Alternatives to Texas Instruments OPA655U
Texas Instruments OPA655U and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 OPA655UTexas Instruments | OPA656UTexas Instruments |  OPA657UTexas Instruments | +4more | |
|---|---|---|---|---|
| FFF Compatibility | Matches the SOIC-8 footprint, but the original OPA655U uses dual power supply connections on pins 4/5 (-VS) and 7/8 (+VS), while the OPA656U only uses pin 4 (-VS) and pin 7 (+VS), leaving pins 5 and 8 as No Connect (NC).Both parts are packaged in a standard 8-pin SOIC package with identical physical body dimensions.Directly matches critical AC specifications (295 V/µs slew rate, ~240 MHz bandwidth) and meets voltage supply range requirements. | Matches the SOIC-8 footprint, but pins 5 and 8 are NC on the OPA657U, unlike the original OPA655U which uses pins 5 and 8 as redundant supply pins.Both parts are in standard 8-pin SOIC packages.The OPA657U is a decompensated operational amplifier stable only for closed-loop gains of 7 V/V or greater, unlike the unity-gain stable OPA655U. | ||
 AI Summary | OPA655U by Texas Instruments: Voltage Feedback Amplifier 1 Circuit 8-SOIC. | The OPA656U is the direct successor recommended by Texas Instruments for replacing the OPA655U. It achieves nearly identical high-speed AC performance and slew rate, with significantly improved DC precision and lower quiescent current. Note that the OPA656U is also obsolete but remains widely available from authorized aftermarket distributors like Rochester Electronics.
| The OPA657U is an active, high-speed sibling in the OPA65x family that offers a massive speed boost but is decompensated. It is only suitable for applications where the closed-loop circuit gain is 7 V/V or greater, or where external compensation is added.
| |
| Lifecycle Status | Obsolete | Obsolete | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Voltage Feedback Amplifier 1 Circuit 8-SOIC | Voltage Feedback Amplifier 1 Circuit 8-SOIC | Voltage Feedback Amplifier 1 Circuit 8-SOIC | |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | |
| Type | Linear | Linear | Linear | |
| Datasheet | Open | Open | N/A | |
| Lead Time | Unknown | 18 weeks | 6 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.33.0001 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Slew Rate | 295V/µs | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Amplifier Type | Voltage Feedback | - | - | |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | - | - | |
| Current - Supply | 25mA | - | - | |
| Number of Circuits | 1 | - | - | |
| Current - Input Bias | 5 pA | - | - | |
| Operating Temperature | -40°C ~ 85°C | - | - |
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Frequently asked questions
Yes. The Texas Instruments OPA655U is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the Texas Instruments OPA655U are the OPA656U (Texas Instruments) and the OPA657U (Texas Instruments), out of 6 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the OPA655U are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The OPA655U (Texas Instruments) is a part in the Linear category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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