TLC251BCP Equivalent & Substitute Parts

Part Overview

The TLC251BCP is a general-purpose operational amplifier manufactured by Texas Instruments, housed in an 8-PDIP through-hole package. This device is classified as a Last Time Buy product, indicating discontinued production with limited remaining inventory. The TLC251BCP operates within a supply voltage range of 1.4 V to 16 V and is suitable for applications requiring low input bias current and low input offset voltage characteristics. Due to its Last Time Buy status, identifying equivalent and substitute parts is essential for design continuity and long-term component availability.

Substiute Parts

TLC251BCP

Texas InstrumentsIn Stock: 2102TLC251BCP Datasheet

Current PartRFQ

TLV9151IDBVR

Texas InstrumentsIn Stock: 2372TLV9151IDBVR Datasheet

MFR RecommendedRFQ

TLC251ACP

Texas InstrumentsIn Stock: 941TLC251ACP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLC251BCP are identified based on functional equivalence within the general-purpose operational amplifier category. The substitution logic is determined by the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: General Purpose
• Number of Circuits: 1
• Supply Voltage Range: Minimum 1.4 V, Maximum 16 V
• RoHS3 Compliance

Substitute Parts Identified:

1. TLC251ACP — Direct package equivalent with identical through-hole 8-PDIP configuration. Maintains LinCMOS™ series continuity. Electrical performance characteristics are equivalent to the main part. Last Time Buy status applies.

2. TLV9151IDBVR — Functional substitute with enhanced electrical performance. Operates across an extended temperature range (-40°C to 125°C) and features rail-to-rail output capability. Surface-mount SOT-23-5 package requires PCB redesign. Active product status ensures long-term availability.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs:

The TLC251ACP is the direct equivalent for through-hole applications. It maintains identical package geometry (8-PDIP), electrical performance characteristics, and LinCMOS™ series continuity with the TLC251BCP. Both devices share Last Time Buy status; however, TLC251ACP inventory (929 Pcs) provides a transition path for existing designs. Both parts are ROHS3 compliant and suitable for applications operating within 0°C to 70°C temperature range and 1.4 V to 16 V supply voltage range.

For New Designs or Surface-Mount Migration:

The TLV9151IDBVR is an active product offering extended operational temperature range (-40°C to 125°C), enhanced electrical performance (20 V/µs slew rate, 4.5 MHz gain bandwidth product), and rail-to-rail output capability. This device requires surface-mount PCB implementation (SOT-23-5 package) and operates with minimum supply voltage of 2.7 V. The TLV9151IDBVR is ROHS3 compliant and provides long-term component availability due to active product status.

Compliance Considerations:

All three devices are ROHS3 compliant and carry EAR99 ECCN classification. The TLC251BCP and TLC251ACP are not subject to moisture sensitivity requirements (MSL: Not Applicable). The TLV9151IDBVR carries MSL Level 1 (Unlimited) rating.

Frequently Asked Questions (FAQ)

Q: Can TLC251ACP directly replace TLC251BCP in existing designs?

A: Yes. The TLC251ACP is a direct equivalent with identical 8-PDIP package configuration, electrical performance specifications, and supply voltage range (1.4 V to 16 V). No PCB modifications are required. Both devices operate within 0°C to 70°C temperature range.

Q: What are the key differences between TLC251BCP and TLV9151IDBVR?

A: The primary differences are package type (8-PDIP through-hole versus SOT-23-5 surface-mount), operating temperature range (0°C to 70°C versus -40°C to 125°C), and electrical performance. The TLV9151IDBVR features higher slew rate (20 V/µs versus 5.3 V/µs), higher gain bandwidth product (4.5 MHz versus 2.2 MHz), and rail-to-rail output capability. The TLV9151IDBVR requires minimum supply voltage of 2.7 V compared to 1.4 V for TLC251BCP.

Q: Is the TLV9151IDBVR suitable for low-voltage applications below 2.7 V?

A: No. The TLV9151IDBVR minimum supply voltage is 2.7 V. For applications requiring operation below 2.7 V, the TLC251BCP or TLC251ACP must be used, as both support minimum supply voltage of 1.4 V.

Q: What is the impact of switching from through-hole to surface-mount packaging?

A: Switching to the TLV9151IDBVR (SOT-23-5 surface-mount) requires PCB redesign, updated assembly processes, and modified test procedures. However, this transition enables access to an active product with extended temperature range and enhanced performance specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The TLC251BCP, TLC251ACP, and TLV9151IDBVR are all ROHS3 compliant. All three devices carry EAR99 ECCN classification and are REACH unaffected.

Q: What is the significance of Last Time Buy status for TLC251BCP and TLC251ACP?

A: Last Time Buy status indicates that production has been discontinued. Existing inventory is available for purchase, but no future manufacturing is planned. For long-term component availability, migration to the active TLV9151IDBVR is recommended for new designs.

Q: How do input offset voltage specifications compare across the three devices?

A: The TLC251BCP specifies 390 µV input offset voltage, TLC251ACP specifies 900 µV, and TLV9151IDBVR specifies 125 µV. Applications requiring tighter input offset voltage tolerance should prioritize the TLV9151IDBVR.

Q: Can the TLC251ACP be used as a temporary substitute while transitioning to TLV9151IDBVR?

A: Yes. The TLC251ACP provides functional equivalence to the TLC251BCP for through-hole designs. It serves as an interim solution while PCB redesign for surface-mount implementation is completed. Both devices maintain identical electrical performance and package compatibility.