RC4580ID Audio Amplifier 2 Circuit 8-SOIC Equivalent & Substitute Parts

Part Overview

The RC4580ID is a dual-channel audio amplifier integrated circuit manufactured by Texas Instruments in 8-SOIC surface mount packaging. This part is classified as Last Time Buy, indicating discontinued production with limited remaining inventory (2177 pcs). The RC4580ID serves applications requiring low-noise audio signal amplification with dual independent circuits in a compact form factor.

Equivalent and substitute parts are necessary due to the Last Time Buy status of the RC4580ID. Organizations requiring continued supply of dual-channel audio amplifiers in 8-SOIC packaging must identify functionally compatible alternatives from active product lines to ensure long-term design sustainability and procurement reliability.

Key Parameters

Parameter	RC4580ID Value	Unit	Substitution Relevance
Amplifier Type	Audio	—	Critical
Number of Circuits	2	Channels	Critical
Slew Rate	5	V/µs	High
Gain Bandwidth Product	12	MHz	High
Current - Input Bias	100	nA	Medium
Voltage - Input Offset	500	µV	Medium
Current - Supply	6	mA	Medium
Current - Output / Channel	50	mA	High
Voltage - Supply Span (Min)	4	V	Critical
Voltage - Supply Span (Max)	32	V	Critical
Operating Temperature	-40 to 85	°C	High
Package / Case	8-SOIC (0.154", 3.90mm)	—	Critical
Mounting Type	Surface Mount	—	Critical
RoHS Status	ROHS3 Compliant	—	High

Substitute Part Grouping Explanation

Substitution logic for the RC4580ID is based on strict alignment of electrical and mechanical parameters. The following criteria determine valid substitutes:

Critical Parameters (Must Match or Exceed):

Dual-channel configuration (2 circuits minimum)
8-SOIC surface mount package (0.154", 3.90mm width)
Supply voltage range: 4V to 32V minimum
Audio amplifier classification

High-Priority Parameters (Should Match or Exceed):

Slew rate ≥ 5V/µs
Gain bandwidth product ≥ 12 MHz
Output current per channel ≥ 50 mA
Operating temperature range including -40°C to 85°C
RoHS3 compliance

Medium-Priority Parameters (Acceptable Variation):

Input bias current: 100 nA to 500 nA range acceptable
Input offset voltage: 300 µV to 500 µV range acceptable
Supply current: 5 mA to 7 mA range acceptable

Substitutes are grouped by amplifier type (Audio, General Purpose, J-FET) and packaging format. Parts meeting all critical parameters and most high-priority parameters are classified as direct substitutes. Parts with acceptable parameter variations are classified as functional alternatives.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
RC4580ID	Texas Instruments	Audio	5	12	100	50	4	32	-40 to 85	8-SOIC	Last Time Buy
RC4580IDR	Texas Instruments	Audio	5	12	100	50	4	32	-40 to 85	8-SOIC	Active
LM833M	National Semiconductor	Audio	7	15	500	40	10	30	-40 to 85	8-SOIC	Active
LM833MX/NOPB	Texas Instruments	Audio	7	15	500	40	10	30	-40 to 85	8-SOIC	Active
AD746JRZ	Analog Devices Inc.	J-FET	75	13	0.11	25	9	36	0 to 70	8-SOIC	Active
AS358AMTR-E1	Diodes Incorporated	General Purpose	—	—	20	40	3	36	-40 to 85	8-SOIC	Active
AS358AMTR-G1	Diodes Incorporated	General Purpose	—	—	20	40	3	36	-40 to 85	8-SOIC	Active
BA15218F-E2	Rohm Semiconductor	General Purpose	3	10	50	50	4	32	-40 to 85	8-SOIC	Active
BA4580RF-E2	Rohm Semiconductor	General Purpose	5	5	100	50	4	32	-40 to 105	8-SOIC	Active
LF253DT	STMicroelectronics	J-FET	16	4	0.02	40	6	36	-40 to 105	8-SOIC	Active
LF353DT	STMicroelectronics	J-FET	16	4	0.02	40	6	36	0 to 70	8-SOIC	Active

