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PCA9673D Datasheet

Remote 16-bit I/O expander

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PCA9673
Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt and
reset
Rev. 2 — 29 September 2011
Product data sheet
1. 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.
2. Features and benefits
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)


NXP Semiconductors Electronic Components Datasheet

PCA9673D Datasheet

Remote 16-bit I/O expander

No Preview Available !

NXP Semiconductors
PCA9673
Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt and reset
Low standby current
40 C to +85 C operation
ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
Packages offered: SO24, TSSOP24, HVQFN24, DHVQFN24
3. Applications
LED signs and displays
Servers
Industrial control
Medical equipment
PLCs
Cellular telephones
Gaming machines
Instrumentation and test measurement
4. Ordering information
Table 1. Ordering information
Type number Topside
mark
Package
Name
Description
PCA9673D PCA9673D SO24
plastic small outline package; 24 leads; body width 7.5 mm
PCA9673PW PCA9673PW TSSOP24 plastic thin shrink small outline package; 24 leads;
body width 4.4 mm
PCA9673BQ 9673
DHVQFN24 plastic dual in-line compatible thermal enhanced very thin quad
flat package; no leads; 24 terminals; body 3.5 5.5 0.85 mm
PCA9673BS 9673
HVQFN24 plastic thermal enhanced very thin quad flat package; no leads;
24 terminals; body 4 4 0.85 mm
Version
SOT137-1
SOT355-1
SOT815-1
SOT616-1
PCA9673
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 29 September 2011
© NXP B.V. 2011. All rights reserved.
2 of 33


Part Number PCA9673D
Description Remote 16-bit I/O expander
Maker NXP
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PCA9673D Datasheet PDF






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