TLC251ACD Equivalent & Substitute Parts

Part Overview

The TLC251ACD is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device is classified as a Last Time Buy product, indicating that it is no longer in active production. The TLC251ACD operates within a supply voltage range of 1.4 V to 16 V and is designed for applications requiring low-power amplification with moderate bandwidth performance.

Due to its Last Time Buy status, identifying functionally compatible substitute components is essential for design continuity and long-term product support. Substitute parts must maintain compatibility across critical electrical parameters including supply voltage range, amplifier type, number of circuits, and operating temperature specifications.

Substiute Parts

TLC251ACD

Texas InstrumentsIn Stock: 2208TLC251ACD Datasheet

Current PartRFQ

TLV9151IDBVR

Texas InstrumentsIn Stock: 2372TLV9151IDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC251ACD is determined by the following critical parameters:

Functional Compatibility Criteria:

• Amplifier Type: General Purpose
• Number of Circuits: 1 (single amplifier per package)
• Supply Voltage Range: Minimum 1.4 V, Maximum 16 V
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant

Performance Considerations:

• Slew Rate: 5.3 V/µs (minimum acceptable performance)
• Gain Bandwidth Product: 2.2 MHz (minimum acceptable performance)
• Input Bias Current: 0.7 pA (low-bias specification)
• Input Offset Voltage: 900 µV (offset specification)
• Supply Current: 950 µA (power consumption specification)

The TLV9151IDBVR qualifies as a manufacturer-recommended substitute because it maintains the general-purpose amplifier classification, single-circuit configuration, and overlapping supply voltage range (2.7 V to 16 V). While the TLV9151IDBVR operates at a higher minimum supply voltage (2.7 V versus 1.4 V), it exceeds the performance specifications of the TLC251ACD in slew rate, gain bandwidth product, and input offset voltage, making it suitable for applications where the higher minimum voltage is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TLV9151IDBVR

The TLV9151IDBVR is the manufacturer-recommended substitute for the TLC251ACD. Selection of this substitute is justified on the following engineering grounds:

Product Status Justification: The TLC251ACD is designated as Last Time Buy, indicating end-of-life status. The TLV9151IDBVR is in Active production status, ensuring long-term availability and supply chain continuity.

Compliance and Certification: Both devices maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for equivalent component substitution.

Performance Enhancement: The TLV9151IDBVR exceeds the electrical performance specifications of the TLC251ACD across multiple parameters: slew rate (20 V/µs versus 5.3 V/µs), gain bandwidth product (4.5 MHz versus 2.2 MHz), input offset voltage (125 µV versus 900 µV), and supply current (560 µA versus 950 µA). These improvements provide design margin and reduced power consumption.

Supply Voltage Compatibility: The TLV9151IDBVR operates within a supply voltage range of 2.7 V to 16 V. Applications requiring operation below 2.7 V are not compatible with this substitute. For such applications, alternative substitutes must be evaluated.

Package Consideration: The TLV9151IDBVR uses a SOT-23-5 package, whereas the TLC251ACD uses an 8-SOIC package. PCB layout modification is required for substitution. Pin-to-pin functional mapping must be verified during design integration.

Temperature Range: The TLV9151IDBVR supports an extended operating temperature range of -40°C to 125°C, compared to the TLC251ACD range of 0°C to 70°C. This provides additional operational flexibility for temperature-sensitive applications.

Frequently Asked Questions (FAQ)

Q1: Can the TLV9151IDBVR be used as a direct pin-for-pin replacement for the TLC251ACD?

A: No. The TLC251ACD uses an 8-SOIC package, while the TLV9151IDBVR uses a SOT-23-5 package. These packages have different pin counts and physical dimensions. PCB layout redesign is required. Functional pin mapping must be performed during circuit redesign.

Q2: What is the minimum supply voltage requirement for the TLV9151IDBVR?

A: The TLV9151IDBVR requires a minimum supply voltage of 2.7 V. The TLC251ACD operates at a minimum of 1.4 V. If your application requires operation below 2.7 V, the TLV9151IDBVR is not compatible.

Q3: Does the TLV9151IDBVR provide rail-to-rail output capability?

A: Yes. The TLV9151IDBVR features rail-to-rail output, whereas the TLC251ACD does not. This allows the output signal to swing closer to the supply rails, providing increased output voltage swing in applications requiring maximum dynamic range.

Q4: What are the key performance improvements of the TLV9151IDBVR over the TLC251ACD?

A: The TLV9151IDBVR provides: (1) higher slew rate (20 V/µs versus 5.3 V/µs), enabling faster signal transitions; (2) higher gain bandwidth product (4.5 MHz versus 2.2 MHz), supporting higher-frequency applications; (3) lower input offset voltage (125 µV versus 900 µV), reducing DC error; (4) lower supply current (560 µA versus 950 µA), reducing power consumption.

Q5: Are both devices RoHS compliant?

A: Yes. Both the TLC251ACD and TLV9151IDBVR are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for equivalent component substitution.

Q6: What is the product status difference between these devices?

A: The TLC251ACD is designated Last Time Buy, indicating end-of-life production. The TLV9151IDBVR is in Active production status, ensuring continued availability and supply chain support for new designs and long-term product support.

Q7: Can the TLV9151IDBVR operate at the same temperature range as the TLC251ACD?

A: The TLV9151IDBVR supports an extended temperature range of -40°C to 125°C, which encompasses the TLC251ACD operating range of 0°C to 70°C. The TLV9151IDBVR is compatible with applications within the TLC251ACD temperature range and extends compatibility to lower and higher temperatures.

Q8: What design considerations are required when substituting the TLV9151IDBVR for the TLC251ACD?

A: Primary considerations include: (1) package change from 8-SOIC to SOT-23-5 requires PCB layout modification; (2) minimum supply voltage increase from 1.4 V to 2.7 V must be verified for circuit compatibility; (3) pin configuration differs and must be remapped in the schematic; (4) performance improvements (higher bandwidth, lower offset) may require circuit tuning or compensation adjustments in existing designs.