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 | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCA9673BQ | PCA9673BQ,118 | 9352 835 86118 | Volume production | SOT815-1
(DHVQFN24) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9673BS | PCA9673BS,118 | 9352 835 87118 | Volume production | SOT616-1
(HVQFN24) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9673D | PCA9673D,112 | 9352 835 55112 | Volume production | SOT137 | Tube | Standard Marking | |
| PCA9673D | PCA9673D,118 | 9352 835 55118 | Volume production | SOT137 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9673DB | PCA9673DB,112 | 9352 835 56112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | |
| PCA9673DB | PCA9673DB,118 | 9352 835 56118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9673DK | PCA9673DK,118 | 9352 835 57118 | Volume production | SOT556-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9673PW | PCA9673PW,112 | 9352 835 58112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | |
| PCA9673PW | PCA9673PW,118 | 9352 835 58118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| PCA9673BQ | PCA9673BQ,118 | PCA9673BQ |
| Always Pb-free | ||||
| PCA9673BS | PCA9673BS,118 | PCA9673BS |
| Always Pb-free | ||||
| PCA9673D | PCA9673D,112 | PCA9673D |
| Always Pb-free | ||||
| PCA9673D | PCA9673D,118 | PCA9673D |
| Always Pb-free | ||||
| PCA9673DB | PCA9673DB,112 | PCA9673DB |
| Always Pb-free | ||||
| PCA9673DB | PCA9673DB,118 | PCA9673DB |
| Always Pb-free | ||||
| PCA9673DK | PCA9673DK,118 | PCA9673DK |
| Always Pb-free | ||||
| PCA9673PW | PCA9673PW,112 | PCA9673PW |
| Always Pb-free | ||||
| PCA9673PW | PCA9673PW,118 | PCA9673PW |
| Always Pb-free |
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9673BQ | 9352 835 86118 | PCA9673BQ,118 | Order samples | |||||||
| PCA9673BS | 9352 835 87118 | PCA9673BS,118 | Order samples | |||||||
| PCA9673D | 9352 835 55112 | PCA9673D,112 | NA | ARROW ELECTRONICS | 988 | 11/19/2009 | Buy online | not available | ||
| PCA9673D | 9352 835 55118 | PCA9673D,118 | NA | ARROW ELECTRONICS | 988 | 11/19/2009 | Buy online | Order samples | ||
| NA | DIGI-KEY CORPORATION | 1,000 | 11/20/2009 | Buy online | ||||||
| PCA9673DB | 9352 835 56112 | PCA9673DB,112 | NA | DIGI-KEY CORPORATION | 157 | 11/20/2009 | Buy online | not available | ||
| PCA9673DB | 9352 835 56118 | PCA9673DB,118 | NA | FUTURE ELECTRONICS | 200 | 11/19/2009 | Buy online | Order samples | ||
| PCA9673DK | 9352 835 57118 | PCA9673DK,118 | NA | DIGI-KEY CORPORATION | 2,500 | 11/20/2009 | Buy online | Order samples | ||
| PCA9673PW | 9352 835 58112 | PCA9673PW,112 | NA | DIGI-KEY CORPORATION | 1,560 | 11/20/2009 | Buy online | not available | ||
| PCA9673PW | 9352 835 58118 | PCA9673PW,118 | NA | MOUSER ELECTRONICS | 200 | 11/20/2009 | Buy online | Order samples | ||
| NA | MOUSER ELECTRONICS | 200 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 100 | 11/19/2009 | Buy online |
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Application Notes
Support Documents