RC4580IDG4 Equivalent & Substitute Parts Reference

Part Overview

The RC4580IDG4 is a dual-channel audio operational amplifier manufactured by Texas Instruments in 8-SOIC surface mount packaging. This device is classified as obsolete, though 1084 pieces remain in current inventory. The RC4580IDG4 serves audio amplification applications requiring two independent circuits with moderate bandwidth and low input offset voltage. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs, production continuity, and long-term component availability assurance.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Audio	—
Number of Circuits	2	—
Slew Rate	5	V/µs
Gain Bandwidth Product	12	MHz
Current - Input Bias	100	nA
Voltage - Input Offset	500	µV
Current - Supply	6	mA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	32	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the RC4580IDG4 is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Dual-channel configuration (2 circuits minimum)
8-SOIC surface mount package with 0.154" (3.90mm) width
Operating temperature range encompassing -40°C to 85°C
Supply voltage span compatibility: 4V to 32V minimum
Output current per channel: 50 mA or greater
Input bias current: 100 nA or lower
Input offset voltage: 500 µV or lower

Secondary Compatibility Factors:

Slew rate: 5 V/µs or greater
Gain bandwidth product: 12 MHz or greater
Current supply: 6 mA or lower
RoHS3 compliance and MSL Level 1 rating

Substitute parts are grouped into three functional categories: Audio Amplifiers (LM833M, LM833MX/NOPB), J-FET Amplifiers (AD746JRZ, LF253DT, LF353DT), General Purpose Amplifiers (BA15218F-E2, BA4580RF-E2, LM358ADR2G, LM358DR2G), and Voltage Feedback Amplifiers (LT1355CS8). Each category maintains the dual-circuit topology and 8-SOIC packaging while offering varying performance characteristics suited to different application requirements.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Status
RC4580IDG4	Texas Instruments	Audio	5	12	100	500	6	50	4	32	-40 to 85	Obsolete
LM833M	National Semiconductor	Audio	7	15	500	300	5	40	10	30	-40 to 85	Active
LM833MX/NOPB	Texas Instruments	Audio	7	15	500	300	5	40	10	30	-40 to 85	Active
AD746JRZ	Analog Devices Inc.	J-FET	75	13	0.11	300	7	25	9	36	0 to 70	Active
BA15218F-E2	Rohm Semiconductor	General Purpose	3	10	50	500	5	50	4	32	-40 to 85	Active
BA4580RF-E2	Rohm Semiconductor	General Purpose	5	5	100	300	6	50	4	32	-40 to 105	Active
LF253DT	STMicroelectronics	J-FET	16	4	0.02	3000	1.4	40	6	36	-40 to 105	Active
LF353DT	STMicroelectronics	J-FET	16	4	0.02	3000	1.4	40	6	36	0 to 70	Active
LM358ADR2G	onsemi	General Purpose	—	1	45	2000	0.8	40	3	32	0 to 70	Active
LM358DR2G	onsemi	General Purpose	—	1	45	2000	0.8	40	3	32	0 to 70	Active
LT1355CS8	Analog Devices Inc.	Voltage Feedback	400	12	80	300	1	30	5	30	0 to 70	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The LM833MX/NOPB (Texas Instruments) and LM833M (National Semiconductor) are the preferred direct substitutes. Both maintain audio amplifier classification, dual-circuit topology, and 8-SOIC packaging. Operating temperature range (-40°C to 85°C) matches the RC4580IDG4 specification. Supply voltage span (10V to 30V) is narrower than the original but covers standard dual-supply audio applications. Both devices are active products with ROHS3 compliance and MSL Level 1 rating, ensuring long-term availability and regulatory compliance.

Secondary Substitutes (Conditional Compatibility):

The BA4580RF-E2 (Rohm Semiconductor) provides electrical parameter alignment with extended operating temperature (-40°C to 105°C). This general-purpose amplifier matches slew rate (5 V/µs), supply current (6 mA), and output current (50 mA) specifications. Supply voltage span (4V to 32V) exceeds the original specification. This device is suitable for applications where the narrower supply range of audio-specific alternatives is insufficient.

The BA15218F-E2 (Rohm Semiconductor) offers identical supply voltage span (4V to 32V) and output current (50 mA) with lower input bias current (50 nA). Reduced slew rate (3 V/µs) and gain bandwidth product (10 MHz) may limit high-frequency audio performance but are acceptable for standard audio applications.

Specialized Substitutes (Application-Specific):

The LT1355CS8 (Analog Devices Inc.) is a voltage feedback amplifier with exceptional slew rate (400 V/µs) and matching gain bandwidth product (12 MHz). This device is suitable for high-speed audio applications requiring superior transient response. Operating temperature range (0°C to 70°C) is narrower than the original. Supply voltage span (5V to 30V) and reduced output current per channel (30 mA) require circuit verification.

