Alternatives to Texas Instruments PCA9557PWR
Texas Instruments PCA9557PWR and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 PCA9557PWRTexas Instruments |  PCA9557PW,118NXP USA Inc. |  PI4IOE5V9557LEXDiodes Incorporated | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Both devices utilize the 16-pin TSSOP package and share the exact same pin assignments, making it a true drop-in physical replacement.The physical body dimensions and lead pitches are identical, allowing the use of the same PCB land pattern and stencil.Features identical electrical specs, including a 2.3V to 5.5V VCC range, 400 kHz clock frequency, and matching Power-On Reset (POR) behavior. | The 16-pin TSSOP package (designated L) matches the target package with identical pin assignments.Standard 16-TSSOP package outline dimensions (4.4mm width, 0.65mm pitch) are physically interchangeable.Provides identical 8-bit GPIO expansion capabilities, POR defaults, and registers operating up to 5.5V. | ||
 AI Summary | PCA9557PWR by Texas Instruments: I/O Expander 8 I2C, SMBus 400 kHz 16-TSSOP. | This is a high-confidence direct drop-in second-source replacement from NXP. It shares the identical pinout, registers, and timing characteristics, meaning no software or board redesign is required.
| Diodes Incorporated provides this device as a highly compatible alternative. It operates identically over the 2.3V to 5.5V VCC range and requires no software or physical board alterations.
| |
| Lifecycle Status | Active | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | I/O Expander 8 I2C, SMBus 400 kHz 16-TSSOP | I/O Expander 8 I2C, SMBus 400 kHz 16-TSSOP | I/O Expander 8 I2C 400 kHz 16-TSSOP | |
| Manufacturer | Texas Instruments | NXP USA Inc. | Diodes Incorporated | |
| Type | Interface | Interface | Interface | |
| Datasheet | Open | Open | Open | |
| Lead Time | 16 weeks | 30 weeks | 36 weeks | |
| Country of Origin | CN, MY, US | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Features | POR | - | - | |
| Interface | I2C, SMBus | - | - | |
| Output Type | Open Drain, Push-Pull | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Number of I/O | 8 | - | - | |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) | - | - | |
| Clock Frequency | 400 kHz | - | - | |
| Interrupt Output | No | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
| PCA9517ADPNXP | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
 PCA9515ADTexas Instruments | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
 PCA9546APW,112NXP | In stock | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Texas Instruments PCA9557PWR is active and in production. The parts listed here are qualified equivalents if you need a second source or better availability.
The closest qualified second sources for the Texas Instruments PCA9557PWR are the PCA9557PW,118 (NXP USA Inc.) and the PI4IOE5V9557LEX (Diodes Incorporated), out of 3 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 PCA9557PWR 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 PCA9557PWR (Texas Instruments) is a part in the Interface category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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