TLC251CP Equivalent & Substitute Parts

Part Overview

The TLC251CP is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-DIP through-hole package. This device is classified as a Last Time Buy product, indicating that it is no longer in active production. The TLC251CP operates within a supply voltage range of 1.4 V to 16 V and is suitable for applications requiring low input bias current and moderate bandwidth performance.

Due to its Last Time Buy status, identifying functionally equivalent substitute parts is essential for design continuity and long-term component availability. Substitute parts must maintain compatibility with the electrical specifications and application requirements of the original design while accommodating potential differences in packaging and performance characteristics.

Substiute Parts

TLC251CP

Texas InstrumentsIn Stock: 1507TLC251CP Datasheet

Current PartRFQ

TLV9151IDBVR

Texas InstrumentsIn Stock: 2372TLV9151IDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLC251CP is determined by the following critical parameters:

Functional Compatibility Criteria:

• Amplifier Type: General Purpose
• Number of Circuits: 1 circuit per package
• Supply Voltage Range: Minimum 1.4 V, Maximum 16 V
• Output Type: Standard output (non-rail-to-rail acceptable)

Performance Compatibility Criteria:

• Slew Rate: Minimum 5.3 V/µs
• Gain Bandwidth Product: Minimum 2.2 MHz
• Input Bias Current: Maximum 0.7 pA
• Input Offset Voltage: Maximum 1.1 mV
• Supply Current: Maximum 950 µA

Regulatory & Compliance Criteria:

• RoHS3 Compliance required
• REACH Unaffected status required

The TLV9151IDBVR qualifies as a manufacturer-recommended substitute because it meets or exceeds all functional and performance criteria. While the package format differs (SOT-23-5 surface mount versus 8-DIP through hole), the electrical specifications are superior, and regulatory compliance is maintained.

Parameter Comparison

Engineering Selection Recommendations

TLC251CP (Original Part): The TLC251CP is suitable for applications where through-hole mounting is required and the operating temperature range of 0°C to 70°C is acceptable. This part is ROHS3 compliant and REACH unaffected. However, as a Last Time Buy product, long-term availability is limited.

TLV9151IDBVR (Manufacturer-Recommended Substitute): The TLV9151IDBVR is an active product from Texas Instruments and is recommended as the primary substitute. It exceeds the electrical performance specifications of the TLC251CP across all measured parameters: higher slew rate (20 V/µs versus 5.3 V/µs), higher gain bandwidth product (4.5 MHz versus 2.2 MHz), lower input offset voltage (0.125 mV versus 1.1 mV), and lower supply current (560 µA versus 950 µA). The extended operating temperature range (-40°C to 125°C) provides greater flexibility for diverse applications.

The primary design consideration is the transition from through-hole (8-DIP) to surface-mount (SOT-23-5) packaging. This substitution requires PCB layout modification and may necessitate design validation depending on application-specific requirements. Both parts maintain ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the TLV9151IDBVR directly replace the TLC251CP without circuit modification?

A: Electrical substitution is valid; the TLV9151IDBVR meets or exceeds all functional specifications. However, packaging differs fundamentally: the TLC251CP uses through-hole 8-DIP mounting, while the TLV9151IDBVR uses surface-mount SOT-23-5. PCB layout and assembly process changes are required.

Q: What are the key performance improvements of the TLV9151IDBVR?

A: The TLV9151IDBVR provides superior performance in four areas: slew rate increases from 5.3 V/µs to 20 V/µs, gain bandwidth product increases from 2.2 MHz to 4.5 MHz, input offset voltage decreases from 1.1 mV to 0.125 mV, and supply current decreases from 950 µA to 560 µA. The operating temperature range also extends from 0–70°C to -40–125°C.

Q: Are there supply voltage compatibility concerns?

A: The TLV9151IDBVR has a higher minimum supply voltage (2.7 V versus 1.4 V). Applications operating below 2.7 V cannot use this substitute. Both parts support the maximum 16 V supply voltage.

Q: What is the significance of the Last Time Buy status for the TLC251CP?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the TLC251CP. Existing inventory will be depleted, and no future manufacturing runs are planned. Component sourcing for new designs should prioritize active alternatives such as the TLV9151IDBVR.

Q: Are both parts RoHS3 compliant?

A: Yes, both the TLC251CP and TLV9151IDBVR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the difference between standard output and rail-to-rail output?

A: The TLC251CP has standard output, while the TLV9151IDBVR has rail-to-rail output. Rail-to-rail output allows the amplifier to swing closer to the supply rails, providing greater output voltage range. This is an enhancement that does not restrict compatibility in most applications.