PCF8574PWRIn StockTexas Instruments
PCF8574PWR is an 8-bit I2C I/O expander by Texas Instruments in TSSOP-16 package, operating 2.5-6V, with interrupt output. From $0.85, 1-piece MOQ, ships worldwide.
- Manufacturer
- Texas Instruments
- Package
- TSSOP-16
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- PCF8574PWR Datasheet PDF
- Category
- interface-ics
- Price
- From $0.8539(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Applications
PCF8574PWR is widely used in industrial automation, home appliances, and IoT devices to expand microcontroller GPIO over I2C. It drives LEDs, keypads, relays, and LCD displays without consuming additional MCU pins. Ideal for space-constrained embedded designs needing remote I/O control.
Specifications
| supplyVoltageMin | 2.5V |
| supplyVoltageMax | 6V |
| interface | I2C |
| i2cSpeedMax | 400kHz |
| numberOfIOs | 8 |
| addressPins | 3 |
| operatingTempMin | -40°C |
| operatingTempMax | 85°C |
| supplyCurrentStandby | 10µA |
| Package | TSSOP-16 |
Compliance & Regulatory
| RoHS Status | Compliant |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PCF8574PWR:
Alternate I2C address range 0x38-0x3F, pin-compatible drop-in replacement
Frequently Asked Questions
What is the PCF8574PWR and what does it do?
The PCF8574PWR is an 8-bit remote I/O expander from Texas Instruments that communicates via the I2C bus. It provides 8 quasi-bidirectional I/O ports through a 2-wire interface, allowing microcontrollers to control up to 8 digital I/O lines using only 2 pins. It supports I2C speeds up to 400kHz and operates from 2.5V to 6V.
What package and pin count does the PCF8574PWR use?
PCF8574PWR uses the TSSOP-16 surface-mount package with 16 pins. The TSSOP-16 footprint offers a compact profile for space-constrained PCB designs. Pin functions include 8 I/O ports (P0-P7), 2 I2C lines (SDA/SCL), 3 address pins (A0-A2), an interrupt output (/INT), VCC, and GND.
How many PCF8574PWR devices can share one I2C bus?
Up to 8 PCF8574PWR devices can be connected on the same I2C bus. Each device is assigned a unique 3-bit hardware address via A0, A1, A2 pins (addresses 0x20 through 0x27), allowing a single MCU to control up to 64 additional GPIO lines over just 2 wires.
What are good alternatives to the PCF8574PWR?
Compatible alternatives include PCF8574APWR (alternate I2C address range 0x38-0x3F), PCA9534 (lower voltage 1.65-5.5V), and MCP23008 (1.8-5.5V). For 16-bit expansion consider PCF8575 or MCP23017. These are functionally equivalent or pin-compatible in most designs.
Is the PCF8574PWR RoHS compliant?
Yes, the PCF8574PWR is RoHS compliant and lead-free. Texas Instruments ships this part in green/RoHS packaging with a matte-tin lead finish on the TSSOP-16 package, compliant with EU RoHS Directive 2011/65/EU and its amendments.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.7600 | $2.76 |
| 10+ | $1.1200 | $11.20 |
| 50+ | $1.0100 | $50.50 |
| 1000+ | $0.9216 | $921.58 |
| 4000+ | $0.8710 | $3484.00 |
| 10000+ | $0.8539 | $8538.90 |
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