LF353DG4 Equivalent & Substitute Parts

Part Overview

The LF353DG4 is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a dual-channel (2 circuit) device in 8-SOIC surface mount packaging. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The LF353DG4 serves applications requiring low input bias current and stable operation across industrial temperature ranges. Obsolete status requires engineers to evaluate active alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Amplifier Type	J-FET	—
Number of Circuits	2	—
Slew Rate	13	V/µs
Gain Bandwidth Product	3	MHz
Current - Input Bias	50	pA
Voltage - Input Offset	5	mV
Current - Supply (x2 Channels)	3.6	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	7	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	0 to 70	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LF353DG4 is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitute relationships:

Primary Substitution Criteria:

Amplifier Type: J-FET input configuration
Number of Circuits: Dual-channel (2 circuits)
Package / Case: 8-SOIC form factor (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Slew Rate: 13 V/µs minimum
Gain Bandwidth Product: 3 MHz minimum
Current - Input Bias: 50 pA maximum
Voltage - Input Offset: 5 mV maximum
Current - Supply: 3.6 mA (x2 Channels) maximum
Current - Output / Channel: 40 mA minimum
Voltage - Supply Span: 7 V to 36 V operating range
Operating Temperature: 0°C to 70°C minimum coverage

Substitute Categories:

Category A - Direct J-FET Equivalents (Highest Compatibility): Parts maintaining J-FET amplifier type with identical or superior electrical specifications within the 8-SOIC package. These include LF353D, LF353DR, LF353M/NOPB, LF353MX/NOPB, and LF353DT.

Category B - Alternative Amplifier Types (Conditional Compatibility): Parts with different amplifier types (Audio, General Purpose) that meet or exceed the electrical parameter requirements but require application-level verification. These include LM833DT, NJM4558E-TE2, OP275GSZ variants.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Supply Span (V)	Temp Range (°C)	Status	RoHS
LF353DG4	Texas Instruments	J-FET	13	3	50	5	3.6	40	7–36	0–70	Obsolete	ROHS3
LF353D	onsemi	J-FET	13	3	50	5	3.6	40	7–36	0–70	Obsolete	Non-compliant
LF353DR	Texas Instruments	J-FET	13	3	50	5	3.6	40	7–36	0–70	Active	ROHS3
LF353M/NOPB	Texas Instruments	J-FET	13	4	50	5	3.6	—	10–36	0–70	Active	ROHS3
LF353MX/NOPB	Texas Instruments	J-FET	13	4	50	5	3.6	—	10–36	0–70	Active	ROHS3
LF353DT	STMicroelectronics	J-FET	16	4	20	3	1.4	40	6–36	0–70	Active	ROHS3
LM833DT	STMicroelectronics	Audio	7	15	300	0.3	4	37	5–30	−40–105	Active	ROHS3
NJM4558E-TE2	Nisshinbo Micro Devices Inc.	General Purpose	1	3	25	0.5	3.5	—	8–36	−40–85	Active	—
OP275GSZ	Analog Devices Inc.	Audio	22	9	100	1	4	90	9–44	−40–85	Active	ROHS3
OP275GSZ-REEL	Analog Devices Inc.	Audio	22	9	100	1	4	90	9–44	−40–85	Active	ROHS3
OP275GSZ-REEL7	Analog Devices Inc.	Audio	22	9	100	1	4	90	9–44	−40–85	Active	ROHS3

Engineering Selection Recommendations

Tier 1 - Recommended Direct Substitutes (Active Status, ROHS3 Compliant):

LF353DR and LF353MX/NOPB are the primary recommended substitutes. Both are manufactured by Texas Instruments, maintain active product status, and carry ROHS3 compliance certification. LF353DR provides identical electrical specifications to the LF353DG4 with superior supply chain availability (65,300 units in stock). LF353MX/NOPB offers enhanced gain bandwidth product (4 MHz versus 3 MHz) with active status and substantial inventory (17,700 units).

