BA4558 Equivalent & Substitute Parts

Part Overview

The BA4558 is a general-purpose operational amplifier manufactured by Rohm Semiconductor, configured as a dual-channel (2 circuit) device in an 8-DIP through-hole package. This linear amplifier is classified as obsolete, with 5809 units currently in stock. The BA4558 operates across a wide supply voltage range (8V to 30V) and temperature range (-40°C to 85°C), making it suitable for general analog signal processing applications.

Due to its obsolete product status, equivalent and substitute parts are necessary for ongoing production support, design continuity, and long-term component availability. Substitute parts are selected based on matching electrical performance parameters, compatible packaging options, and active product status where available.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	1.2	V/µs
Gain Bandwidth Product	2	MHz
Current - Input Bias	60	nA
Voltage - Input Offset	500	µV
Current - Output / Channel	10	mA
Voltage - Supply Span (Min)	8	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	8-DIP (0.300", 7.62mm)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BA4558 are grouped into two primary categories based on packaging and product status:

Category 1: Direct Package Equivalent (Surface Mount Alternative) The BA4558F-E2 maintains identical electrical specifications (slew rate 1.2V/µs, gain bandwidth 2MHz, input bias 60nA, supply range 8V-30V) while offering surface-mount packaging (8-SOIC). This part is manufactured by the same supplier (Rohm Semiconductor) and carries active product status, making it the preferred direct substitute for new designs requiring surface-mount technology.

Category 2: Through-Hole Alternatives with Enhanced Performance Parts including NJM4558D, RC4558IP, RC4558P, and RC4559P maintain the 8-DIP through-hole package format compatible with the BA4558. These substitutes exhibit variations in electrical performance parameters:

NJM4558D: Improved slew rate (1V/µs), higher gain bandwidth (3MHz), lower input bias (25nA), and extended supply range (8V-36V)
RC4558IP and RC4558P: Increased slew rate (1.7V/µs), higher gain bandwidth (3MHz), higher input bias (150nA), and differential output configuration
RC4559P: Enhanced slew rate (2V/µs), higher gain bandwidth (4MHz), lower input bias (40nA), and higher input offset voltage (2mV)

Category 3: Performance-Enhanced Alternative (J-FET Technology) The TL082CP/NOPB represents a technology upgrade from standard bipolar to J-FET input architecture, delivering significantly improved input bias current (50pA versus 60nA), higher slew rate (13V/µs), and higher gain bandwidth (4MHz). This part requires symmetric supply voltage (±18V maximum, totaling 36V span) and is suitable for applications demanding ultra-low input bias current.

Substitution eligibility is determined by:

Matching dual-channel (2 circuit) configuration
Compatible 8-DIP through-hole or equivalent surface-mount package
Supply voltage range encompassing or exceeding the BA4558 minimum (8V) and maximum (30V) specifications
Operating temperature range covering or exceeding -40°C to 85°C
RoHS3 compliance and MSL rating compatibility

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	Gain BW (MHz)	Input Bias (nA)	Input Offset (µV)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
BA4558	Rohm Semiconductor	Obsolete	1.2	2	60	500	10	8	30	-40 to 85	8-DIP
BA4558F-E2	Rohm Semiconductor	Active	1.2	2	60	500	10	8	30	-40 to 85	8-SOIC
NJM4558D	Nisshinbo Micro Devices	Not For New Designs	1	3	25	500	—	8	36	-40 to 85	8-DIP
RC4558IP	Texas Instruments	Active	1.7	3	150	500	10	10	30	-40 to 85	8-DIP
RC4558P	Texas Instruments	Active	1.7	3	150	500	10	10	30	0 to 70	8-DIP
RC4559P	Texas Instruments	Active	2	4	40	2000	10	10	30	0 to 70	8-DIP
TL082CP/NOPB	Texas Instruments	Active	13	4	0.05	5000	17	36	36	0 to 70	8-DIP

Engineering Selection Recommendations

For Direct Replacement (Surface Mount Transition): Select BA4558F-E2 when transitioning from through-hole to surface-mount assembly. This part maintains identical electrical specifications and is manufactured by Rohm Semiconductor with active product status, ensuring long-term availability and supply chain continuity.

