TDA7379, TDA7297, TDA7265, TDA7269A Audio Amplifier IC Cross-Reference: Find In-Stock Replacements

Bottom Line: The ST TDA-series audio power amplifier ICs — TDA7379, TDA7297/TDA7297SA, TDA7265, and TDA7269A — are proven Class AB dual-channel devices covering 11 W to 36 W per channel, operating from 8 V to 18 V supply rails (device-dependent), in MultiWatt through-hole packages. All four are legacy allocation parts increasingly difficult to purchase from mainstream distribution; when stock disappears, engineers need functional drop-in replacements with matched gain, package footprint, and standby/mute pin behavior. This guide cross-references each device against its closest equivalents, compares their key electrical ratings in a single table, and shows where to source verified stock today.

Why TDA Audio Amplifier ICs Are Hard to Find

STMicroelectronics introduced the TDA7xxx audio power amplifier family in the 1990s to serve car radios, mini hi-fi systems, and portable speaker applications. Decades later these ICs are still specified in service manuals, repair BOMs, and low-cost consumer audio designs — but ST has progressively moved manufacturing capacity to newer product lines. The result is episodic allocation: a part number shows Available in one quarter and "long lead time / last-time-buy" in the next.

Procurement engineers searching for TDA7379 equivalent, TDA7265 equivalent, or TDA7297 equivalent IC face a two-step problem: find any stock at all, then confirm the alternative will work in their specific circuit without schematic redesign. The cross-reference table below addresses both steps.

IC-by-IC Overview

TDA7379 — 36 W × 2 Dual BTL Car Audio Amplifier

The TDA7379 is a dual BTL (Bridge-Tied Load) power amplifier housed in a PowerDIP-20 package. In BTL mode it delivers up to 36 W per channel into a 4 Ω load from an 18 V supply — the highest output power in this family. Its standby and mute pins are active-low, and the device includes a built-in clip detector for automatic gain reduction.

Key specifications:

Output power (BTL, 4 Ω, 14.4 V): 2 × 22 W (music), 2 × 36 W (clip)
Supply voltage range: 8 V – 18 V
Quiescent current: 60 mA typical
THD at 1 W, 1 kHz: < 0.1%
Package: PowerDIP-20 (MultiWatt)

The TDA7379 is most commonly found in aftermarket car stereos and car radio head units manufactured between 2000 and 2015. Because BTL mode requires no output coupling capacitors, PCB space savings were a key selling point. Replacement candidates must also support BTL operation with the same pin-active-low standby/mute logic.

TDA7297 / TDA7297SA — 15 W × 2 Dual Stereo Amplifier

The TDA7297SA (and its predecessor TDA7297) is a dual stereo Class AB amplifier in a 15-pin MultiWatt package, delivering up to 15 W per channel into a 4 Ω load. The "SA" suffix denotes an updated silicon revision with improved EMI performance. Both variants share the same pinout and PCB footprint.

Key specifications:

Output power (4 Ω, 14.4 V): 2 × 15 W peak; 2 × 8 W continuous
Supply voltage range: 6 V – 18 V
Standby and mute: independent active-low pins
Built-in protection: short-circuit, thermal shutdown, load dump
Package: MultiWatt-15

The TDA7297/SA appears extensively in desktop multimedia speakers, TV audio boards, and budget home theater amplifier modules. Its wide supply range (6–18 V) makes it tolerant of unregulated SMPS rails, which is why it remained popular in cost-sensitive designs long after introduction.

TDA7265 — 25 W × 2 Dual Stereo Hi-Fi Amplifier

The TDA7265 occupies the mid-power tier: 25 W per channel (nominal) into a 8 Ω load, or up to 45 W peak into 4 Ω. It targets hi-fi stereo amplifiers and active bookshelf speakers where audio quality is a higher priority than raw power density. The device uses a MultiWatt-15 package identical in outline to the TDA7297.

Key specifications:

Output power (8 Ω, ±20 V): 2 × 25 W
Output power (4 Ω, ±18 V): 2 × 45 W peak
Supply voltage: ±10 V – ±25 V (split / dual supply)
Input impedance: 20 kΩ typical
THD at 1 W: < 0.03%
Package: MultiWatt-15

Note that the TDA7265 uses a split (bipolar) supply (e.g., ±20 V), whereas the TDA7297 and TDA7379 use a single-ended positive supply. This is the primary incompatibility barrier when cross-referencing across the family.

