TL071CPSR Equivalent & Substitute Parts

Part Overview

The TL071CPSR is a J-FET input operational amplifier manufactured by Texas Instruments, housed in an 8-SO surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TL071CPSR serves applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier designs. Due to its Last Time Buy status, identification of functionally equivalent substitute components is necessary for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	1	—
Slew Rate	13	V/µs
Gain Bandwidth Product	3	MHz
Current - Input Bias	65	pA
Voltage - Input Offset	3	mV
Current - Supply	1.4	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	0 to 70	°C
Mounting Type	Surface Mount	—
Package / Case	8-SOIC (0.209", 5.30mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TL071CPSR is determined by strict alignment of electrical and mechanical parameters. The critical substitution criteria are:

Electrical Compatibility Requirements:

Amplifier Type: J-FET (maintains input impedance and bias current characteristics)
Number of Circuits: 1 (single amplifier configuration)
Voltage Supply Span: Minimum 10V to 30V maximum (operational range overlap)
Operating Temperature: 0°C to 70°C (commercial grade operation)
Package Type: 8-SOIC surface mount (PCB layout compatibility)

Secondary Electrical Parameters:

Slew Rate: 13V/µs or higher (signal fidelity preservation)
Gain Bandwidth Product: 3 MHz or higher (frequency response capability)
Input Bias Current: 65 pA or lower (circuit loading minimization)
Input Offset Voltage: 3 mV or lower (DC accuracy maintenance)
Supply Current: 1.4 mA or lower (power consumption consistency)

Compliance Requirements:

RoHS3 Compliant status preferred for regulatory alignment
Moisture Sensitivity Level 1 (Unlimited) for handling consistency

Substitute parts are grouped into two categories: Direct Substitutes (identical or superior electrical performance with active product status) and Functional Equivalents (compatible electrical parameters with alternative product status or manufacturer).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (mA)	Supply Span Min (V)	Supply Span Max (V)	Temp Range (°C)	Package	Status
TL071CPSR	Texas Instruments	J-FET	13	3	65	3	1.4	10	30	0 to 70	8-SOIC (5.30mm)	Last Time Buy
TL071CDR	Texas Instruments	J-FET	13	5.25	65	3	1.4	10	30	0 to 70	8-SOIC (3.90mm)	Active
TL071CDT	STMicroelectronics	J-FET	16	4	20	3	1.4	6	36	0 to 70	8-SOIC (3.90mm)	Active
TL071IDT	STMicroelectronics	J-FET	16	4	20	3	1.4	6	36	-40 to 105	8-SOIC (3.90mm)	Active
TL071ACDT	STMicroelectronics	J-FET	16	4	20	3	1.4	6	36	0 to 70	8-SOIC (3.90mm)	Active
TL071BCD	Texas Instruments	J-FET	13	5.25	65	2	1.4	10	30	0 to 70	8-SOIC (3.90mm)	Obsolete
TL081BCD	Texas Instruments	J-FET	13	3	30	2	1.4	7	36	0 to 70	8-SOIC (3.90mm)	Obsolete
TL081CDT	STMicroelectronics	J-FET	16	4	20	3	1.4	6	36	0 to 70	8-SOIC (3.90mm)	Active
TL071CD	onsemi	J-FET	16	5.25	20	3	1.4	6	36	0 to 70	8-SOIC (3.90mm)	Obsolete
LF356MX/NOPB	Texas Instruments	J-FET	12	5	30	3	5	30	30	0 to 70	8-SOIC (3.90mm)	Active
MC33171DT	STMicroelectronics	General Purpose	2	2.1	20000	1	0.22	4	44	-40 to 105	8-SOIC (3.90mm)	Active

Engineering Selection Recommendations

Primary Substitute (Recommended for Direct Replacement):

TL071CDR (Texas Instruments) is the primary recommended substitute. This part maintains identical electrical specifications to the TL071CPSR with the exception of enhanced Gain Bandwidth Product (5.25 MHz versus 3 MHz). The TL071CDR is manufactured by the original equipment manufacturer, carries Active product status with substantial inventory availability (90,400 units), and maintains full RoHS3 compliance and MSL 1 rating. The package footprint differs (3.90mm versus 5.30mm width), requiring PCB layout verification but offering improved density. Supply voltage range remains 10V to 30V with identical operating temperature range (0°C to 70°C).

