PCF8575CDB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
PCF8575CDB is a 16-bit I2C and SMBus I/O expander with interrupt output from Texas Instruments. It features 16 quasi-bidirectional I/O lines, 400kHz fast-mode I2C interface, and programmable address. From $1.40, in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- PCF8575CDB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.4000(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16-bit quasi-bidirectional I/O expansion over 2-wire I2C/SMBus interface, reducing GPIO pin requirements
- Supports fast-mode I2C at up to 400kHz clock frequency for high-speed data transfer
- Hardware interrupt output enables efficient event-driven I/O monitoring without continuous polling
- Three hardware address pins allow up to 8 devices on the same I2C bus
- 24-pin SSOP package with low standby current, ideal for space-constrained designs
Applications
The PCF8575CDB is widely used in industrial and consumer electronics to expand microcontroller GPIO capacity. It is ideal for controlling LED displays, keypads, relay drivers, and sensor interfaces in embedded systems. Common applications include smart home controllers, industrial automation panels, medical devices, and communication equipment requiring remote I/O management.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Address Bus Width | 8 |
| Clock Frequency-Max | 0.4MHz |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Number of Bits | 16 |
| Number of I/O Lines | 16 |
| Number of Ports | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP24,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 0.2mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PCF8575CDB:
Frequently Asked Questions
What is the maximum I2C clock frequency supported by the PCF8575CDB?
The PCF8575CDB supports fast-mode I2C communication at a maximum clock frequency of 400kHz, making it compatible with standard and fast-mode I2C masters for reliable data transfer in embedded systems.
How many I/O lines does the PCF8575CDB provide and how are they organized?
The PCF8575CDB provides 16 quasi-bidirectional I/O lines organized into 2 ports of 8 bits each (P0 and P1). Each I/O pin can independently function as an input or output without additional configuration registers.
Can multiple PCF8575CDB devices share the same I2C bus?
Yes, the PCF8575CDB has three hardware address pins (A0, A1, A2) that allow up to 8 devices to coexist on a single I2C bus, enabling a system to control up to 128 I/O lines from a single bus.
What is the purpose of the interrupt output on the PCF8575CDB?
The active-low interrupt output (INT) signals the host microcontroller whenever an input state changes on any of the 16 I/O lines. This eliminates the need for continuous polling and allows efficient, event-driven system design.
What package type is the PCF8575CDB available in?
The PCF8575CDB is available in a 24-pin SSOP (Small Outline Shrink Package) format, suitable for space-constrained PCB layouts in portable and industrial applications.
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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+ | $2.1500 | $2.15 |
| 100+ | $1.6200 | $162.00 |
| 1000+ | $1.4000 | $1400.00 |
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