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Identical Electrical Performance):

RC4580IDR is the primary direct substitute. This part maintains identical electrical specifications to RC4580ID (5V/µs slew rate, 12 MHz gain bandwidth product, 50 mA output current per channel, 4V to 32V supply range, -40°C to 85°C operating temperature). The only difference is packaging format: RC4580IDR is supplied in Cut Tape and Digi-Reel format versus tube packaging for RC4580ID. Both are Texas Instruments products with ROHS3 compliance and unlimited moisture sensitivity rating. RC4580IDR has significantly higher inventory availability (226,800 pcs) and Active product status, making it the recommended primary choice for new designs and long-term procurement.

Tier 2 - Functional Alternatives (Audio Amplifier Category, Minor Parameter Variations):

LM833MX/NOPB and LM833M are audio amplifiers with enhanced performance characteristics. Both feature 7V/µs slew rate and 15 MHz gain bandwidth product, exceeding RC4580ID specifications. Output current per channel is 40 mA (versus 50 mA for RC4580ID). Supply voltage minimum is 10V (versus 4V for RC4580ID), which may limit applicability in low-voltage designs. Both maintain -40°C to 85°C operating temperature range and ROHS3 compliance. LM833MX/NOPB is Texas Instruments product with 50,200 pcs inventory and Active status. These parts are suitable for applications where minimum 10V supply voltage is acceptable and enhanced bandwidth is beneficial.

Tier 3 - Specialized Alternatives (J-FET Amplifiers, Different Electrical Characteristics):

AD746JRZ, LF253DT, and LF353DT are J-FET input amplifiers offering ultra-low input bias current (110 pA to 20 pA range) compared to RC4580ID (100 nA). These parts are suitable for high-impedance input applications. AD746JRZ features 75V/µs slew rate and 13 MHz gain bandwidth product with 9V to 36V supply range. Operating temperature range is 0°C to 70°C (narrower than RC4580ID). LF253DT and LF353DT feature 16V/µs slew rate but lower 4 MHz gain bandwidth product. LF253DT supports -40°C to 105°C temperature range; LF353DT supports 0°C to 70°C. These J-FET alternatives are appropriate only when low input bias current is a design requirement.

Tier 4 - General Purpose Alternatives (Broader Application Range, Parameter Trade-offs):

AS358AMTR-E1, AS358AMTR-G1, BA15218F-E2, and BA4580RF-E2 are general-purpose operational amplifiers with dual channels in 8-SOIC packaging. These parts offer wider supply voltage ranges (3V to 36V) but with varying performance trade-offs. AS358 series parts lack specified slew rate and gain bandwidth product data. BA15218F-E2 features 3V/µs slew rate and 10 MHz gain bandwidth product. BA4580RF-E2 matches RC4580ID slew rate (5V/µs) but offers only 5 MHz gain bandwidth product. BA4580RF-E2 extends operating temperature to -40°C to 105°C. These general-purpose alternatives are suitable for non-audio applications or designs with relaxed bandwidth requirements.

Compliance and Certification Status:

All recommended substitutes maintain ROHS3 compliance and REACH Unaffected status, matching RC4580ID regulatory requirements. Moisture sensitivity levels are MSL 1 (Unlimited) for all primary recommendations, ensuring compatibility with standard handling and storage procedures.

Frequently Asked Questions (FAQ)

Q1: Can RC4580IDR be used as a direct replacement for RC4580ID in existing designs?

A: Yes. RC4580IDR is electrically identical to RC4580ID with matching specifications across all critical parameters: 5V/µs slew rate, 12 MHz gain bandwidth product, 50 mA output current per channel, 4V to 32V supply range, and -40°C to 85°C operating temperature. The only difference is packaging format (tape and reel versus tube). PCB layout and circuit design require no modification. RC4580IDR is the recommended substitute due to Active product status and higher inventory availability.

Q2: What is the key difference between audio amplifier substitutes (LM833 series) and the RC4580ID?

