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Texas Instruments PCF8574APWRE4 — Interface & Transceivers

PCF8574APWRE4 I2C 8-bit I/O expander, 100 kHz, 20-TSSOP

MPNPCF8574APWRE4
End of Life

Texas Instruments PCF8574APWRE4, I2C 8-bit I/O expander, 100 kHz, 2.5V-6V supply, 1mA source / 25mA sink, 20-TSSOP, -40°C~85°C.

$1.0000Ref. price · indicative, final on quote
Texas Instruments PCF8574APWRE4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

PCF8574APWRE4 specifications
ParameterValue
Output typePush-Pull
MountingSurface Mount
Supply voltage2.5V ~ 6V
Current - output source (Sink)1mA, 25mA
Clock frequency100 kHz
InterfaceI²C
Operating temperature-40°C~85°C
PackageTape & Reel (TR)
FeaturesPOR
Number of i (O)8
Case20-TSSOP (0.173\", 4.40mm Width)
Interrupt outputYes

Product details

The PCF8574APWRE4: It provides eight push-pull I/O lines with an interrupt output, letting a host MCU monitor pin changes without polling the bus.

Output drive — 1 mA source, 25 mA sink

Each I/O pin can source 1 mA or sink 25 mA. The source side is light, so if you need to power an external load from the pin, budget a pull-up or a small driver.

Package and footprint — 20-TSSOP

Housed in a 20-TSSOP (4.40 mm wide, 0.173" pitch), surface-mount only. No thermal pad to worry about — this is a low-power part that stays cool.

Frequently asked questions

Is PCF8574APWRE4 obsolete or still active?

Buyers need to know if the part is still in production before designing in or ordering large quantities.

What is the supply voltage range for PCF8574APWRE4?

Designers must ensure the voltage matches their system; datasheet shows 2.5V to 6V.

Where can I buy PCF8574APWRE4 and what is the current price?

Sourcing buyers need immediate availability and pricing to complete a BOM.

What is the package type and pinout of PCF8574APWRE4?

Engineers need package dimensions and pin mapping for PCB layout and compatibility.

Can PCF8574APWRE4 replace PCF8574APWR or PCF8574?

Maintenance and sourcing need drop-in or near equivalent replacements to avoid redesign.

Does PCF8574APWRE4 support 3.3V logic and output?

Many modern designs run at 3.3V; part must be compatible with that logic level.