Alternatives to NXP PCF8574AT
NXP PCF8574AT and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 PCF8574ATNXP |  PCF8574ADWRTexas Instruments | PCF8574ADWTexas Instruments | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Matches the SOIC-16 pinout mapping perfectly with identical pin assignments.Both are standard wide SOIC-16 packages (10.30mm x 7.50mm) with the same land pattern.Matches all electrical ratings, 100 kHz maximum clock frequency, and quasi-bidirectional structure. | Pinouts match perfectly with no footprint modifications required.Both utilize the same wide 16-pin SOIC body dimensions.Identical electrical specifications, quasi-bidirectional interface, and interrupt pin function. | ||
 AI Summary | PCF8574AT by NXP: I/O Expander, 2.5V to 6V, 8bit, 40°C to 85°C, SOIC 16. | The PCF8574ADWR is an active, exact drop-in replacement for the obsolete PCF8574AT. It utilizes the same SOIC-16 wide package and matches the I2C address range (0x38 to 0x3F), eliminating the need for any hardware or firmware modifications. This part is widely available in Tape & Reel packaging.
| The PCF8574ADW is identical to the PCF8574ADWR but supplied in tubes instead of tape and reel. It offers an exact, risk-free drop-in replacement with identical electrical, physical, and address parameters. This is highly suitable for legacy designs and low-volume production runs.
| |
| Lifecycle Status | Obsolete | Active | Obsolete | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | I/O Expander, 2.5V to 6V, 8bit, 40°C to 85°C, SOIC 16 | I/O Expander 8 I2C 100 kHz 16-SOIC | I/O Expander 8 I2C 100 kHz 16-SOIC | |
| Manufacturer | NXP | Texas Instruments | Texas Instruments | |
| Type | Component | Interface | Interface | |
| Datasheet | Open | Open | Open | |
| Lead Time | 52 weeks | 16 weeks | 6 weeks | |
| Country of Origin | NL | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 85423990 | - | - | |
| Moisture Sensitivity Level | - | - | - | |
| MSL | MSL 2 - 1 year | - | - | |
| SVHC | No SVHC (17-Dec-2015) | - | - | |
| IC Function | 8bit I/O Expander | - | - | |
| No. of Pins | 16 | - | - | |
| IC Package Type | SOIC | - | - | |
| Supply Voltage Max | 6 | - | - | |
| Supply Voltage Min | 2.5 | - | - | |
| Operating Temperature Max | 85 | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 PCF8574AT/3_518NXP | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 PCF8523T/1,118NXP | In stock | Obsolete | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The NXP PCF8574AT 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 NXP PCF8574AT are the PCF8574ADWR (Texas Instruments) and the PCF8574ADW (Texas Instruments), out of 5 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 PCF8574AT 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 PCF8574AT (NXP) is a part in the Component category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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