TLC251ACDR Equivalent & Substitute Parts

Part Overview

The TLC251ACDR is a general-purpose operational amplifier manufactured by Texas Instruments in the LinCMOS™ series. This single-circuit, 8-SOIC surface-mount device is designed for low-power analog signal processing applications. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs. Substitute parts must maintain functional compatibility across key electrical parameters including gain-bandwidth product, slew rate, input bias current, and supply voltage range while accommodating the 8-SOIC package format.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Slew Rate	5.3	V/µs
Gain Bandwidth Product	2.2	MHz
Current - Input Bias	0.7	pA
Voltage - Input Offset	900	µV
Current - Supply	950	µA
Voltage - Supply Span (Min)	1.4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC251ACDR is determined by compatibility across the following critical parameters: package format (8-SOIC), mounting type (surface mount), amplifier classification (general purpose, single circuit), supply voltage range, and functional performance metrics (slew rate, gain-bandwidth product, input bias current, and input offset voltage).

The substitute parts identified are grouped into two categories based on electrical performance alignment:

Category 1: Texas Instruments LinCMOS™ Series (Direct Manufacturer Substitutes)

TLC251CD: Maintains identical slew rate (5.3 V/µs) and gain-bandwidth product (2.2 MHz) with matching supply specifications. Product status is Last Time Buy, indicating continued availability with defined end-of-life timeline.

Category 2: STMicroelectronics TS271 Series (Functional Equivalents)

TS271CDT and TS271IDT: Provide general-purpose amplification in the same 8-SOIC package with active product status. These parts operate within the specified supply voltage range (3 V to 16 V maximum) and maintain the same operating temperature range (0°C to 70°C for TS271CDT; extended to -40°C to 125°C for TS271IDT). Performance characteristics differ in slew rate (0.04 V/µs) and gain-bandwidth product (100 kHz), reflecting lower-speed operation suitable for applications not requiring the higher bandwidth of the TLC251ACDR.

All substitute parts comply with RoHS3 and maintain MSL Level 1 classification.

Parameter Comparison

Parameter	TLC251ACDR (Main)	TLC251CD	TS271CDT	TS271IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics
Product Status	Obsolete	Last Time Buy	Active	Active
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1
Slew Rate (V/µs)	5.3	5.3	0.04	0.04
Gain Bandwidth Product (MHz)	2.2	2.2	0.1	0.1
Current - Input Bias (pA)	0.7	0.7	1	1
Voltage - Input Offset (mV)	0.9	1.1	1.1	1.1
Current - Supply (µA)	950	950	10	10
Voltage - Supply Span Min (V)	1.4	1.4	3	3
Voltage - Supply Span Max (V)	16	16	16	16
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	-40 to 125
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1	1	1	1

Engineering Selection Recommendations

For Direct Performance Equivalence: The TLC251CD is the primary substitute for the TLC251ACDR. Both parts are manufactured by Texas Instruments within the LinCMOS™ series and deliver identical electrical performance: 5.3 V/µs slew rate, 2.2 MHz gain-bandwidth product, and 950 µA supply current. The TLC251CD maintains the same supply voltage range (1.4 V to 16 V) and operating temperature specification (0°C to 70°C). The TLC251CD is classified as Last Time Buy, confirming continued availability with a defined procurement window. Both parts are ROHS3 compliant with MSL Level 1 rating.

For Extended Temperature Operation: The TS271IDT provides active product status with extended operating temperature range (-40°C to 125°C), accommodating applications requiring operation beyond the standard 0°C to 70°C specification. However, this substitution requires design verification for applications dependent on the higher slew rate and gain-bandwidth product of the TLC251ACDR, as the TS271IDT operates at 0.04 V/µs slew rate and 100 kHz gain-bandwidth product. The TS271IDT maintains the 8-SOIC package format and is ROHS3 compliant.

For Low-Power Applications: The TS271CDT and TS271IDT both operate at 10 µA supply current, representing a 95-fold reduction compared to the TLC251ACDR's 950 µA specification. This substitution is applicable only to designs where the reduced bandwidth (100 kHz versus 2.2 MHz) and slew rate (0.04 V/µs versus 5.3 V/µs) are compatible with system requirements. Both TS271 variants require minimum supply voltage of 3 V, compared to the TLC251ACDR's 1.4 V minimum.

All substitute parts maintain identical package dimensions (8-SOIC, 0.154" width, 3.90 mm) and surface-mount compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TLC251CD be used as a direct replacement for the TLC251ACDR in existing designs?

A: Yes. The TLC251CD provides electrical equivalence across all specified parameters: identical slew rate (5.3 V/µs), gain-bandwidth product (2.2 MHz), supply current (950 µA), and operating temperature range (0°C to 70°C). Both parts use the 8-SOIC package format with identical pinout and mechanical dimensions. No circuit modifications are required.

Q: What are the key differences between the TLC251CD and TS271 series substitutes?

A: The TLC251CD maintains the performance characteristics of the TLC251ACDR. The TS271CDT and TS271IDT operate at significantly lower bandwidth (100 kHz versus 2.2 MHz) and slew rate (0.04 V/µs versus 5.3 V/µs), with reduced supply current (10 µA versus 950 µA). The TS271 series requires minimum supply voltage of 3 V, whereas the TLC251ACDR operates from 1.4 V. The TS271IDT extends the operating temperature range to -40°C to 125°C.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. The TLC251CD, TS271CDT, and TS271IDT are all packaged in 8-SOIC format with identical mechanical dimensions (0.154" width, 3.90 mm). Surface-mount assembly compatibility is maintained across all parts.

Q: What is the product status of each substitute part?

A: The TLC251CD is classified as Last Time Buy, indicating continued availability with a defined end-of-life date. The TS271CDT and TS271IDT are both classified as Active, confirming ongoing production and long-term availability.

Q: Do all substitute parts meet RoHS3 compliance requirements?

A: Yes. The TLC251CD, TS271CDT, and TS271IDT are all ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the TLC251ACDR.

Q: Which substitute is appropriate for applications requiring operation below 3 V supply voltage?

A: Only the TLC251CD maintains the TLC251ACDR's minimum supply voltage specification of 1.4 V. The TS271 series (TS271CDT and TS271IDT) require minimum supply voltage of 3 V and are not suitable for sub-3 V applications.

Q: Can the TS271 series be used in high-speed signal processing applications?

A: No. The TS271 series operates at 100 kHz gain-bandwidth product and 0.04 V/µs slew rate, compared to the TLC251ACDR's 2.2 MHz and 5.3 V/µs specifications. The TS271 series is suitable only for low-frequency applications where reduced bandwidth is acceptable.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message