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TL4581P Equivalent & Substitute Parts Reference
Part Overview
The TL4581P is a dual-channel audio amplifier integrated circuit manufactured by Texas Instruments in 8-DIP through-hole packaging. This device is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing production support and design continuity. The TL4581P operates across a 10V to 30V supply range with dual audio amplification circuits, making it suitable for audio signal processing applications requiring moderate bandwidth and output current capabilities.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TL4581P |
| Manufacturer | Texas Instruments |
| Category | Linear, Amplifiers |
| Amplifier Type | Audio |
| Number of Circuits | 2 |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| Slew Rate | 9V/µs |
| Gain Bandwidth Product | 10 MHz |
| Voltage - Supply Span (Min) | 10 V |
| Voltage - Supply Span (Max) | 30 V |
| Operating Temperature | 0°C ~ 70°C |
| Current - Supply | 8mA (x2 Channels) |
| Current - Output / Channel | 38 mA |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the TL4581P is determined by the following critical parameters:
Package Compatibility: All substitute parts must use 8-DIP (0.300", 7.62mm) through-hole packaging to ensure direct PCB footprint compatibility without layout modifications.
Circuit Configuration: All substitutes must provide dual-channel (2 circuit) amplification to maintain functional equivalence.
Supply Voltage Range: Substitute parts must support the TL4581P operating range of 10V to 30V minimum. Parts with wider supply ranges (lower minimum or higher maximum) are acceptable as they provide extended operational flexibility.
Output Current: Substitute parts must deliver minimum 38 mA per channel to meet or exceed the TL4581P output current specification.
Amplifier Classification: The TL4581P is classified as an audio amplifier. Substitutes may be either audio-specific or general-purpose amplifiers, provided they meet the electrical parameter requirements.
Slew Rate and Bandwidth: The TL4581P specifies 9V/µs slew rate and 10 MHz gain bandwidth product. Substitute parts meeting or exceeding these values maintain signal fidelity for audio applications.
The four qualified substitute parts are: AS358P-E1, BA15218, MUSES02, and NJM4580D.
Parameter Comparison
| Parameter | TL4581P | AS358P-E1 | BA15218 | MUSES02 | NJM4580D |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Diodes Incorporated | Rohm Semiconductor | Nisshinbo Micro Devices | Nisshinbo Micro Devices |
| Number of Circuits | 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) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Slew Rate | 9V/µs | Not Specified | 3V/µs | 5V/µs | 5V/µs |
| Gain Bandwidth Product | 10 MHz | Not Specified | 10 MHz | 11 MHz | 15 MHz |
| Current - Input Bias | 200 nA | 20 nA | 50 nA | 100 nA | 100 nA |
| Voltage - Input Offset | 500 µV | 2 mV | 500 µV | 300 µV | 500 µV |
| Current - Supply | 8mA (x2 Channels) | 700µA (x2 Channels) | 5mA | 8mA | 6mA |
| Current - Output / Channel | 38 mA | 40 mA | 50 mA | 50 mA | 50 mA |
| Voltage - Supply Span (Min) | 10 V | 3 V | 4 V | 7 V | 4 V |
| Voltage - Supply Span (Max) | 30 V | 36 V | 32 V | 32 V | 36 V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Product Status | Obsolete | Active | Active | Active | Not For New Designs |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS Compliant | RoHS Compliant |
Engineering Selection Recommendations
AS358P-E1 (Diodes Incorporated): This substitute is actively manufactured and ROHS3 compliant. It provides superior input bias current performance (20 nA versus 200 nA) and exceeds output current requirements (40 mA). The extended supply voltage range (3V to 36V) accommodates the TL4581P 10V to 30V requirement. Slew rate is not specified; verify application requirements if high-frequency transient response is critical. This part is recommended for new designs requiring general-purpose amplification.