A: LM833 series parts offer enhanced performance with 7V/µs slew rate and 15 MHz gain bandwidth product compared to RC4580ID specifications (5V/µs and 12 MHz). However, LM833 series requires minimum 10V supply voltage, whereas RC4580ID operates from 4V minimum. LM833 series output current is 40 mA per channel versus 50 mA for RC4580ID. LM833 series is suitable for applications where 10V minimum supply voltage is acceptable and enhanced bandwidth is beneficial.

Q3: When should J-FET amplifiers (AD746JRZ, LF253DT, LF353DT) be considered as substitutes?

A: J-FET amplifiers are appropriate only when ultra-low input bias current is a design requirement. AD746JRZ features 110 pA input bias current; LF253DT and LF353DT feature 20 pA input bias current. These compare to RC4580ID at 100 nA. J-FET alternatives are not recommended for general audio applications where RC4580ID input bias current is acceptable, as they introduce different frequency response characteristics and narrower operating temperature ranges in some cases.

Q4: Are general-purpose amplifiers (AS358, BA15218F-E2, BA4580RF-E2) suitable audio amplifier substitutes?

A: General-purpose amplifiers are not recommended as primary audio amplifier substitutes for RC4580ID. These parts lack audio-specific optimization and have reduced or unspecified gain bandwidth product and slew rate specifications. AS358 series parts lack specified slew rate data. BA15218F-E2 features only 3V/µs slew rate and 10 MHz gain bandwidth product. BA4580RF-E2 features only 5 MHz gain bandwidth product. General-purpose alternatives are suitable only for non-audio applications or designs with relaxed bandwidth requirements.

Q5: What packaging considerations apply when substituting RC4580ID?

A: RC4580ID is supplied in tube packaging (8-SOIC, 0.154" width, 3.90mm). RC4580IDR is supplied in cut tape and Digi-Reel format. Both use identical 8-SOIC surface mount package with 0.154" width and 3.90mm body width. BA15218F-E2 and BA4580RF-E2 use 8-SOP package with 0.173" width and 4.40mm body width, which is mechanically incompatible with RC4580ID PCB layouts. All other substitutes use standard 8-SOIC package compatible with RC4580ID footprints. Verify PCB footprint compatibility before design implementation.

Q6: How does operating temperature range affect substitute selection?

A: RC4580ID operates from -40°C to 85°C. RC4580IDR, LM833 series, AS358 series, and BA15218F-E2 maintain identical -40°C to 85°C range. BA4580RF-E2 extends to -40°C to 105°C. AD746JRZ and LF353DT narrow to 0°C to 70°C. LF253DT extends to -40°C to 105°C. For applications requiring full -40°C to 85°C range, select from RC4580IDR, LM833 series, AS358 series, or BA15218F-E2. For extended high-temperature operation to 105°C, select BA4580RF-E2 or LF253DT.

Q7: What is the inventory and product status significance for long-term procurement?

A: RC4580ID is Last Time Buy status with 2177 pcs remaining inventory. This indicates production discontinuation with no future availability. RC4580IDR is Active status with 226,800 pcs inventory, ensuring long-term procurement reliability. For new designs or designs requiring extended production runs, RC4580IDR is the only viable long-term substitute. Designs locked to RC4580ID tube packaging must transition to RC4580IDR tape and reel format or implement alternative substitutes before RC4580ID inventory depletion.

Q8: Are there supply voltage compatibility issues when substituting RC4580ID?

A: RC4580ID operates from 4V to 32V supply range. RC4580IDR maintains identical 4V to 32V range. LM833 series requires 10V to 30V minimum, incompatible with 4V to 9V designs. AD746JRZ requires 9V to 36V, incompatible with 4V to 8V designs. AS358 series operates from 3V to 36V, compatible with all RC4580ID supply ranges. BA15218F-E2 operates from 4V to 32V, identical to RC4580ID. BA4580RF-E2 operates from 4V to 32V, identical to RC4580ID. LF253DT and LF353DT require 6V to 36V, incompatible with 4V to 5V designs. Verify minimum supply voltage requirements before substitute selection.

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