LS204IN Equivalent & Substitute Parts

Part Overview

The LS204IN is a general-purpose operational amplifier manufactured by STMicroelectronics, configured as a dual-channel (2 circuit) device in an 8-Mini DIP package. This component is classified as obsolete, indicating that it is no longer in active production. Finding equivalent and substitute parts is necessary to support legacy system maintenance, design updates, and procurement continuity for applications currently utilizing the LS204IN.

The LS204IN operates across a wide supply voltage range (6V to 30V) with a slew rate of 1.5V/µs and a gain bandwidth product of 3 MHz, making it suitable for general-purpose analog signal processing applications.

Key Parameters

Parameter	LS204IN Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Package / Case	8-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
Slew Rate	1.5	V/µs
Gain Bandwidth Product	3	MHz
Current - Input Bias	50	nA
Voltage - Input Offset	500	µV
Current - Supply	700	µA
Current - Output / Channel	23	mA
Voltage - Supply Span (Min)	6	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40°C ~ 105°C	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LS204IN is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Dual-channel configuration (2 circuits)
8-DIP through-hole package (0.300", 7.62mm)
Supply voltage range compatibility (minimum 6V, maximum 30V or higher)
General-purpose amplifier classification
RoHS3 compliance

Performance Parameters for Functional Equivalence:

Slew rate (1.5V/µs baseline)
Gain bandwidth product (3 MHz baseline)
Input bias current (50 nA baseline)
Input offset voltage (500 µV baseline)
Output current per channel (23 mA baseline)
Operating temperature range (-40°C to 105°C baseline)

Substitute parts are grouped into two categories based on amplifier type and performance characteristics:

Category A: General-Purpose Amplifiers (Direct Functional Substitutes) Parts with general-purpose amplifier classification and compatible electrical parameters: AD708JNZ, LM1458N/NOPB, LM258P

Category B: Enhanced-Performance Amplifiers (Functional Alternatives) Parts with superior performance characteristics or different amplifier types (J-FET, audio) that maintain package and circuit count compatibility: TL082BCP, TL082CP/NOPB, NJM4556AD, MUSES01

Parameter Comparison

Parameter	LS204IN	AD708JNZ	LM1458N/NOPB	LM258P	TL082BCP	TL082CP/NOPB	NJM4556AD	MUSES01
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	J-FET	J-FET	General Purpose	Audio
Number of Circuits	2	2	2	2	2	2	2	2
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Slew Rate (V/µs)	1.5	0.3	0.5	0.3	13	13	3	12
Gain Bandwidth Product (MHz)	3	0.9	1	0.7	3	4	8	3.3
Current - Input Bias (nA)	50	1	200	20	0.03 (pA)	0.05 (pA)	50	0.2 (pA)
Voltage - Input Offset (µV)	500	30	1000	3000	2000	5000	500	800
Current - Supply (µA)	700	4500	3000 (x2)	500 (x2)	1400 (x2)	3600 (x2)	8000	8500
Current - Output / Channel (mA)	23	—	—	40	10	17	70	25
Voltage - Supply Span (Min)	6 V	6 V	36 V	3 V	10 V	36 V	4 V	18 V
Voltage - Supply Span (Max)	30 V	36 V	36 V	32 V	30 V	36 V	36 V	32 V
Operating Temperature	-40°C ~ 105°C	0°C ~ 70°C	0°C ~ 70°C	-25°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Product Status, General-Purpose Classification):

LM258P is the recommended primary substitute for the LS204IN. This Texas Instruments general-purpose dual operational amplifier maintains full compatibility with the 8-DIP through-hole package and dual-circuit configuration. The LM258P is in active production status, ensuring long-term availability and supply chain stability. It operates across a supply voltage range of 3V to 32V, which encompasses the LS204IN operating range. The LM258P exhibits lower input bias current (20 nA) and reduced supply current (500 µA per channel) compared to the LS204IN, resulting in improved power efficiency. Operating temperature range of -25°C to 85°C covers the majority of industrial applications, though it does not extend to the full -40°C to 105°C range of the LS204IN.

AD708JNZ (Analog Devices Inc.) serves as an alternative general-purpose substitute with active product status. This device provides superior input offset voltage (30 µV) and extremely low input bias current (1 nA), making it suitable for precision applications. The AD708JNZ operates across 6V to 36V supply range and maintains the 8-DIP package format. However, the reduced slew rate (0.3V/µs) and lower gain bandwidth product (900 kHz) compared to the LS204IN may limit suitability for high-speed signal processing applications.

LM1458N/NOPB (Texas Instruments) is an active general-purpose dual operational amplifier in 8-DIP package. This part maintains compatibility with the LS204IN package and circuit count. The LM1458N/NOPB operates at a fixed 36V supply span, which differs from the LS204IN's variable 6V to 30V range. This fixed supply requirement may necessitate circuit redesign in applications utilizing variable supply voltages.

