input bias current, input offset voltage, slew rate, and gain-bandwidth product within acceptable operational margins

The substitute parts identified (AD8548ARZ, AD8548ARZ-R7, AD8548ARZ-RL) satisfy all primary compatibility criteria. These Analog Devices components maintain identical package geometry, circuit count, and output type while operating within the specified temperature and supply voltage ranges.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The TLC2254QDR is obsolete, while all three substitute parts (AD8548ARZ, AD8548ARZ-R7, AD8548ARZ-RL) maintain active product status. Active status ensures continued availability, manufacturing support, and compliance with current regulatory requirements.

Compliance and Certification: The substitute parts are ROHS3 compliant, whereas the original TLC2254QDR is RoHS non-compliant. For applications subject to RoHS directives or environmental regulations, the AD8548 variants provide regulatory alignment. Both the original and substitute parts carry identical ECCN (EAR99) and HTSUS (8542.33.0001) classifications, indicating equivalent export and tariff treatment.

Packaging Selection:

• AD8548ARZ is supplied in Tube packaging
• AD8548ARZ-R7 and AD8548ARZ-RL are supplied in Tape & Reel (TR) packaging

For high-volume production environments, Tape & Reel packaging (AD8548ARZ-R7 or AD8548ARZ-RL) aligns with automated assembly processes. Tube packaging (AD8548ARZ) is suitable for lower-volume or manual assembly operations.

Electrical Performance Trade-offs: The AD8548 variants operate with lower supply current (18 µA total vs. 160 µA), reduced output current per channel (12 mA vs. 50 mA), and lower slew rate (0.08 V/µs vs. 0.12 V/µs). These characteristics result in reduced power consumption and heat generation. Applications requiring higher output current or faster slew rate must evaluate circuit-level impact before substitution.

The AD8548 variants support lower minimum supply voltage (2.7 V vs. 4.4 V), enabling operation in battery-powered or low-voltage applications where the TLC2254QDR cannot function.

Frequently Asked Questions (FAQ)

Q: Can AD8548ARZ, AD8548ARZ-R7, and AD8548ARZ-RL be used interchangeably?

A: Yes, from an electrical and functional perspective. All three variants are based on the AD8548 base product number and share identical electrical specifications. The differences are packaging format (Tube vs. Tape & Reel) and internal tape reel configuration codes (-R7, -RL). Selection depends on assembly process requirements and supply chain logistics.

Q: What is the primary difference between the TLC2254QDR and AD8548 variants?

A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and electrical performance characteristics. The AD8548 consumes significantly less power (18 µA vs. 160 µA total supply current) and supports lower minimum supply voltage (2.7 V vs. 4.4 V). The TLC2254QDR provides higher output current per channel (50 mA vs. 12 mA) and faster slew rate (0.12 V/µs vs. 0.08 V/µs).

Q: Are the 14-SOIC packages physically identical?

A: Yes. Both the TLC2254QDR and all AD8548 variants use 14-SOIC packages with 0.154" (3.90mm) width. Pin-to-pin compatibility is maintained, allowing direct PCB footprint reuse without layout modifications.

Q: What is the impact of lower output current in the AD8548?

A: The AD8548 provides 12 mA per channel versus 50 mA for the TLC2254QDR. Applications driving high-impedance loads or requiring significant output current must verify that 12 mA per channel is sufficient. Low-impedance loads or applications with moderate current requirements are unaffected.

Q: Does the lower slew rate of the AD8548 affect high-frequency applications?

A: The AD8548 slew rate is 0.08 V/µs versus 0.12 V/µs for the TLC2254QDR. For applications with fast transient requirements or high-frequency signal conditioning, the reduced slew rate may introduce additional settling time. Gain-bandwidth product is comparable (200 kHz vs. 210 kHz), so frequency response limitations are minimal for typical general-purpose amplifier applications.

Q: Which packaging option should be selected for production?

A: AD8548ARZ-R7 or AD8548ARZ-RL (Tape & Reel) are recommended for automated surface-mount assembly lines. AD8548ARZ (Tube) is suitable for manual assembly, prototyping, or low-volume production. Tape & Reel packaging reduces handling labor and improves pick-and-place machine compatibility.

Q: Is the automotive grade (AEC-Q100) of the TLC2254QDR maintained in the AD8548?

A: The provided specifications do not indicate AEC-Q100 qualification for the AD8548 variants. Applications requiring automotive-grade qualification must verify AEC-Q100 status with Analog Devices directly or identify alternative qualified components.