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PCA9671 Datasheet

Remote 16-bit I/O expander

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PCA9671
Remote 16-bit I/O expander for Fm+ I2C-bus with reset
Rev. 01 — 20 December 2006
Product data sheet
1. General description
The PCA9671 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
(Fm+) family.
The PCA9671 is a drop in upgrade for the PCF8575 providing higher 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 (64
versus 8) to allow many more devices on the bus without address conflicts.
The difference between the PCA9671 and the PCF8575 is that the interrupt output on the
PCF8575 is replaced by a RESET input on the PCA9671.
The device consists of a 16-bit quasi-bidirectional port and an I2C-bus interface. The
PCA9671 has a low current consumption and includes latched outputs with 25 mA high
current drive capability for directly driving LEDs. The internal Power-On Reset (POR),
hardware reset pin (RESET) or software reset sequence initializes the I/Os as inputs.
2. Features
I 1 MHz I2C-bus interface
I Compliant with the I2C-bus Fast-mode and Standard-mode
I SDA with 30 mA sink capability for 4000 pF buses
I 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os
I 16-bit remote I/O pins that default to inputs at power-up
I Latched outputs with 25 mA sink capability for directly driving LEDs
I Total package sink capability of 400 mA
I Active LOW reset input
I 64 programmable slave addresses using 3 address pins
I Readable device ID (manufacturer, device type, and revision)
I Low standby current
I 40 °C to +85 °C operation
I ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115, and 1000 V CDM per JESD22-C101
I Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
I Packages offered: SO24, SSOP24, QSOP24, TSSOP24, HVQFN24, DHVQFN24


NXP Semiconductors Electronic Components Datasheet

PCA9671 Datasheet

Remote 16-bit I/O expander

No Preview Available !

NXP Semiconductors
PCA9671
Remote 16-bit I/O expander for Fm+ I2C-bus with reset
3. Applications
I LED signs and displays
I Servers
I Industrial control
I Medical equipment
I PLCs
I Cellular telephones
I Gaming machines
I Instrumentation and test measurement
4. Ordering information
Table 1. Ordering information
Type
number
Topside
mark
Package
Name
Description
Version
PCA9671D PCA9671D SO24
plastic small outline package; 24 leads; body width 7.5 mm
SOT137-1
PCA9671DB PCA9671DB SSOP24 plastic shrink small outline package; 24 leads; body width 5.3 mm SOT340-1
PCA9671DK PCA9671
SSOP24[1] plastic shrink small outline package; 24 leads; body width 3.9 mm; SOT556-1
lead pitch 0.635 mm
PCA9671PW PCA9671PW TSSOP24 plastic thin shrink small outline package; 24 leads;
body width 4.4 mm
SOT355-1
PCA9671BQ 9671
DHVQFN24 plastic dual in-line compatible thermal enhanced very thin quad SOT815-1
flat package; no leads; 24 terminals; body 3.5 × 5.5 × 0.85 mm
PCA9671BS 9671
HVQFN24 plastic thermal enhanced very thin quad flat package; no leads; SOT616-1
24 terminals; body 4 × 4 × 0.85 mm
[1] Also known as QSOP24.
PCA9671_1
Product data sheet
Rev. 01 — 20 December 2006
© NXP B.V. 2006. All rights reserved.
2 of 34


Part Number PCA9671
Description Remote 16-bit I/O expander
Maker NXP
Total Page 30 Pages
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