TS271IDT Equivalent & Substitute Parts

Part Overview

The TS271IDT is a general-purpose operational amplifier manufactured by STMicroelectronics, housed in an 8-SOIC surface mount package. This single-circuit linear amplifier operates across a supply voltage range of 3V to 16V and maintains functionality over an extended temperature range of -40°C to 125°C. The device is currently in active product status with 5012 units in stock.

Substitute parts are necessary when the TS271IDT becomes unavailable, when alternative packaging formats are required, or when design specifications demand different electrical performance characteristics within the general-purpose amplifier category.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	-
Number of Circuits	1	-
Package / Case	8-SOIC (0.154", 3.90mm Width)	-
Mounting Type	Surface Mount	-
Slew Rate	0.04	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	1.1	mV
Current - Supply	10	µA
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	-40°C ~ 125°C	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the TS271IDT is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility.

Electrical Performance Envelope: Substitute parts must operate within the supply voltage range of 3V to 16V minimum. Parts with minimum supply voltage requirements exceeding 3V or maximum supply voltage below 16V have restricted compatibility.

Amplifier Classification: All substitutes must be single-circuit general-purpose operational amplifiers to maintain functional equivalence.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating to ensure manufacturing and storage compatibility.

Temperature Operating Range: Substitutes with narrower operating temperature ranges (0°C to 70°C) are suitable for applications not requiring the full -40°C to 125°C range of the TS271IDT.

The following Texas Instruments parts meet these substitution criteria: TLC251ACD, TLC251CD, TLC251CDG4, TLC2654AC-8D, TLC2654I-8D, and TLC2654I-8DR.

Parameter Comparison

Parameter	TS271IDT	TLC251ACD	TLC251CD	TLC251CDG4	TLC2654AC-8D	TLC2654I-8D	TLC2654I-8DR
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.04	5.3	5.3	5.3	3.7	3.7	3.7
Gain Bandwidth Product (kHz)	100	2200	2200	2200	1900	1900	1900
Current - Input Bias (pA)	1	0.7	0.7	0.7	50	50	50
Voltage - Input Offset (mV)	1.1	0.9	1.1	1.1	0.004	0.005	0.005
Current - Supply (µA)	10	950	950	950	1500	1500	1500
Current - Output / Channel (mA)	45	-	-	-	50	50	50
Voltage - Supply Span (Min)	3 V	1.4 V	1.4 V	1.4 V	4.6 V	4.6 V	4.6 V
Voltage - Supply Span (Max)	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Operating Temperature	-40°C ~ 125°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Active	Last Time Buy	Last Time Buy	Discontinued at DiGi Electronics	Active	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

TLC2654I-8DR is the primary substitute for new designs. This part maintains active product status, operates across the extended temperature range of -40°C to 85°C, and is available in Tape & Reel packaging suitable for automated assembly. The TLC2654I-8DR provides higher output current capability (50 mA) and superior input offset voltage performance (5 µV) compared to the TS271IDT.

TLC2654AC-8D serves as an alternative when commercial temperature range (0°C to 70°C) is acceptable. This part is currently active and available in Tube packaging. It offers identical electrical performance to the TLC2654I-8D variant with the exception of operating temperature range.

TLC251CD and TLC251ACD are suitable substitutes when applications require lower supply current consumption (950 µA versus 10 µA for TS271IDT) and can operate within the 0°C to 70°C temperature range. Both parts are in Last Time Buy status, indicating limited future availability.

TLC251CDG4 is not recommended for new designs due to discontinued status at DiGi Electronics, despite meeting all electrical and package requirements.

Applications requiring the full -40°C to 125°C operating temperature range of the TS271IDT should prioritize TLC2654I-8DR, as it extends the upper temperature limit to 85°C while maintaining the lower -40°C threshold.

Frequently Asked Questions (FAQ)

Q: Can TLC251CD directly replace TS271IDT in existing designs?

A: TLC251CD is electrically compatible and uses the identical 8-SOIC package. However, it operates only within 0°C to 70°C, which is narrower than the TS271IDT range of -40°C to 125°C. Substitution is valid only for applications not requiring operation below 0°C or above 70°C.

Q: What is the primary difference between TLC2654I-8D and TLC2654I-8DR?

A: Both parts are electrically identical. The difference is packaging format: TLC2654I-8D is supplied in Tube packaging, while TLC2654I-8DR is supplied in Tape & Reel format. Selection depends on assembly process requirements and volume.

Q: Why does TLC2654AC-8D have a higher minimum supply voltage (4.6V) than TS271IDT (3V)?

A: The TLC2654 series has a different internal design that requires a minimum of 4.6V for proper operation. Applications designed for 3V to 4.5V supply voltages cannot use TLC2654 variants and must use TLC251 or TS271 series instead.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the TS271IDT compliance profile.

Q: Which substitute part has the best input offset voltage performance?

A: TLC2654AC-8D and TLC2654I-8D/8DR offer the lowest input offset voltage at 4-5 µV, compared to 1.1 mV for TS271IDT. TLC251ACD provides 0.9 mV offset voltage.

Q: Is TLC251CDG4 available for new orders?

A: No. TLC251CDG4 is discontinued at DiGi Electronics and should not be selected for new designs. Use TLC251CD or TLC2654I-8DR instead.

Q: What is the inventory status of substitute parts?

A: TLC251ACD has 2100 units in stock, TLC251CD has 1393 units, TLC251CDG4 has 872 units, TLC2654AC-8D has 896 units, TLC2654I-8D has 1469 units, and TLC2654I-8DR has 909 units available.

Q: Can I use TLC2654I-8DR in applications requiring -40°C to 125°C operation?

A: TLC2654I-8DR operates from -40°C to 85°C, which covers the lower temperature extreme but not the upper limit of 125°C. For full -40°C to 125°C range, the TS271IDT remains the only option among these parts.

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