TDA7269A — 14 W × 2 Wide-Bandwidth Dual Amplifier

The TDA7269A is the bandwidth-optimized member of the group, specified to 22 kHz (–3 dB) with 30 dB of gain. It delivers 14 W per channel into 4 Ω from an 18 V single supply and shares the MultiWatt-15 package with the TDA7297.

Key specifications:

Output power (4 Ω, 18 V): 2 × 14 W
Supply voltage range: 6 V – 18 V
Bandwidth: 22 kHz (–3 dB)
Gain: 30 dB
Package: MultiWatt-15

The TDA7269A is often specified alongside the TDA7297 in consumer audio repair literature because their pinouts and supply requirements are nearly identical. When TDA7297 stock is exhausted, TDA7269A is typically the first alternative evaluated.

Cross-Reference Table

Part Number	Output Power (per ch)	Supply Voltage	Package	Supply Type	Closest Functional Replacement
TDA7379	22 W (14.4 V, 4 Ω) / 36 W peak	8 V – 18 V	PowerDIP-20	Single	TDA7388 (if available)
TDA7297	8 W cont. / 15 W peak (4 Ω)	6 V – 18 V	MultiWatt-15	Single	TDA7297SA, TDA7269A
TDA7297SA	8 W cont. / 15 W peak (4 Ω)	6 V – 18 V	MultiWatt-15	Single	TDA7297, TDA7269A
TDA7265	25 W (8 Ω) / 45 W peak (4 Ω)	±10 V – ±25 V	MultiWatt-15	Split (bipolar)	TDA7293 (higher power), TDA7295
TDA7269A	14 W (4 Ω, 18 V)	6 V – 18 V	MultiWatt-15	Single	TDA7297SA

Replacement compatibility notes:

TDA7297 ↔ TDA7297SA: direct drop-in; same pinout, same supply range, "SA" is a silicon revision only.
TDA7297 ↔ TDA7269A: nearly pin-compatible on a single-supply board; verify gain setting resistor values (TDA7269A is fixed 30 dB; TDA7297 gain is externally set).
TDA7265 → TDA7293/TDA7295: same split-supply topology and MultiWatt-15 package but higher minimum supply voltage (±10 V vs ±12 V for TDA7293); check transformer tap.
TDA7379 (BTL dual) has no exact single-IC drop-in at the same output power in the TDA72xx sub-family; TDA7388 (quad) is sometimes used in modified layouts.

Key Selection Parameters for TDA Equivalents

1. Supply Topology: Single-Ended vs Split (Bipolar)

This is the first compatibility gate. The TDA7379, TDA7297, TDA7297SA, and TDA7269A all operate from a single positive supply (6–18 V). The TDA7265 requires a split supply (e.g., ±12 V to ±25 V). Mixing these on the same board requires a power supply redesign and is almost never practical in a repair scenario.

2. Output Power and Load Impedance

Match the rated output power at the same load impedance (4 Ω vs 8 Ω) and supply voltage as your original circuit. A device rated 15 W at 4 Ω will produce less than 8 W into 8 Ω at the same voltage. Always check the datasheet power table at your actual Vcc and RL, not the headline peak spec.

3. Package and Thermal Interface

All five devices in this group use the MultiWatt-15 or PowerDIP-20 through-hole package with an exposed metal tab for heatsinking. Confirm:

Pin count and pitch match (15-pin vs 20-pin PCB pads)
Tab mounting hole position matches
Thermal interface material is present (the tab is electrically live on most variants)

4. Standby and Mute Pin Logic

TDA family devices use active-low standby and mute pins controlled by the host microcontroller or power sequencing circuit. Verify pull-up resistor values and the logic threshold specified in the datasheet before substituting a revision. Some "SA" suffix revisions adjusted the threshold voltage slightly.

5. Gain Configuration

The TDA7297 and TDA7297SA allow external gain setting via feedback resistors, while the TDA7269A has a fixed internal gain of 30 dB. If your replacement has a fixed gain that differs from the original circuit's configured gain, the output level and clipping behavior will change. Recalculate feedback network values accordingly.

6. Protection Features

All devices include thermal shutdown and short-circuit protection. The TDA7379 additionally provides a clip detector output pin that can drive an external LED or feed back to an automotive head-unit processor. Ensure your replacement's protection thresholds are compatible with your thermal design.

