The PCA9673 provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C-bus) and is a part of the Fast-mode Plus family.
The PCA9673 is a drop in upgrade for the PCF8575 providing higher Fast-mode Plus (Fm+) I2C-bus speeds (1 MHz versus 400 kHz) so that the output can support PWM dimming of LEDs, higher I2C-bus drive (30 mA versus 3 mA) so that many more devices can be on the bus without the need for bus buffers, higher total package sink capacity (400 mA versus 100 mA) that supports having all 25 mA LEDs on at the same time and more device addresses (16 versus 8) are available to allow many more devices on the bus without address conflicts.
The difference between the PCA9673 and the PCF8575 is that the A2 address pin is replaced by a RESET input on the PCA9673.
The device consists of a 16-bit quasi-bidirectional port and an I2C-bus interface. The PCA9673 has a low current consumption and includes latched outputs with 25 mA high current drive capability for directly driving LEDs.
It also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C-bus.
The internal Power-On Reset (POR), hardware reset pin (RESET) or software reset sequence initializes the I/Os as inputs.
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9673BQ | PCA9673BQ-T | 9352 835 86118 | Volume production | SOT815-1
(DHVQFN24) | Reel Pack, SMD, 13" | Standard Marking | PCA9673BQ
| Always Pb-free |
| PCA9673BS | PCA9673BS-T | 9352 835 87118 | Volume production | SOT616-1
(HVQFN24) | Reel Pack, SMD, 13" | Standard Marking | PCA9673BS
| Always Pb-free |
| PCA9673D | PCA9673D | 9352 835 55112 | Volume production | SOT137-1
(SO24) | Tube | Standard Marking | PCA9673D
| Always Pb-free |
| PCA9673D | PCA9673D-T | 9352 835 55118 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" | Standard Marking | PCA9673D
| Always Pb-free |
| PCA9673DB | PCA9673DB | 9352 835 56112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | PCA9673DB
| Always Pb-free |
| PCA9673DB | PCA9673DB-T | 9352 835 56118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | PCA9673DB
| Always Pb-free |
| PCA9673DK | PCA9673DK-T | 9352 835 57118 | Volume production | SOT556-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | PCA9673DK
| Always Pb-free |
| PCA9673PW | PCA9673PW | 9352 835 58112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | PCA9673PW
| Always Pb-free |
| PCA9673PW | PCA9673PW-T | 9352 835 58118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking | PCA9673PW
| Always Pb-free |
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCA9673BQ | 9352 835 86118 | Order samples | ||||||
| PCA9673BS | 9352 835 87118 | Order samples | ||||||
| PCA9673D | 9352 835 55112 | not available | ||||||
| PCA9673D | 9352 835 55118 | NA | DIGI-KEY CORPORATION | 1,000 | 8/5/2008 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 1,000 | 8/5/2008 | Buy online | ||||
| PCA9673DB | 9352 835 56112 | NA | DIGI-KEY CORPORATION | 249 | 8/5/2008 | Buy online | not available | |
| PCA9673DB | 9352 835 56118 | Order samples | ||||||
| PCA9673DK | 9352 835 57118 | NA | DIGI-KEY CORPORATION | 2,500 | 8/5/2008 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 2,490 | 8/5/2008 | Buy online | ||||
| PCA9673PW | 9352 835 58112 | NA | DIGI-KEY CORPORATION | 196 | 8/5/2008 | Buy online | not available | |
| PCA9673PW | 9352 835 58118 | Order samples |
Related applications
Digital media adapters
LCD display - discretes focus
PDA - discretes focus
Motherboard components
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)
Intelligent washing machine
PCI analog/DVB-T stereo TV receiver
Nexperia UMA-enabled GSM/GPRS/EDGE VAS system solution (6100)
Cellular phone - MMS functionality
LCD TV - MMS functionality
Set-top box - MMS functionality
Application Notes
Support Documents
The information published on product information pages of the www.nxp.com or www.semiconductors.com websites is an extract from product data sheets and is for information purposes only. For detailed information please check the most recent version of the relevant product data sheet as published on these websites. In the event of any conflict between product information pages and data sheets or deviations from information provided in the product data sheets on these product information pages, the information provided in the product data sheets shall prevail.
The product status of the product(s) described in the product data sheet may have changed since publication of the data sheet and therefore information in datasheets on product status may be outdated. The latest information on product status is published on the product information pages of the above-mentioned websites.
As from October 1st, 2006 Philips Semiconductors has a new trade name - NXP Semiconductors, which will be used in future data sheets together with new contact details. In data sheets where the previous Philips references remain, please use the new links as shown below.
The copyright notice at the bottom of each page (or elsewhere in the document, depending on the version)
- © Koninklijke Philips Electronics N.V. (year). All rights reserved -
is replaced with:
- © NXP B.V. (year). All rights reserved.-
If you have any questions related to the data sheet, please contact our nearest sales office via e-mail or phone (details via salesaddresses@nxp.com). Thank you for your cooperation and understanding.