PCF8575CDWR

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PCF8575CDWR

IC I/O EXPANDER I2C 16B 24SOIC

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Specifications

Supplier Texas Instruments,Rochester Electronics, LLC
Package Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus Active
NumberofI/O 16
Interface I²C, SMBus
InterruptOutput Yes
Features POR
OutputType Open Drain
Current-OutputSource/Sink 10mA, 25mA
ClockFrequency 400 kHz
Voltage-Supply 4.5V ~ 5.5V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 24-SOIC (0.295, 7.50mm Width)

Overview

Description

The PCF8575CDWR is a 16‑bit I/O expander for the I2C bus from NXP. It adds 16 quasi‑bidirectional I/O pins (P0…P15) organized as two 8‑bit ports, usable as inputs or outputs. The pins have weak pull‑ups and are driven low when written 0; writing 1 leaves the pin high via the internal pull‑up. Data is written/read over I2C in two bytes: one for P0–P7 and one for P8–P15.
Key features:
- I2C 2‑wire interface, standard/fast mode up to 400 kHz
- Base address starting at 0x20 with A0–A2 select, giving up to eight addresses (0x20–0x27)
- Interrupt output (INT) for change notification
- 2.5–6.0 V operation (typical microcontroller voltages)
- RoHS-compliant 16‑pin package variant (CDWR)
Use cases: expand GPIOs for LED driving, keypad scanning, sensors, or peripheral interfaces where extra I/O lines are needed without extra microcontroller pins.
In short: simple, cheap I/O expansion for I2C-enabled projects requiring 16 channels.

Features

Concise features of PCF8575CDWR (I2C 16-bit I/O expander):
- 16 bidirectional I/O lines (P0–P15) via I2C bus
- Quasi-bidirectional ports: drive low when bit = 0; release (high) when bit = 1
- 16-bit port data register for read/write (two-byte data word)
- I2C interface with standard/fast modes
- Address selectable via A0–A2 pins (up to 8 devices on the same bus)
- Supply voltage: typically 2.5 V to 6 V
- Industrial temperature range (typical): -40°C to 85°C
- Low standby/power consumption suitable for battery-powered apps
- RoHS-compliant packaging (CDWR variant)
Note: No separate direction register; bit value controls output vs. input behavior.

Package

PCF8575CDWR comes in a 24‑pin plastic Small-Outline package (SOIC-24); RoHS compliant and supplied in Tape & Reel.

Pinout

- Pin count: 40 pins (DIP/SOIC/TSSOP variant, PCF8575CDWR)
- Function: 16-bit I/O Expander for I2C-bus; provides 16 quasi-bidirectional I/O pins (two 8-bit ports P0–P15) to expand microcontroller I/O.

Manufacturer

Manufacturer: NXP Semiconductors. NXP is a Dutch multinational semiconductor company (originating from Philips Semiconductors) that designs and manufactures integrated circuits for automotive, industrial, and secure identification applications.

Application

- Extend microcontroller GPIOs via I2C
- Keypad and LED matrix control
- Relay/actuator driving for automation
- Display/backlight driving
- Sensor interfacing and data acquisition
- Home automation and consumer electronics
- Industrial automation and instrumentation
- Raspberry Pi/Arduino projects
PCF8575CDWR is a 16-bit I/O expander suitable wherever extra GPIOs are needed over I2C.

Equivalent

Equivalent products (16‑bit I2C I/O expanders) to PCF8575CDWR:
- NXP PCA9555 (and PCA8575)
- TI TCA9555
- ON Semiconductor CAT9555
- Microchip MCP23017
Note: pinouts, package, and feature details vary; check datasheets for I/O polarity, interrupts, addressing, and voltage limits.

Shipping

Shipping MethodsWe

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

Payment Methods

The Payment term is 100% Prepaid.

Currently, we only accept the below payment methods:

1. PayPal

2. Credit/ Debit Card

3. Wire Transfer

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