Selection Decision Guide

Use this decision tree when choosing a TDA audio amplifier or its replacement:

What is your supply topology?
- Single positive supply (e.g., 12 V car battery or AC adapter) → TDA7297SA, TDA7297, TDA7269A, or TDA7379
- Split bipolar supply (e.g., ±15 V from center-tapped transformer) → TDA7265, TDA7293, or TDA7295
What output power do you need per channel?
- < 15 W per channel (4 Ω, single supply) → TDA7297SA or TDA7269A
- 15–25 W per channel (single supply, BTL) → TDA7379
- 25–50 W per channel (split supply) → TDA7265
Is package footprint a hard constraint?
- Yes, MultiWatt-15 footprint → TDA7297SA, TDA7269A, TDA7265 (split supply)
- Yes, PowerDIP-20 footprint → TDA7379 only in this family
- No (new design) → choose based on power and supply requirements
Is gain externally configurable required?
- Yes → TDA7297SA (adjustable via feedback resistors)
- No / fixed gain acceptable → TDA7269A (30 dB fixed gain)

Where to Find In-Stock TDA Audio Amplifier ICs

These parts are increasingly unavailable through standard distribution channels. FindMyChip aggregates real-time inventory from 200+ verified distributors worldwide, including specialist Shenzhen-based component traders who hold bonded stock of legacy ST audio ICs. Our 5-point authentication process screens against counterfeits — a significant risk with high-demand legacy audio amplifiers.

To check current availability:

Search TDA7379 inventory — real-time stock from verified sources
Search TDA7297SA inventory — including SA and non-SA variants
Request a quote for your BOM — submit multiple part numbers for competitive pricing from 200+ distributors

For bulk orders or BOM-level sourcing across multiple TDA variants, our procurement team provides 24-hour response with verified datecode and country-of-origin documentation.

FAQ

What is the closest equivalent to the TDA7379?

The TDA7379 is a dual BTL amplifier in a 20-pin PowerDIP package delivering up to 36 W per channel from an 18 V single supply. No exact pin-compatible drop-in exists within the TDA72xx sub-family because most peers use the 15-pin MultiWatt package. The TDA7388 (quad channel) and TDA7386 (4 × 45 W) are sometimes used in modified board layouts for applications where BTL output power is the primary requirement. Confirm gate/mute logic levels before substituting.

Can I replace a TDA7297 with a TDA7269A?

In most single-supply audio boards, yes. Both devices use the MultiWatt-15 package, operate from 6–18 V, and have the same active-low standby/mute pin structure. The main difference is gain: TDA7297 gain is set externally by feedback resistors (allowing flexible configuration), while TDA7269A has a fixed internal gain of 30 dB. If the original board was configured for 30 dB, the TDA7269A is a near-direct replacement. If gain was set differently, adjust the feedback resistors accordingly.

What is the supply voltage difference between TDA7265 and TDA7297?

The TDA7297 uses a single-ended supply (6–18 V, e.g., +12 V), while the TDA7265 requires a split (bipolar) supply (±10 V to ±25 V, e.g., ±15 V from a center-tapped transformer). These topologies are electrically incompatible and cannot be interchanged without a power supply redesign. Do not attempt a cross-reference between these two devices for an in-circuit replacement.

Are TDA audio ICs still being manufactured?

STMicroelectronics has reduced active production of many TDA72xx variants. Current stock availability is primarily from distribution channel inventory, bonded warehouse stock, and spot market suppliers. Availability varies month to month. Engineers designing new products should evaluate whether successor devices (such as the TDA7803A or newer FDA-class amplifiers) better fit their roadmap, reserving TDA72xx variants for legacy repair and replacement applications.

How do I verify TDA audio ICs are genuine?

Counterfeit TDA7297, TDA7265, and TDA7379 ICs are common in the spot market, particularly from unknown online sellers. Verification steps include: (1) check date code consistency with manufacturer production history; (2) measure quiescent current under no-signal conditions — counterfeits often draw 2–5× the specified 40–60 mA; (3) verify thermal shutdown triggers at the datasheet temperature (150°C junction); (4) source from ERAI-registered distributors or platforms with documented authentication processes. FindMyChip's 5-point authentication covers all these checks for every shipment.

Conclusion

The TDA7379, TDA7297/SA, TDA7265, and TDA7269A remain the workhorses of legacy audio repair and cost-sensitive new designs — but their allocation status means procurement risk is real. Understanding which devices are pin-compatible (TDA7297 ↔ TDA7297SA ↔ TDA7269A on the same footprint) and which require a supply topology change (TDA7265 needs split supply; the others do not) is the critical first step before committing to a substitute.

For verified in-stock inventory across all five devices, search FindMyChip or submit a BOM quote request to receive competitive pricing from 200+ authenticated distributors within 24 hours.