Tier 2 - Enhanced Performance Alternatives (Active Status, ROHS3 Compliant):

LF353DT (STMicroelectronics) delivers superior electrical performance with reduced input bias current (20 pA), lower input offset voltage (3 mV), and reduced supply current (1.4 mA). This device maintains J-FET amplifier type and 8-SOIC packaging with active product status and ROHS3 compliance. The lower minimum supply voltage (6 V) expands application flexibility.

Tier 3 - Conditional Alternatives (Different Amplifier Type):

OP275GSZ variants (Analog Devices Inc.) provide audio amplifier functionality with superior slew rate (22 V/µs) and gain bandwidth product (9 MHz). These devices are active, ROHS3 compliant, and widely available. Selection requires verification that audio amplifier characteristics meet application requirements. Supply voltage range extends to 44 V maximum.

Not Recommended:

LF353D (onsemi) is obsolete and RoHS non-compliant, offering no advantage over active alternatives. NJM4558E-TE2 exhibits significantly reduced slew rate (1 V/µs), incompatible with the LF353DG4 performance envelope. LM833DT operates at reduced maximum supply voltage (30 V) and exhibits higher input bias current (300 nA), limiting compatibility.

Frequently Asked Questions (FAQ)

Q1: Can LF353DR directly replace LF353DG4 without circuit modification?

LF353DR maintains identical electrical specifications (slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current, and supply voltage range) and identical 8-SOIC packaging. Direct substitution is supported without circuit modification. LF353DR is active and ROHS3 compliant, addressing obsolescence of the LF353DG4.

Q2: What is the difference between LF353MX/NOPB and LF353DR?

Both are Texas Instruments J-FET dual operational amplifiers in 8-SOIC packaging with active status and ROHS3 compliance. LF353MX/NOPB provides enhanced gain bandwidth product (4 MHz versus 3 MHz) and requires minimum supply voltage of 10 V (versus 7 V for LF353DR). Selection depends on application bandwidth requirements and minimum supply voltage constraints.

Q3: Why is LF353DT listed as a substitute despite different electrical specifications?

LF353DT maintains J-FET amplifier type and 8-SOIC packaging with active status and ROHS3 compliance. It delivers superior electrical performance: higher slew rate (16 V/µs), lower input bias current (20 pA), and reduced supply current (1.4 mA). These enhancements make LF353DT suitable for applications where the LF353DG4 specifications represent minimum requirements rather than exact targets.

Q4: Are OP275GSZ variants suitable for direct replacement?

OP275GSZ variants are audio amplifiers, not J-FET input devices. They do not maintain identical amplifier type classification. However, they meet or exceed all electrical parameter requirements and maintain 8-SOIC packaging. Selection requires application-level verification that audio amplifier characteristics (different input impedance, noise characteristics, and frequency response) are compatible with the intended circuit function.

Q5: What packaging options are available for substitute parts?

All substitute parts maintain 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical compatibility. Packaging variants differ in tape/reel configuration: Cut Tape (CT) & Digi-Reel®, Tube, or Tape & Reel (TR). Selection depends on procurement volume and assembly process requirements, not electrical compatibility.

Q6: Which substitute offers the best supply chain availability?

LF353DR (Texas Instruments) provides the highest inventory level at 65,300 units in stock. OP275GSZ-REEL7 (Analog Devices Inc.) offers 19,764 units. Both represent active products with established supply chains suitable for production deployment.

Q7: Are all recommended substitutes RoHS compliant?

Tier 1 and Tier 2 recommended substitutes (LF353DR, LF353MX/NOPB, LF353DT) carry ROHS3 compliance certification. OP275GSZ variants also maintain ROHS3 compliance. NJM4558E-TE2 does not specify RoHS status in provided data. Compliance verification is required for applications subject to RoHS regulatory requirements.

Q8: What is the operating temperature range coverage for substitutes?

LF353DR, LF353MX/NOPB, and LF353DT maintain the LF353DG4 operating range (0°C to 70°C). OP275GSZ variants and NJM4558E-TE2 extend coverage to −40°C to 85°C or −40°C to 105°C, supporting wider temperature applications. Selection depends on application thermal requirements.

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