BA15218 (Rohm Semiconductor): This substitute is actively manufactured and ROHS3 compliant. It meets all electrical parameter requirements with 50 mA output current and 10 MHz bandwidth matching the TL4581P specification. The slew rate of 3V/µs is lower than the TL4581P; applications requiring higher slew rates should evaluate performance impact. Extended operating temperature range (-40°C to 85°C) exceeds the TL4581P specification. This part is suitable for cost-optimized designs where lower slew rate is acceptable.
MUSES02 (Nisshinbo Micro Devices Inc.): This substitute is actively manufactured and RoHS compliant. It is classified as an audio amplifier, matching the TL4581P functional category. It provides 50 mA output current and 11 MHz gain bandwidth product, both exceeding TL4581P specifications. The 5V/µs slew rate is lower than the TL4581P. The minimum supply voltage of 7V is within the TL4581P 10V to 30V range. This part is recommended for audio-specific applications requiring active component availability.
NJM4580D (Nisshinbo Micro Devices Inc.): This substitute is classified as "Not For New Designs" and is RoHS compliant. It is an audio amplifier matching the TL4581P functional category. It provides 50 mA output current and 15 MHz gain bandwidth product, exceeding TL4581P specifications. The 5V/µs slew rate is lower than the TL4581P. The extended supply range (4V to 36V) accommodates the TL4581P requirement. This part is suitable only for legacy system maintenance where component continuity is required; it is not recommended for new designs.
Primary Recommendation: AS358P-E1 or MUSES02 for active production. AS358P-E1 offers superior performance metrics and active manufacturing status. MUSES02 provides audio-specific classification and active availability.
Frequently Asked Questions (FAQ)
Q: Can AS358P-E1 directly replace TL4581P without PCB modifications?
A: Yes. Both parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging. Pin-to-pin compatibility is maintained for dual-channel amplifier configurations. No PCB layout changes are required.
Q: What is the significance of the TL4581P being obsolete?
A: Obsolete status indicates the manufacturer (Texas Instruments) has discontinued production and support. Substitute parts ensure design continuity and supply chain reliability for existing applications and new production runs.
Q: Does BA15218 lower slew rate (3V/µs versus 9V/µs) affect audio applications?
A: Slew rate determines the maximum rate of voltage change per unit time. Lower slew rate may introduce distortion in high-frequency audio signals or fast transient conditions. Evaluate application bandwidth requirements; if audio bandwidth is below 20 kHz with moderate transient content, BA15218 is acceptable.
Q: Why is NJM4580D marked "Not For New Designs"?
A: This status indicates the manufacturer is phasing out the product line. While functional and available in inventory, it is not recommended for new product development. Use only for legacy system repairs or maintenance.
Q: Are all substitutes RoHS compliant?
A: Yes. All four substitute parts carry RoHS or ROHS3 compliance certification, meeting environmental and hazardous substance restrictions equivalent to or exceeding the TL4581P ROHS3 status.
Q: What is the difference between audio amplifier and general-purpose amplifier classifications?
A: Audio amplifiers are optimized for audio frequency ranges (20 Hz to 20 kHz) with emphasis on low distortion and noise performance. General-purpose amplifiers provide broader frequency response and are suitable for multiple applications. Both classifications are functionally compatible with the TL4581P in audio applications.
Q: Can I use AS358P-E1 in a 5V supply circuit?
A: Yes. AS358P-E1 supports 3V to 36V supply range, which includes 5V operation. The TL4581P minimum 10V requirement is a design constraint of the original part; substitutes with lower minimum voltage provide additional flexibility.
Q: Which substitute offers the best inventory availability?
A: NJM5532DD provides the highest inventory (62,171 pieces). However, NJM5532DD is not listed as a qualified substitute due to parameter mismatches. Among qualified substitutes, AS358P-E1 has 67,400 pieces available, providing excellent supply security.
Q: Do all substitutes maintain the same pin configuration?
A: Yes. All substitutes use 8-DIP packaging with identical pin spacing (0.300", 7.62mm). Pin assignments for dual-channel amplifier operation are standardized across all qualified substitutes.
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