The AD746JRZ (Analog Devices Inc.) is a J-FET amplifier with ultra-low input bias current (0.11 pA) and high slew rate (75 V/µs). Operating temperature range (0°C to 70°C) and output current per channel (25 mA) are reduced compared to the RC4580IDG4. This device is appropriate for low-noise, high-impedance audio input stages.

The LF253DT and LF353DT (STMicroelectronics) are J-FET amplifiers with extremely low input bias current (0.02 pA) and extended supply voltage compatibility (6V to 36V). Reduced gain bandwidth product (4 MHz) and elevated input offset voltage (3 mV) limit applicability to moderate-bandwidth audio circuits. LF253DT supports extended temperature range (-40°C to 105°C); LF353DT is rated 0°C to 70°C.

Not Recommended:

The LM358ADR2G and LM358DR2G (onsemi) are general-purpose amplifiers with gain bandwidth product of only 1 MHz, insufficient for audio frequency response requirements. Input offset voltage (2 mV) and input bias current (45 nA) are acceptable, but bandwidth limitation makes these unsuitable for audio applications.

Frequently Asked Questions (FAQ)

Q: Can the LM833MX/NOPB directly replace the RC4580IDG4 in existing designs?

A: The LM833MX/NOPB maintains identical 8-SOIC packaging, dual-circuit topology, and operating temperature range. However, the minimum supply voltage requirement increases from 4V to 10V. Designs operating at supply voltages below 10V require circuit modification or alternative selection. Pin configuration and functional behavior are compatible for standard audio amplifier applications.

Q: What is the primary difference between audio amplifiers and general-purpose amplifiers in this list?

A: Audio amplifiers (LM833 series) are optimized for audio frequency bandwidth and low distortion characteristics. General-purpose amplifiers (BA4580RF-E2, LM358 series) offer broader supply voltage ranges and lower power consumption but may exhibit reduced audio performance. Selection depends on application bandwidth requirements and power budget constraints.

Q: Why do J-FET amplifiers (AD746JRZ, LF253DT, LF353DT) show lower output current per channel?

A: J-FET input stage topology inherently limits output drive capability compared to bipolar input stages. The AD746JRZ provides 25 mA per channel; LF253DT and LF353DT provide 40 mA per channel. Applications requiring 50 mA output current must use bipolar input amplifiers (LM833 series, BA4580RF-E2, BA15218F-E2) or add output buffer stages.

Q: Is the BA4580RF-E2 suitable for audio applications despite general-purpose classification?

A: Yes. The BA4580RF-E2 matches critical audio parameters: slew rate (5 V/µs), supply current (6 mA), output current (50 mA), and supply voltage span (4V to 32V). General-purpose classification indicates broader application suitability rather than audio unsuitability. Extended operating temperature (-40°C to 105°C) provides additional thermal margin.

Q: What does the narrower operating temperature range of AD746JRZ (0°C to 70°C) mean for industrial applications?

A: The RC4580IDG4 supports -40°C to 85°C; the AD746JRZ supports 0°C to 70°C. Industrial designs requiring operation below 0°C or above 70°C must use alternative substitutes. Consumer and commercial applications typically operate within 0°C to 70°C and are compatible with AD746JRZ.

Q: Can the LT1355CS8 be used in place of the RC4580IDG4 for all audio applications?

A: The LT1355CS8 is electrically compatible for most audio applications, with superior slew rate (400 V/µs) and matching gain bandwidth product (12 MHz). However, operating temperature range (0°C to 70°C) is narrower, and output current per channel (30 mA) is reduced. Applications requiring 50 mA output current or extended temperature range require verification or alternative selection.

Q: Why is the LM358 series not recommended despite active product status?

A: The LM358 series (LM358ADR2G, LM358DR2G) has gain bandwidth product of only 1 MHz, insufficient for audio frequency response. Audio applications typically require minimum 4 MHz to 12 MHz bandwidth. The LM358 is suitable for low-frequency control circuits and general instrumentation but not for audio signal processing.

Q: What packaging considerations apply when substituting the RC4580IDG4?

A: All recommended substitutes use 8-SOIC surface mount packaging with 0.154" (3.90mm) width, matching the RC4580IDG4 footprint. The BA15218F-E2 and BA4580RF-E2 use 8-SOP packaging with 0.173" (4.40mm) width, requiring PCB layout verification. Pin configuration and functional pinout are identical across all listed substitutes, enabling direct socket replacement.

Q: Are all substitute parts RoHS3 compliant and MSL Level 1 rated?

A: Yes. All active substitute parts listed are ROHS3 compliant and rated MSL Level 1 (Unlimited), matching the RC4580IDG4 environmental and regulatory specifications. This ensures compatibility with modern manufacturing processes and long-term supply chain reliability.

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