For Through-Hole Designs Requiring Active Product Status: RC4558IP and RC4558P are recommended for new through-hole designs. Both parts are manufactured by Texas Instruments with active product status. RC4558IP supports the full industrial temperature range (-40°C to 85°C), matching the BA4558 specification. RC4558P operates within the commercial temperature range (0°C to 70°C) and is suitable for non-industrial applications. Both parts feature improved slew rate (1.7V/µs) and gain bandwidth (3MHz) compared to the BA4558.

For Enhanced Performance Applications: RC4559P offers improved performance characteristics (2V/µs slew rate, 4MHz gain bandwidth) while maintaining active product status and through-hole 8-DIP packaging. This part is suitable for applications requiring faster signal processing within the 0°C to 70°C operating range.

For Ultra-Low Input Bias Current Requirements: TL082CP/NOPB provides J-FET input technology with dramatically reduced input bias current (50pA) and significantly higher slew rate (13V/µs). This part requires symmetric power supply configuration and operates within 0°C to 70°C temperature range. Selection is appropriate for precision instrumentation and high-impedance signal conditioning applications.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and MSL rating compatibility with the BA4558. Parts with active product status (BA4558F-E2, RC4558IP, RC4558P, RC4559P, TL082CP/NOPB) are preferred for new designs to ensure extended component availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can BA4558F-E2 be used as a direct replacement for BA4558 in existing through-hole PCB designs?

A: No. BA4558F-E2 uses surface-mount 8-SOIC packaging, which is incompatible with through-hole PCB footprints designed for 8-DIP packages. PCB redesign is required to accommodate the different package format. For through-hole designs, select RC4558IP or RC4558P instead.

Q: What is the primary difference between RC4558IP and RC4558P?

A: Both parts are electrically identical with matching slew rate (1.7V/µs) and gain bandwidth (3MHz). The primary difference is operating temperature range: RC4558IP supports -40°C to 85°C (industrial), while RC4558P operates within 0°C to 70°C (commercial). Select RC4558IP for applications requiring extended temperature range.

Q: Why does TL082CP/NOPB have a different supply voltage specification (36V fixed) compared to BA4558 (8V to 30V range)?

A: TL082CP/NOPB uses J-FET input technology requiring symmetric power supply configuration (±18V maximum). The 36V specification represents the total voltage span between positive and negative rails, not a variable range. This part is not suitable for single-supply or asymmetric supply applications.

Q: Is NJM4558D recommended for new designs?

A: No. NJM4558D carries "Not For New Designs" product status, indicating the manufacturer has discontinued active support. While electrically compatible with improved specifications (1V/µs slew rate, 3MHz gain bandwidth, 25nA input bias), this part should be avoided for new product development. Use RC4558IP or RC4559P instead.

Q: Can RC4559P replace BA4558 in all applications?

A: RC4559P is electrically compatible but exhibits higher input offset voltage (2mV versus 500µV) and operates within 0°C to 70°C temperature range. Applications sensitive to input offset voltage or requiring extended temperature range (-40°C to 85°C) should use RC4558IP instead. Verify input offset voltage tolerance before selection.

Q: What does "Differential" output type mean for RC4558IP and RC4558P?

A: Differential output configuration indicates the amplifier outputs are referenced to each other rather than to ground. This affects circuit design and biasing requirements. Verify circuit topology compatibility before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts (BA4558F-E2, RC4558IP, RC4558P, RC4559P, TL082CP/NOPB) maintain ROHS3 compliance, matching the BA4558 environmental certification status.

Q: Which substitute part offers the best performance upgrade?

A: TL082CP/NOPB provides the most significant performance enhancement with 13V/µs slew rate (versus 1.2V/µs), 4MHz gain bandwidth (versus 2MHz), and 50pA input bias current (versus 60nA). However, this part requires symmetric power supply and operates within commercial temperature range (0°C to 70°C). For industrial temperature range with performance improvement, select RC4559P (2V/µs slew rate, 4MHz gain bandwidth).

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