Secondary Substitutes (Functional Equivalents with Enhanced Performance):

TL071CDT and TL071ACDT (STMicroelectronics) provide superior electrical performance with 16V/µs slew rate and 4 MHz gain bandwidth product. Both maintain J-FET amplifier topology with identical input offset voltage (3 mV) and supply current (1.4 mA). These parts expand the supply voltage range to 6V minimum and 36V maximum, providing broader operational flexibility. TL071ACDT offers extended temperature range (-40°C to 105°C) for industrial applications. Both carry Active status with substantial inventory.

TL081CDT (STMicroelectronics) provides equivalent performance to TL071CDT with identical electrical specifications and Active product status. This part represents an alternative sourcing option within the same performance tier.

Alternative Consideration (Limited Substitution):

LF356MX/NOPB (Texas Instruments) is a BI-FET series amplifier with J-FET input characteristics. This part exhibits reduced input bias current (30 pA versus 65 pA) but requires elevated supply current (5 mA versus 1.4 mA). The supply voltage specification differs (fixed 30V span), limiting applicability to designs with specific power supply constraints. This part is suitable only for applications where the reduced input bias current provides measurable benefit and elevated supply current is acceptable.

Not Recommended:

MC33171DT (STMicroelectronics) is a General Purpose amplifier, not a J-FET device. Input bias current (20 nA) and slew rate (2V/µs) differ substantially from the TL071CPSR specification. This part is unsuitable for direct substitution.

TL071BCD, TL081BCD, and TL071CD carry Obsolete product status, presenting long-term supply risk despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can TL071CDR directly replace TL071CPSR on existing PCBs?

A: Electrical substitution is direct. The package footprint differs: TL071CDR uses 8-SOIC with 3.90mm width versus TL071CPSR at 5.30mm width. PCB layout verification is required. If the PCB pad pattern accommodates the narrower package, no design changes are necessary. If not, a new PCB layout is required.

Q: What is the significance of the Gain Bandwidth Product difference between TL071CPSR (3 MHz) and TL071CDR (5.25 MHz)?

A: Higher Gain Bandwidth Product indicates greater frequency response capability. TL071CDR provides superior high-frequency performance without compromising DC characteristics. For applications operating below 3 MHz, this difference is not functionally significant. For applications approaching or exceeding 3 MHz, TL071CDR offers improved stability margin.

Q: Why is LF356MX/NOPB listed as a substitute if the supply current is significantly higher?

A: LF356MX/NOPB is listed based on manufacturer cross-reference data provided in the input parameters. However, the 5 mA supply current (versus 1.4 mA for TL071CPSR) represents a 3.6x increase. This part is suitable only for applications where power consumption is not constrained and the reduced input bias current (30 pA) provides specific circuit benefit.

Q: What is the difference between TL071CDT and TL071ACDT?

A: Both parts are manufactured by STMicroelectronics with identical electrical specifications. The primary difference is operating temperature range: TL071CDT operates 0°C to 70°C (commercial grade), while TL071ACDT operates -40°C to 105°C (industrial grade). Select TL071ACDT for applications requiring extended temperature operation.

Q: Is MC33171DT a valid substitute?

A: MC33171DT is not a valid substitute. This is a General Purpose amplifier with fundamentally different electrical characteristics: input bias current of 20 nanoamperes (versus 65 picoamperes for TL071CPSR) and slew rate of 2V/µs (versus 13V/µs). The amplifier topology differs, making this part unsuitable for direct replacement.

Q: What does "Last Time Buy" status mean for the TL071CPSR?

A: Last Time Buy indicates that Texas Instruments has discontinued production and will not manufacture additional units beyond current inventory. Existing stock (1,602 units) represents the final available supply. Design migration to an Active product is necessary for long-term production continuity.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended substitutes (TL071CDR, TL071CDT, TL071ACDT, TL081CDT) carry RoHS3 Compliant status. TL071CD (onsemi) is RoHS non-compliant and Obsolete, making it unsuitable for new designs. Verify RoHS compliance requirements for your application before final part selection.

Q: What is Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the component's sensitivity to moisture absorption during storage and handling. MSL 1 (Unlimited) means the part has no moisture sensitivity restrictions and requires no special storage conditions. All recommended substitutes carry MSL 1 rating, ensuring handling compatibility with existing supply chain processes.

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