PCA9674; PCA9674A: Remote 8-bit I/O expander for Fm+ I²C-bus with interrupt

The PCA9674 and PCA9674A provides general purpose remote I/O expansion via the two-line bidirectional I²C‑bus (serial clock (SCL), serial data (SDA)).

The devices consist of eight quasi-bidirectional ports, 1 MHz I²C‑bus Fast-mode Plus (Fm+) family interface, with high speed data transfer it can support PWM dimming of LEDs, and higher I²C‑bus drive 30 mA for more devices can be on the bus without the need for bus buffers. Three hardware address inputs and interrupt output operating between 2.3 V and 5.5 V. The quasi-bidirectional port can be independently assigned as an input to monitor interrupt status or keypads, or as an output to activate indicator devices such as LEDs. The system master can read from the input port or write to the output port through a single register.

The low current consumption of 4.5 μA (typical, static) is great for mobile applications and the latched output ports have 25 mA high current sink drive capability for directly driving LEDs.

The PCA9674 and PCA9674A are identical except for the different, non-overlapping slave address. The three hardware selectable address pins can be decode to 64 addresses for the PCA9674 and 62 addresses for the PCA9674A, so there can be up to 126 of these I/O expanders PCA9674/74A together on the same I²C‑bus without the need for bus buffers, supporting up to 1008 I/Os (for example, 1008 LEDs).

The active LOW open-drain interrupt output (INT) can be connected to the interrupt logic of the microcontroller and is activated when any input state differs from its corresponding input port register state. It is used to indicate to the microcontroller that an input state has changed and the device needs to be interrogated without the microcontroller continuously polling the input register via the I²C‑bus.

The internal Power-On Reset (POR) initializes the I/Os as inputs with a weak internal pull-up 100 μA current source.

Outline 3d SOT403-1
Data Sheets (1)
Name/DescriptionModified Date
Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt (REV 7.0) PDF (792.0 kB) PCA9674_PCA9674A30 May 2013
Application Notes (3)
Name/DescriptionModified Date
Driving stepper motors using NXP® I2C-bus GPIO expanders (REV 2.0) PDF (275.0 kB) AN1081424 Oct 2011
PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus (REV 1.0) PDF (90.0 kB) AN25623 Mar 2009
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN1044120 Jun 2007
Users Guides (4)
Name/DescriptionModified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM1020428 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA03 Apr 2013
PCA9698 demonstration board OM6281 (REV 1.0) PDF (558.0 kB) UM1026726 Sep 2008
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM1020613 Jun 2006
Brochures (3)
Name/DescriptionModified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 7501754001 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) 7501653501 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) 7501654301 Jun 2008
Package Information (3)
Name/DescriptionModified Date
plastic small outline package; 16 leads; body width 7.5 mm (REV 1.0) PDF (317.0 kB) SOT162-108 Feb 2016
plastic thin shrink small outline package; 16 leads; body width 4.4 mm (REV 1.0) PDF (300.0 kB) SOT403-108 Feb 2016
plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 3 x 3 x 0.85 mm (REV 1.0) PDF (201.0 kB) SOT758-108 Feb 2016
Packing (3)
Name/DescriptionModified Date
SO16; Reel dry pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,518 or... (REV 1.0) PDF (271.0 kB) SOT162-1_51825 Nov 2014
HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 2.0) PDF (262.0 kB) SOT758-1_11818 Apr 2013
TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (218.0 kB) SOT403-1_11808 Apr 2013
Supporting Information (3)
Name/DescriptionModified Date
Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE08 Oct 2009
IBIS Model
Ordering Information
ProductStatus
PCA9674APWActive
PCA9674BSActive
PCA9674ABSActive
PCA9674ADActive
PCA9674DActive
PCA9674PWActive
Package Information
Product IDPackage DescriptionOutline VersionReflow/Wave SolderingPackingProduct StatusPart NumberOrdering code(12NC)MarkingChemical ContentRoHS / Pb Free / RHFLeadFree Conversion DateEFRIFR(FIT)MTBF(hour)MSLMSL LF
PCA9674APWSOT403-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9674APW,118 (9352 827 43118)9674APCA9674APWAlways Pb-free0.02.05E811
Bulk PackActivePCA9674APW,112 (9352 827 43112)9674APCA9674APWAlways Pb-free0.02.05E811
PCA9674ADSOT162-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE
Reel 13" Q1/T1 in DrypackActivePCA9674AD,518 (9352 827 41518)PCA9674ADPCA9674ADAlways Pb-free0.02.05E812
Tube in DrypackActivePCA9674AD,512 (9352 827 41512)PCA9674ADPCA9674ADAlways Pb-free0.02.05E812
PCA9674PWSOT403-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9674PW,118 (9352 827 35118)PCA9674PCA9674PWAlways Pb-free0.02.05E811
Bulk PackActivePCA9674PW,112 (9352 827 35112)PCA9674PCA9674PWAlways Pb-free0.02.05E811
PCA9674BSSOT758-1Reel 13" Q1/T1ActivePCA9674BS,118 (9352 827 38118)674PCA9674BSAlways Pb-free0.02.05E811
PCA9674DSOT162-1SO-SOJ-REFLOW SO-SOJ-WAVE
SO-SOJ-REFLOW SO-SOJ-WAVE
Reel 13" Q1/T1 in DrypackActivePCA9674D,518 (9352 827 36518)PCA9674DPCA9674DAlways Pb-free0.02.05E812
Tube in DrypackActivePCA9674D,512 (9352 827 36512)PCA9674DPCA9674DAlways Pb-free0.02.05E812
PCA9674ABSSOT758-1Reel 13" Q1/T1ActivePCA9674ABS,118 (9352 827 39118)74APCA9674ABSAlways Pb-free0.02.05E811
Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt pca9674_pca9674a
Driving stepper motors using NXP® I2C-bus GPIO expanders pca9698
PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus PCA9553
Level shifting techniques in I2C-bus design pca9685pw
I2C-bus specification and user manual pca9685pw
I2C-bus specification and user manual pca9685pw
PCA9698 demonstration board OM6281 PCA9553
I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
Versatile, easy-to-use GPIO expanders; NXP® 4/8/16-bit I2C/SMBus GPIO expanders PCA9536/54/54A/55 pcf8570p
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... PMEG6010CE_AUTOMOTIVE
PCA9674 IBIS model PCA9674PW
SOT403-1 LPC812M101JDH16
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
Reel 13" Q1/T1 LPC812M101JDH16
plastic small outline package; 16 leads; body width 7.5 mm TJF1052IT
Footprint for reflow soldering NPIC6C596A_Q100
Footprint for wave soldering NPIC6C596A_Q100
SO16; Reel dry pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,518 or... TJF1052IT
plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 3 x 3 x 0.85 mm PCF2123
HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... PCF2123
PCA9633
TJF1052IT
PCF7900VHN