Secondary Substitutes (Enhanced Performance, Alternative Amplifier Types):

TL082BCP and TL082CP/NOPB (Texas Instruments) are J-FET input operational amplifiers offering significantly enhanced slew rate (13V/µs) and superior input bias current characteristics (30 pA and 50 pA respectively). These devices are suitable for applications requiring high-speed signal processing or extremely low input bias current. Both maintain active product status and 8-DIP package compatibility. The TL082BCP operates across 10V to 30V supply range, while TL082CP/NOPB operates at fixed 36V supply. J-FET input architecture differs fundamentally from the bipolar input design of the LS204IN, requiring circuit validation for offset voltage and temperature coefficient performance.

NJM4556AD (Nisshinbo Micro Devices Inc.) is classified as "Not For New Designs" and is therefore not recommended for new applications. This part is included for reference in legacy system support scenarios only. The NJM4556AD offers superior performance metrics including 3V/µs slew rate and 8 MHz gain bandwidth product, with extended operating temperature range (-40°C to 85°C) approaching the LS204IN specification.

MUSES01 (Nisshinbo Micro Devices Inc.) is an audio-grade dual operational amplifier with active product status. This device is optimized for audio signal processing applications with 12V/µs slew rate and 3.3 MHz gain bandwidth product. The MUSES01 operates across 18V to 32V supply range, which does not fully encompass the LS204IN's 6V minimum specification. Audio-grade classification indicates optimization for low-distortion, low-noise performance rather than general-purpose applications.

Compliance and Certification:

All recommended primary substitutes (LM258P, AD708JNZ, LM1458N/NOPB) maintain ROHS3 compliance and REACH unaffected status, matching the LS204IN regulatory classification. All parts are classified under ECCN EAR99 and HTSUS 8542.33.0001, ensuring consistent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can the LM258P directly replace the LS204IN without circuit modifications?

A: The LM258P is mechanically and functionally compatible with the LS204IN in terms of pinout, package format, and dual-circuit configuration. However, the operating temperature range differs (LM258P: -25°C to 85°C versus LS204IN: -40°C to 105°C). Applications requiring operation below -25°C or above 85°C require alternative substitutes or circuit redesign. Electrical performance differences (lower input bias current, reduced supply current) are generally beneficial and do not require circuit modifications in most applications.

Q: What is the difference between general-purpose and J-FET input amplifiers?

A: General-purpose amplifiers (such as LS204IN, LM258P, AD708JNZ) utilize bipolar input transistor stages, resulting in moderate input bias current (typically 1 nA to 200 nA) and moderate input offset voltage (30 µV to 3 mV). J-FET input amplifiers (TL082BCP, TL082CP/NOPB) utilize field-effect transistor input stages, providing extremely low input bias current (30 pA to 50 pA) and higher slew rates. J-FET devices are preferred for high-impedance signal sources and high-speed applications but exhibit different temperature coefficient and offset voltage characteristics requiring circuit validation.

Q: Why does the LM1458N/NOPB specify a fixed 36V supply span instead of a range?

A: The LM1458N/NOPB is designed for operation at a fixed ±18V dual supply configuration (total 36V span). This differs from the LS204IN, which operates across a variable single or dual supply range of 6V to 30V. Applications utilizing the LS204IN with variable supply voltages require either the LM258P (variable 3V to 32V range) or circuit redesign to accommodate fixed supply requirements.

Q: Is the MUSES01 suitable for general-purpose applications?

A: The MUSES01 is optimized for audio signal processing and is classified as an audio-grade amplifier. While it maintains dual-circuit 8-DIP package compatibility, its minimum supply voltage requirement (18V) exceeds the LS204IN's 6V minimum specification. The MUSES01 is recommended only for audio applications where its low-distortion, low-noise characteristics provide specific performance advantages. General-purpose applications should utilize LM258P, AD708JNZ, or LM1458N/NOPB.

Q: What is the significance of "Not For New Designs" product status?

A: Parts designated "Not For New Designs" (such as NJM4556AD) are in production but are not recommended for incorporation into new product designs. These parts are maintained in inventory for legacy system support and repair applications only. For new designs, active product status parts (LM258P, AD708JNZ, TL082BCP, MUSES01) ensure long-term availability, ongoing manufacturer support, and access to design documentation and technical resources.

Q: Can I use the TL082BCP in place of the LS204IN for all applications?

A: The TL082BCP offers superior performance in slew rate (13V/µs versus 1.5V/µs) and input bias current (30 pA versus 50 nA), making it suitable for high-speed and precision applications. However, the TL082BCP operates across 10V to 30V supply range, which does not accommodate the LS204IN's 6V minimum specification. Additionally, J-FET input architecture introduces different offset voltage temperature coefficients and requires circuit validation for applications sensitive to input offset voltage drift. The TL082BCP is recommended only for applications where its enhanced performance characteristics justify circuit redesign and validation.

Q: What packaging options are available for these substitute parts?

A: All substitute parts listed maintain the 8-DIP (0.300", 7.62mm) through-hole package format, ensuring mechanical compatibility with LS204IN PCB layouts. Packaging variants (Tube, Tray) affect handling and storage but do not alter electrical performance or pinout. All parts are available in through-hole mounting configuration suitable for conventional PCB assembly processes.

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