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PCA9673
Datasheet
General description
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.
Features
- 1 MHz I2C-bus interface
- Compliant with the I2C-bus Fast and Standard modes
- SDA with 30 mA sink capability for 4000 pF buses
- 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os
- 16-bit remote I/O pins that default to inputs at power-up
- Latched outputs with 25 mA sink capability for directly driving LEDs
- Total package sink capability of 400 mA
- Active LOW open-drain interrupt output
- 16 programmable slave addresses using 2 address pins
- Readable device ID (manufacturer, device type, and revision)
- Low standby current
- -40 Cel to +85 Cel operation
- ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
- Packages offered: SO24, SSOP24, QSOP24, TSSOP24, HVQFN24, DHVQFN24
Products/packages
| 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 |
Pricing/ordering/availability
| 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 |
Applications
- LED signs and displays
- Servers
- Industrial control
- Medical equipment
- PLCs
- Cellular telephones
- Gaming machines
- Instrumentation and test measurement
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Technical documents
Application Notes
AN10441_1;
Level shifting techniques in I (20-Jun-07)
Support Documents
75011212;
I2C 2002-1A Evaluation Board Kit (01-Mar-03)
UM10204_3;
I2C-bus specification and user manual (26-Jun-07)
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