PCA9671: Remote 16-bit I/O expander for Fm+ I2C-bus with reset

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.

PCA9671: Product Block Diagram

Outline 3d SOT137-1

Data Sheets (1)

Name/Description	Modified Date
Remote 16-bit I/O expander for Fm+ I2C-bus with reset (REV 3.0) PDF (293.0 kB) PCA9671	29 Sep 2011

Application Notes (3)

Name/Description	Modified Date
Driving stepper motors using NXP® I2C-bus GPIO expanders (REV 2.0) PDF (275.0 kB) AN10814	24 Oct 2011
PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus (REV 1.0) PDF (90.0 kB) AN256	23 Mar 2009
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441	20 Jun 2007

Users Guides (4)

Name/Description	Modified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204	28 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA	03 Apr 2013
PCA9698 demonstration board OM6281 (REV 1.0) PDF (558.0 kB) UM10267	26 Sep 2008
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206	13 Jun 2006

Brochures (3)

Name/Description	Modified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540	01 Aug 2014
Versatile, easy-to-use GPIO expanders; NXP® 4/8/16-bit I2C/SMBus GPIO expanders PCA9536/54/54A/55 (REV 1.0) PDF (319.0 kB) 75016535	01 Aug 2008
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... (REV 1.0) PDF (1.1 MB) 75016543	01 Jun 2008

Package Information (3)

Name/Description	Modified Date
plastic small outline package; 24 leads; body width 7.5 mm (REV 1.0) PDF (379.0 kB) SOT137-1	08 Feb 2016
plastic thin shrink small outline package; 24 leads; body width 4.4 mm (REV 1.0) PDF (353.0 kB) SOT355-1	08 Feb 2016
plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm (REV 1.0) PDF (202.0 kB) SOT616-1	08 Feb 2016

Packing (3)

Name/Description	Modified Date
HVQFN24; reel pack; standard product orientation; 12NC ending 118 (REV 1.0) PDF (196.0 kB) SOT616-1_118	16 Jan 2014
TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 4.1) PDF (227.0 kB) SOT355-1_118	15 Apr 2013
SO24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 4.0) PDF (235.0 kB) SOT137-1_118	12 Apr 2013

Supporting Information (2)

Name/Description	Modified Date
Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE	08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE	08 Oct 2009

IBIS Model

PCA9671 IBIS model (REV 1.0) ZIP PCA9671_1 8/13/2014

Ordering Information

Product	Status
PCA9671D	Active
PCA9671BS	Active
PCA9671PW	Active

Package Information

Product ID	Outline Version	Reflow/Wave Soldering	Packing	Product Status	Part NumberOrdering code(12NC)	Marking	Chemical Content	LeadFree Conversion Date	IFR(FIT)	MTBF(hour)	MSL	MSL LF
PCA9671PW	SOT355-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	PCA9671PW,118 (9352 835 54118)	PCA9671PW	PCA9671PW	Always Pb-free	2.0	5E8	1	1
PCA9671PW	SOT355-1	SSOP-TSSOP-VSO-WAVE	Bulk Pack	Active	PCA9671PW,112 (9352 835 54112)	PCA9671PW	PCA9671PW	Always Pb-free	2.0	5E8	1	1
PCA9671BS	SOT616-1		Reel 13" Q1/T1	Active	PCA9671BS,118 (9352 833 69118)	9671	PCA9671BS	Always Pb-free	2.0	5E8	1	1
PCA9671D	SOT137-1	SO-SOJ-WAVE	Reel 13" Q1/T1	Active	PCA9671D,118 (9352 835 51118)	PCA9671D	PCA9671D	Always Pb-free	2.0	5E8	1	1
PCA9671D	SOT137-1	SO-SOJ-WAVE	Bulk Pack	Discontinued	PCA9671D,112 (9352 835 51112)	PCA9671D	PCA9671D	Always Pb-free	2.0	5E8	1	1